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library/libxlsxwriter/test/functional/base_test_class.py

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+###############################################################################
+#
+# Base test class for libxlsxwriter functional tests.
+#
+# Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+#
+
+import unittest
+import os
+from helper_functions import _compare_xlsx_files
+
+
+class XLSXBaseTest(unittest.TestCase):
+    """
+    Test file created with libxlsxwriter against a file created by Excel.
+
+    """
+
+    def setUp(self):
+        self.maxDiff = None
+
+        self.no_system_error = 0
+        self.got_filename = ''
+        self.exp_filename = ''
+        self.ignore_files = []
+        self.ignore_elements = {}
+
+    def run_exe_test(self, exe_name, exp_filename=None):
+        """Run C exe and compare output xlsx file with the Excel file."""
+
+        # Run the C executable to generate the "got" xlsx file.
+        got = os.system("cd test/functional/src; ./%s" % exe_name)
+        self.assertEqual(got, self.no_system_error)
+
+        # Create the path/file names for the xlsx/xlsm files to compare.
+        if exp_filename and exp_filename.endswith('.xlsm'):
+            got_filename = exe_name.replace('test_', '') + '.xlsm'
+        else:
+            got_filename = exe_name.replace('test_', '') + '.xlsx'
+
+        if not exp_filename:
+            exp_filename = got_filename
+
+        self.got_filename = 'test/functional/src/test_' + got_filename
+        self.exp_filename = 'test/functional/xlsx_files/' + exp_filename
+
+        # Do the comparison between the files.
+        got, exp = _compare_xlsx_files(self.got_filename,
+                                       self.exp_filename,
+                                       self.ignore_files,
+                                       self.ignore_elements)
+        self.assertEqual(exp, got)
+
+    def tearDown(self):
+        # Cleanup.
+        if os.path.exists(self.got_filename):
+            os.remove(self.got_filename)
+
+        self.ignore_files = []
+        self.ignore_elements = {}

library/libxlsxwriter/test/functional/helper_functions.py

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+###############################################################################
+#
+# Helper functions for testing libxlsxwriter.
+#
+# Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+#
+
+import re
+import sys
+import os.path
+from zipfile import ZipFile
+from zipfile import BadZipfile
+from zipfile import LargeZipFile
+
+
+def _xml_to_list(xml_str):
+    # Convert test generated XML strings into lists for comparison testing.
+
+    # Split the XML string at tag boundaries.
+    parser = re.compile(r'>\s*<')
+    elements = parser.split(xml_str.strip())
+
+    elements = [s.replace("\r", "") for s in elements]
+
+    # Add back the removed brackets.
+    for index, element in enumerate(elements):
+        if not element[0] == '<':
+            elements[index] = '<' + elements[index]
+        if not element[-1] == '>':
+            elements[index] = elements[index] + '>'
+
+    return elements
+
+
+def _vml_to_list(vml_str):
+    # Convert an Excel generated VML string into a list for comparison testing.
+    #
+    # The VML data in the testcases is taken from Excel 2007 files. The data
+    # has to be massaged significantly to make it suitable for comparison.
+    #
+    # The VML produced by XlsxWriter can be parsed as ordinary XML.
+    vml_str = vml_str.replace("\r", "")
+
+    vml = vml_str.split("\n")
+    vml_str = ''
+
+    for line in vml:
+        # Skip blank lines.
+        if not line:
+            continue
+
+        # Strip leading and trailing whitespace.
+        line = line.strip()
+
+        # Convert VMLs attribute quotes.
+        line = line.replace("'", '"')
+
+        # Add space between attributes.
+        if re.search('"$', line):
+            line += " "
+
+        # Add newline after element end.
+        if re.search('>$', line):
+            line += "\n"
+
+        # Split multiple elements.
+        line = line.replace('><', ">\n<")
+
+        # Put all of Anchor on one line.
+        if line == "<x:Anchor>\n":
+            line = line.strip()
+
+        vml_str += line
+
+    # Remove the final newline.
+    vml_str = vml_str.rstrip()
+
+    return vml_str.split("\n")
+
+
+def _sort_rel_file_data(xml_elements):
+    # Re-order the relationship elements in an array of XLSX XML rel
+    # (relationship) data. This is necessary for comparison since
+    # Excel can produce the elements in a semi-random order.
+
+    # We don't want to sort the first or last elements.
+    first = xml_elements.pop(0)
+    last = xml_elements.pop()
+
+    # Sort the relationship elements.
+    xml_elements.sort()
+
+    # Add back the first and last elements.
+    xml_elements.insert(0, first)
+    xml_elements.append(last)
+
+    return xml_elements
+
+
+def _compare_xlsx_files(got_file, exp_file, ignore_files, ignore_elements):
+    # Compare two XLSX files by extracting the XML files from each
+    # zip archive and comparing them.
+    #
+    # This is used to compare an "expected" file produced by Excel
+    # with a "got" file produced by XlsxWriter.
+    #
+    # In order to compare the XLSX files we convert the data in each
+    # XML file into an list of XML elements.
+    try:
+        # Open the XlsxWriter as a zip file for testing.
+        got_zip = ZipFile(got_file, 'r')
+    except IOError:
+        # For Python 2.5+ compatibility.
+        e = sys.exc_info()[1]
+        error = "XlsxWriter file error: " + str(e)
+        return error, ''
+    except (BadZipfile, LargeZipFile):
+        e = sys.exc_info()[1]
+        error = "XlsxWriter zipfile error, '" + exp_file + "': " + str(e)
+        return error, ''
+
+    try:
+        # Open the Excel as a zip file for testing.
+        exp_zip = ZipFile(exp_file, 'r')
+    except IOError:
+        e = sys.exc_info()[1]
+        error = "Excel file error: " + str(e)
+        return error, ''
+    except (BadZipfile, LargeZipFile):
+        e = sys.exc_info()[1]
+        error = "Excel zipfile error, '" + exp_file + "': " + str(e)
+        return error, ''
+
+    # Get the filenames from the zip files.
+    got_files = sorted(got_zip.namelist())
+    exp_files = sorted(exp_zip.namelist())
+
+    # Ignore some test specific filenames.
+    got_files = [name for name in got_files if name not in ignore_files]
+    exp_files = [name for name in exp_files if name not in ignore_files]
+
+    # Check that each XLSX container has the same files.
+    if got_files != exp_files:
+        return got_files, exp_files
+
+    # Compare each file in the XLSX containers.
+    for filename in exp_files:
+
+        got_xml_str = got_zip.read(filename)
+        exp_xml_str = exp_zip.read(filename)
+
+        # Compare binary files with string comparison based on extension.
+        extension = os.path.splitext(filename)[1]
+        if extension in ('.png', '.jpeg', '.gif','.bmp', '.bin'):
+            if got_xml_str != exp_xml_str:
+                return 'got: %s' % filename, 'exp: %s' % filename
+            continue
+
+        if sys.version_info >= (3, 0, 0):
+            got_xml_str = got_xml_str.decode('utf-8')
+            exp_xml_str = exp_xml_str.decode('utf-8')
+
+        # Remove dates and user specific data from the core.xml data.
+        if filename == 'docProps/core.xml':
+            exp_xml_str = re.sub(r' ?John', '', exp_xml_str)
+            exp_xml_str = re.sub(r'\d\d\d\d-\d\d-\d\dT\d\d\:\d\d:\d\dZ',
+                                 '', exp_xml_str)
+            got_xml_str = re.sub(r'\d\d\d\d-\d\d-\d\dT\d\d\:\d\d:\d\dZ',
+                                 '', got_xml_str)
+
+        # Remove workbookView dimensions which are almost always different
+        # and calcPr which can have different Excel version ids.
+        if filename == 'xl/workbook.xml':
+            exp_xml_str = re.sub(r'<workbookView[^>]*>',
+                                 '<workbookView/>', exp_xml_str)
+            got_xml_str = re.sub(r'<workbookView[^>]*>',
+                                 '<workbookView/>', got_xml_str)
+            exp_xml_str = re.sub(r'<calcPr[^>]*>',
+                                 '<calcPr/>', exp_xml_str)
+            got_xml_str = re.sub(r'<calcPr[^>]*>',
+                                 '<calcPr/>', got_xml_str)
+
+        # Remove printer specific settings from Worksheet pageSetup elements.
+        if re.match(r'xl/worksheets/sheet\d.xml', filename):
+            exp_xml_str = re.sub(r'horizontalDpi="200" ', '', exp_xml_str)
+            exp_xml_str = re.sub(r'verticalDpi="200" ', '', exp_xml_str)
+            exp_xml_str = re.sub(r'(<pageSetup[^>]*) r:id="rId1"',
+                                 r'\1', exp_xml_str)
+
+        # Remove Chart pageMargin dimensions which are almost always different.
+        if re.match(r'xl/charts/chart\d.xml', filename):
+            exp_xml_str = re.sub(r'<c:pageMargins[^>]*>',
+                                 '<c:pageMargins/>', exp_xml_str)
+            got_xml_str = re.sub(r'<c:pageMargins[^>]*>',
+                                 '<c:pageMargins/>', got_xml_str)
+
+        # Convert the XML string to lists for comparison.
+        if re.search('.vml$', filename):
+            got_xml = _xml_to_list(got_xml_str)
+            exp_xml = _vml_to_list(exp_xml_str)
+        else:
+            got_xml = _xml_to_list(got_xml_str)
+            exp_xml = _xml_to_list(exp_xml_str)
+
+        # Ignore test specific XML elements for defined filenames.
+        if filename in ignore_elements:
+            patterns = ignore_elements[filename]
+
+            for pattern in patterns:
+                exp_xml = [tag for tag in exp_xml if not re.match(pattern, tag)]
+                got_xml = [tag for tag in got_xml if not re.match(pattern, tag)]
+
+        # Reorder the XML elements in the XLSX relationship files.
+        if filename == '[Content_Types].xml' or re.search('.rels$', filename):
+            got_xml = _sort_rel_file_data(got_xml)
+            exp_xml = _sort_rel_file_data(exp_xml)
+
+        # Compared the XML elements in each file.
+        if got_xml != exp_xml:
+            got_xml.insert(0, filename)
+            exp_xml.insert(0, filename)
+            return got_xml, exp_xml
+
+    # If we got here the files are the same.
+    return 'Ok', 'Ok'

library/libxlsxwriter/test/functional/src/test_array_formula01.c

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+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_array_formula01.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+
+    worksheet_write_number(worksheet, 0, 1, 0, NULL);
+    worksheet_write_number(worksheet, 1, 1, 0, NULL);
+    worksheet_write_number(worksheet, 2, 1, 0, NULL);
+    worksheet_write_number(worksheet, 0, 2, 0, NULL);
+    worksheet_write_number(worksheet, 1, 2, 0, NULL);
+    worksheet_write_number(worksheet, 2, 2, 0, NULL);
+
+    worksheet_write_array_formula(worksheet, RANGE("A1:A3"), "{=SUM(B1:C1*B2:C2)}", NULL);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_array_formula02.c

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+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_array_formula02.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_format    *bold      = workbook_add_format(workbook);
+
+    format_set_bold(bold);
+
+    worksheet_write_number(worksheet, 0, 1, 0, NULL);
+    worksheet_write_number(worksheet, 1, 1, 0, NULL);
+    worksheet_write_number(worksheet, 2, 1, 0, NULL);
+    worksheet_write_number(worksheet, 0, 2, 0, NULL);
+    worksheet_write_number(worksheet, 1, 2, 0, NULL);
+    worksheet_write_number(worksheet, 2, 2, 0, NULL);
+
+    worksheet_write_array_formula(worksheet, RANGE("A1:A3"), "{=SUM(B1:C1*B2:C2)}", bold);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_array_formula03.c

@@ -0,0 +1,27 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_array_formula03.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+
+    worksheet_write_number(worksheet, 0, 1, 0, NULL);
+    worksheet_write_number(worksheet, 1, 1, 0, NULL);
+    worksheet_write_number(worksheet, 2, 1, 0, NULL);
+    worksheet_write_number(worksheet, 0, 2, 0, NULL);
+    worksheet_write_number(worksheet, 1, 2, 0, NULL);
+    worksheet_write_number(worksheet, 2, 2, 0, NULL);
+
+    worksheet_write_array_formula(worksheet, RANGE("A1:A1"), "{=SUM(B1:C1*B2:C2)}", NULL);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_array_formula04.c

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+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_array_formula04.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+
+    worksheet_write_array_formula(worksheet, RANGE("A1:A3"), "{=SUM(B1:C1*B2:C2)}", NULL);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_autofilter00.c

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+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_autofilter00.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    uint16_t i;
+
+    struct row {
+        char region[16];
+        char item[16];
+        int  volume;
+        char month[16];
+    };
+
+    struct row data[] = {
+        {"East",  "Apple",   9000, "July"      },
+        {"East",  "Apple",   5000, "July"      },
+        {"South", "Orange",  9000, "September" },
+        {"North", "Apple",   2000, "November"  },
+        {"West",  "Apple",   9000, "November"  },
+        {"South", "Pear",    7000, "October"   },
+        {"North", "Pear",    9000, "August"    },
+        {"West",  "Orange",  1000, "December"  },
+        {"West",  "Grape",   1000, "November"  },
+        {"South", "Pear",   10000, "April"     },
+        {"West",  "Grape",   6000, "January"   },
+        {"South", "Orange",  3000, "May"       },
+        {"North", "Apple",   3000, "December"  },
+        {"South", "Apple",   7000, "February"  },
+        {"West",  "Grape",   1000, "December"  },
+        {"East",  "Grape",   8000, "February"  },
+        {"South", "Grape",  10000, "June"      },
+        {"West",  "Pear",    7000, "December"  },
+        {"South", "Apple",   2000, "October"   },
+        {"East",  "Grape",   7000, "December"  },
+        {"North", "Grape",   6000, "April"     },
+        {"East",  "Pear",    8000, "February"  },
+        {"North", "Apple",   7000, "August"    },
+        {"North", "Orange",  7000, "July"      },
+        {"North", "Apple",   6000, "June"      },
+        {"South", "Grape",   8000, "September" },
+        {"West",  "Apple",   3000, "October"   },
+        {"South", "Orange", 10000, "November"  },
+        {"West",  "Grape",   4000, "July"      },
+        {"North", "Orange",  5000, "August"    },
+        {"East",  "Orange",  1000, "November"  },
+        {"East",  "Orange",  4000, "October"   },
+        {"North", "Grape",   5000, "August"    },
+        {"East",  "Apple",   1000, "December"  },
+        {"South", "Apple",   10000, "March"    },
+        {"East",  "Grape",   7000, "October"   },
+        {"West",  "Grape",   1000, "September" },
+        {"East",  "Grape",  10000, "October"   },
+        {"South", "Orange",  8000, "March"     },
+        {"North", "Apple",   4000, "July"      },
+        {"South", "Orange",  5000, "July"      },
+        {"West",  "Apple",   4000, "June"      },
+        {"East",  "Apple",   5000, "April"     },
+        {"North", "Pear",    3000, "August"    },
+        {"East",  "Grape",   9000, "November"  },
+        {"North", "Orange",  8000, "October"   },
+        {"East",  "Apple",  10000, "June"      },
+        {"South", "Pear",    1000, "December"  },
+        {"North", "Grape",   10000, "July"     },
+        {"East",  "Grape",   6000, "February"  }
+    }; 
+
+
+    /* Write the column headers. */
+    worksheet_write_string(worksheet, 0, 0, "Region", NULL);
+    worksheet_write_string(worksheet, 0, 1, "Item",   NULL);
+    worksheet_write_string(worksheet, 0, 2, "Volume" , NULL);
+    worksheet_write_string(worksheet, 0, 3, "Month",  NULL);
+
+
+    /* Write the row data. */
+    for (i = 0; i < sizeof(data)/sizeof(struct row); i++) {
+        worksheet_write_string(worksheet, i + 1, 0, data[i].region, NULL);
+        worksheet_write_string(worksheet, i + 1, 1, data[i].item,   NULL);
+        worksheet_write_number(worksheet, i + 1, 2, data[i].volume, NULL);
+        worksheet_write_string(worksheet, i + 1, 3, data[i].month,  NULL);
+    }
+    
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_autofilter01.c

@@ -0,0 +1,99 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_autofilter01.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    uint16_t i;
+
+    struct row {
+        char region[16];
+        char item[16];
+        int  volume;
+        char month[16];
+    };
+
+    struct row data[] = {
+        {"East",  "Apple",   9000, "July"      },
+        {"East",  "Apple",   5000, "July"      },
+        {"South", "Orange",  9000, "September" },
+        {"North", "Apple",   2000, "November"  },
+        {"West",  "Apple",   9000, "November"  },
+        {"South", "Pear",    7000, "October"   },
+        {"North", "Pear",    9000, "August"    },
+        {"West",  "Orange",  1000, "December"  },
+        {"West",  "Grape",   1000, "November"  },
+        {"South", "Pear",   10000, "April"     },
+        {"West",  "Grape",   6000, "January"   },
+        {"South", "Orange",  3000, "May"       },
+        {"North", "Apple",   3000, "December"  },
+        {"South", "Apple",   7000, "February"  },
+        {"West",  "Grape",   1000, "December"  },
+        {"East",  "Grape",   8000, "February"  },
+        {"South", "Grape",  10000, "June"      },
+        {"West",  "Pear",    7000, "December"  },
+        {"South", "Apple",   2000, "October"   },
+        {"East",  "Grape",   7000, "December"  },
+        {"North", "Grape",   6000, "April"     },
+        {"East",  "Pear",    8000, "February"  },
+        {"North", "Apple",   7000, "August"    },
+        {"North", "Orange",  7000, "July"      },
+        {"North", "Apple",   6000, "June"      },
+        {"South", "Grape",   8000, "September" },
+        {"West",  "Apple",   3000, "October"   },
+        {"South", "Orange", 10000, "November"  },
+        {"West",  "Grape",   4000, "July"      },
+        {"North", "Orange",  5000, "August"    },
+        {"East",  "Orange",  1000, "November"  },
+        {"East",  "Orange",  4000, "October"   },
+        {"North", "Grape",   5000, "August"    },
+        {"East",  "Apple",   1000, "December"  },
+        {"South", "Apple",   10000, "March"    },
+        {"East",  "Grape",   7000, "October"   },
+        {"West",  "Grape",   1000, "September" },
+        {"East",  "Grape",  10000, "October"   },
+        {"South", "Orange",  8000, "March"     },
+        {"North", "Apple",   4000, "July"      },
+        {"South", "Orange",  5000, "July"      },
+        {"West",  "Apple",   4000, "June"      },
+        {"East",  "Apple",   5000, "April"     },
+        {"North", "Pear",    3000, "August"    },
+        {"East",  "Grape",   9000, "November"  },
+        {"North", "Orange",  8000, "October"   },
+        {"East",  "Apple",  10000, "June"      },
+        {"South", "Pear",    1000, "December"  },
+        {"North", "Grape",   10000, "July"     },
+        {"East",  "Grape",   6000, "February"  }
+    }; 
+
+
+    /* Write the column headers. */
+    worksheet_write_string(worksheet, 0, 0, "Region", NULL);
+    worksheet_write_string(worksheet, 0, 1, "Item",   NULL);
+    worksheet_write_string(worksheet, 0, 2, "Volume" , NULL);
+    worksheet_write_string(worksheet, 0, 3, "Month",  NULL);
+
+
+    /* Write the row data. */
+    for (i = 0; i < sizeof(data)/sizeof(struct row); i++) {
+        worksheet_write_string(worksheet, i + 1, 0, data[i].region, NULL);
+        worksheet_write_string(worksheet, i + 1, 1, data[i].item,   NULL);
+        worksheet_write_number(worksheet, i + 1, 2, data[i].volume, NULL);
+        worksheet_write_string(worksheet, i + 1, 3, data[i].month,  NULL);
+    }
+    
+
+    worksheet_autofilter(worksheet, 0, 0, 50, 3);
+
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_autofilter02.c

@@ -0,0 +1,114 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_autofilter02.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    uint16_t i;
+
+    struct row {
+        char region[16];
+        char item[16];
+        int  volume;
+        char month[16];
+    };
+
+    struct row data[] = {
+        {"East",  "Apple",   9000, "July"      },
+        {"East",  "Apple",   5000, "July"      },
+        {"South", "Orange",  9000, "September" },
+        {"North", "Apple",   2000, "November"  },
+        {"West",  "Apple",   9000, "November"  },
+        {"South", "Pear",    7000, "October"   },
+        {"North", "Pear",    9000, "August"    },
+        {"West",  "Orange",  1000, "December"  },
+        {"West",  "Grape",   1000, "November"  },
+        {"South", "Pear",   10000, "April"     },
+        {"West",  "Grape",   6000, "January"   },
+        {"South", "Orange",  3000, "May"       },
+        {"North", "Apple",   3000, "December"  },
+        {"South", "Apple",   7000, "February"  },
+        {"West",  "Grape",   1000, "December"  },
+        {"East",  "Grape",   8000, "February"  },
+        {"South", "Grape",  10000, "June"      },
+        {"West",  "Pear",    7000, "December"  },
+        {"South", "Apple",   2000, "October"   },
+        {"East",  "Grape",   7000, "December"  },
+        {"North", "Grape",   6000, "April"     },
+        {"East",  "Pear",    8000, "February"  },
+        {"North", "Apple",   7000, "August"    },
+        {"North", "Orange",  7000, "July"      },
+        {"North", "Apple",   6000, "June"      },
+        {"South", "Grape",   8000, "September" },
+        {"West",  "Apple",   3000, "October"   },
+        {"South", "Orange", 10000, "November"  },
+        {"West",  "Grape",   4000, "July"      },
+        {"North", "Orange",  5000, "August"    },
+        {"East",  "Orange",  1000, "November"  },
+        {"East",  "Orange",  4000, "October"   },
+        {"North", "Grape",   5000, "August"    },
+        {"East",  "Apple",   1000, "December"  },
+        {"South", "Apple",   10000, "March"    },
+        {"East",  "Grape",   7000, "October"   },
+        {"West",  "Grape",   1000, "September" },
+        {"East",  "Grape",  10000, "October"   },
+        {"South", "Orange",  8000, "March"     },
+        {"North", "Apple",   4000, "July"      },
+        {"South", "Orange",  5000, "July"      },
+        {"West",  "Apple",   4000, "June"      },
+        {"East",  "Apple",   5000, "April"     },
+        {"North", "Pear",    3000, "August"    },
+        {"East",  "Grape",   9000, "November"  },
+        {"North", "Orange",  8000, "October"   },
+        {"East",  "Apple",  10000, "June"      },
+        {"South", "Pear",    1000, "December"  },
+        {"North", "Grape",   10000, "July"     },
+        {"East",  "Grape",   6000, "February"  }
+    };
+
+
+    /* Write the column headers. */
+    worksheet_write_string(worksheet, 0, 0, "Region", NULL);
+    worksheet_write_string(worksheet, 0, 1, "Item",   NULL);
+    worksheet_write_string(worksheet, 0, 2, "Volume" , NULL);
+    worksheet_write_string(worksheet, 0, 3, "Month",  NULL);
+
+
+    lxw_row_col_options hidden = {.hidden = LXW_TRUE};
+
+
+    /* Write the row data. */
+    for (i = 0; i < sizeof(data)/sizeof(struct row); i++) {
+        worksheet_write_string(worksheet, i + 1, 0, data[i].region, NULL);
+        worksheet_write_string(worksheet, i + 1, 1, data[i].item,   NULL);
+        worksheet_write_number(worksheet, i + 1, 2, data[i].volume, NULL);
+        worksheet_write_string(worksheet, i + 1, 3, data[i].month,  NULL);
+
+        if (strcmp(data[i].region, "East") == 0) {
+            /* Row matches the filter, no further action required. */
+        }
+        else {
+            /* We need to hide rows that don't match the filter. */
+            worksheet_set_row_opt(worksheet, i + 1, LXW_DEF_ROW_HEIGHT, NULL, &hidden);
+        }
+    }
+
+    worksheet_autofilter(worksheet, 0, 0, 50, 3);
+
+    lxw_filter_rule filter_rule1 = {.criteria     = LXW_FILTER_CRITERIA_EQUAL_TO,
+                                    .value_string = "East"};
+
+    worksheet_filter_column(worksheet, 0, &filter_rule1);
+
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_autofilter03.c

@@ -0,0 +1,117 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_autofilter03.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    uint16_t i;
+
+    struct row {
+        char region[16];
+        char item[16];
+        int  volume;
+        char month[16];
+    };
+
+    struct row data[] = {
+        {"East",  "Apple",   9000, "July"      },
+        {"East",  "Apple",   5000, "July"      },
+        {"South", "Orange",  9000, "September" },
+        {"North", "Apple",   2000, "November"  },
+        {"West",  "Apple",   9000, "November"  },
+        {"South", "Pear",    7000, "October"   },
+        {"North", "Pear",    9000, "August"    },
+        {"West",  "Orange",  1000, "December"  },
+        {"West",  "Grape",   1000, "November"  },
+        {"South", "Pear",   10000, "April"     },
+        {"West",  "Grape",   6000, "January"   },
+        {"South", "Orange",  3000, "May"       },
+        {"North", "Apple",   3000, "December"  },
+        {"South", "Apple",   7000, "February"  },
+        {"West",  "Grape",   1000, "December"  },
+        {"East",  "Grape",   8000, "February"  },
+        {"South", "Grape",  10000, "June"      },
+        {"West",  "Pear",    7000, "December"  },
+        {"South", "Apple",   2000, "October"   },
+        {"East",  "Grape",   7000, "December"  },
+        {"North", "Grape",   6000, "April"     },
+        {"East",  "Pear",    8000, "February"  },
+        {"North", "Apple",   7000, "August"    },
+        {"North", "Orange",  7000, "July"      },
+        {"North", "Apple",   6000, "June"      },
+        {"South", "Grape",   8000, "September" },
+        {"West",  "Apple",   3000, "October"   },
+        {"South", "Orange", 10000, "November"  },
+        {"West",  "Grape",   4000, "July"      },
+        {"North", "Orange",  5000, "August"    },
+        {"East",  "Orange",  1000, "November"  },
+        {"East",  "Orange",  4000, "October"   },
+        {"North", "Grape",   5000, "August"    },
+        {"East",  "Apple",   1000, "December"  },
+        {"South", "Apple",   10000, "March"    },
+        {"East",  "Grape",   7000, "October"   },
+        {"West",  "Grape",   1000, "September" },
+        {"East",  "Grape",  10000, "October"   },
+        {"South", "Orange",  8000, "March"     },
+        {"North", "Apple",   4000, "July"      },
+        {"South", "Orange",  5000, "July"      },
+        {"West",  "Apple",   4000, "June"      },
+        {"East",  "Apple",   5000, "April"     },
+        {"North", "Pear",    3000, "August"    },
+        {"East",  "Grape",   9000, "November"  },
+        {"North", "Orange",  8000, "October"   },
+        {"East",  "Apple",  10000, "June"      },
+        {"South", "Pear",    1000, "December"  },
+        {"North", "Grape",   10000, "July"     },
+        {"East",  "Grape",   6000, "February"  }
+    };
+
+
+    /* Write the column headers. */
+    worksheet_write_string(worksheet, 0, 0, "Region", NULL);
+    worksheet_write_string(worksheet, 0, 1, "Item",   NULL);
+    worksheet_write_string(worksheet, 0, 2, "Volume", NULL);
+    worksheet_write_string(worksheet, 0, 3, "Month",  NULL);
+
+
+    lxw_row_col_options hidden = {.hidden = LXW_TRUE};
+
+
+    /* Write the row data. */
+    for (i = 0; i < sizeof(data)/sizeof(struct row); i++) {
+        worksheet_write_string(worksheet, i + 1, 0, data[i].region, NULL);
+        worksheet_write_string(worksheet, i + 1, 1, data[i].item,   NULL);
+        worksheet_write_number(worksheet, i + 1, 2, data[i].volume , NULL);
+        worksheet_write_string(worksheet, i + 1, 3, data[i].month,  NULL);
+
+        if (strcmp(data[i].region, "East") == 0 || strcmp(data[i].region, "South") == 0) {
+            /* Row matches the filter, no further action required. */
+        }
+        else {
+            /* We need to hide rows that don't match the filter. */
+            worksheet_set_row_opt(worksheet, i + 1, LXW_DEF_ROW_HEIGHT, NULL, &hidden);
+        }
+    }
+
+    worksheet_autofilter(worksheet, 0, 0, 50, 3);
+
+    lxw_filter_rule filter_rule1 = {.criteria     = LXW_FILTER_CRITERIA_EQUAL_TO,
+                                    .value_string = "East"};
+
+    lxw_filter_rule filter_rule2 = {.criteria     = LXW_FILTER_CRITERIA_EQUAL_TO,
+                                    .value_string = "South"};
+
+    worksheet_filter_column2(worksheet, 0, &filter_rule1, &filter_rule2, LXW_FILTER_OR);
+
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_autofilter04.c

@@ -0,0 +1,122 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_autofilter04.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    uint16_t i;
+
+    struct row {
+        char region[16];
+        char item[16];
+        int  volume;
+        char month[16];
+    };
+
+    struct row data[] = {
+        {"East",  "Apple",   9000, "July"      },
+        {"East",  "Apple",   5000, "July"      },
+        {"South", "Orange",  9000, "September" },
+        {"North", "Apple",   2000, "November"  },
+        {"West",  "Apple",   9000, "November"  },
+        {"South", "Pear",    7000, "October"   },
+        {"North", "Pear",    9000, "August"    },
+        {"West",  "Orange",  1000, "December"  },
+        {"West",  "Grape",   1000, "November"  },
+        {"South", "Pear",   10000, "April"     },
+        {"West",  "Grape",   6000, "January"   },
+        {"South", "Orange",  3000, "May"       },
+        {"North", "Apple",   3000, "December"  },
+        {"South", "Apple",   7000, "February"  },
+        {"West",  "Grape",   1000, "December"  },
+        {"East",  "Grape",   8000, "February"  },
+        {"South", "Grape",  10000, "June"      },
+        {"West",  "Pear",    7000, "December"  },
+        {"South", "Apple",   2000, "October"   },
+        {"East",  "Grape",   7000, "December"  },
+        {"North", "Grape",   6000, "April"     },
+        {"East",  "Pear",    8000, "February"  },
+        {"North", "Apple",   7000, "August"    },
+        {"North", "Orange",  7000, "July"      },
+        {"North", "Apple",   6000, "June"      },
+        {"South", "Grape",   8000, "September" },
+        {"West",  "Apple",   3000, "October"   },
+        {"South", "Orange", 10000, "November"  },
+        {"West",  "Grape",   4000, "July"      },
+        {"North", "Orange",  5000, "August"    },
+        {"East",  "Orange",  1000, "November"  },
+        {"East",  "Orange",  4000, "October"   },
+        {"North", "Grape",   5000, "August"    },
+        {"East",  "Apple",   1000, "December"  },
+        {"South", "Apple",   10000, "March"    },
+        {"East",  "Grape",   7000, "October"   },
+        {"West",  "Grape",   1000, "September" },
+        {"East",  "Grape",  10000, "October"   },
+        {"South", "Orange",  8000, "March"     },
+        {"North", "Apple",   4000, "July"      },
+        {"South", "Orange",  5000, "July"      },
+        {"West",  "Apple",   4000, "June"      },
+        {"East",  "Apple",   5000, "April"     },
+        {"North", "Pear",    3000, "August"    },
+        {"East",  "Grape",   9000, "November"  },
+        {"North", "Orange",  8000, "October"   },
+        {"East",  "Apple",  10000, "June"      },
+        {"South", "Pear",    1000, "December"  },
+        {"North", "Grape",   10000, "July"     },
+        {"East",  "Grape",   6000, "February"  }
+    };
+
+
+    /* Write the column headers. */
+    worksheet_write_string(worksheet, 0, 0, "Region", NULL);
+    worksheet_write_string(worksheet, 0, 1, "Item",   NULL);
+    worksheet_write_string(worksheet, 0, 2, "Volume" , NULL);
+    worksheet_write_string(worksheet, 0, 3, "Month",  NULL);
+
+
+    lxw_row_col_options hidden = {.hidden = LXW_TRUE};
+
+
+    /* Write the row data. */
+    for (i = 0; i < sizeof(data)/sizeof(struct row); i++) {
+        worksheet_write_string(worksheet, i + 1, 0, data[i].region, NULL);
+        worksheet_write_string(worksheet, i + 1, 1, data[i].item,   NULL);
+        worksheet_write_number(worksheet, i + 1, 2, data[i].volume, NULL);
+        worksheet_write_string(worksheet, i + 1, 3, data[i].month,  NULL);
+
+        if (strcmp(data[i].region, "East") == 0 &&
+            data[i].volume > 3000 && data[i].volume < 8000)
+        {
+            /* Row matches the filter, no further action required. */
+        }
+        else {
+            /* We need to hide rows that don't match the filter. */
+            worksheet_set_row_opt(worksheet, i + 1, LXW_DEF_ROW_HEIGHT, NULL, &hidden);
+        }
+    }
+
+    worksheet_autofilter(worksheet, 0, 0, 50, 3);
+
+    lxw_filter_rule filter_rule1 = {.criteria     = LXW_FILTER_CRITERIA_EQUAL_TO,
+                                    .value_string = "East"};
+
+    lxw_filter_rule filter_rule2 = {.criteria     = LXW_FILTER_CRITERIA_GREATER_THAN,
+                                    .value        = 3000};
+
+    lxw_filter_rule filter_rule3 = {.criteria     = LXW_FILTER_CRITERIA_LESS_THAN,
+                                    .value        = 8000};
+
+    worksheet_filter_column(worksheet, 0, &filter_rule1);
+    worksheet_filter_column2(worksheet, 2, &filter_rule2, &filter_rule3, LXW_FILTER_AND);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_autofilter05.c

@@ -0,0 +1,113 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_autofilter05.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    uint16_t i;
+
+    struct row {
+        char region[16];
+        char item[16];
+        int  volume;
+        char month[16];
+    };
+
+    struct row data[] = {
+        {"East",  "Apple",   9000, "July"      },
+        {"East",  "Apple",   5000, "July"      },
+        {"South", "Orange",  9000, "September" },
+        {"North", "Apple",   2000, "November"  },
+        {"West",  "Apple",   9000, "November"  },
+        {"",      "Pear",    7000, "October"   },
+        {"North", "Pear",    9000, "August"    },
+        {"West",  "Orange",  1000, "December"  },
+        {"West",  "Grape",   1000, "November"  },
+        {"South", "Pear",   10000, "April"     },
+        {"West",  "Grape",   6000, "January"   },
+        {"South", "Orange",  3000, "May"       },
+        {"North", "Apple",   3000, "December"  },
+        {"South", "Apple",   7000, "February"  },
+        {"West",  "Grape",   1000, "December"  },
+        {"East",  "Grape",   8000, "February"  },
+        {"South", "Grape",  10000, "June"      },
+        {"West",  "Pear",    7000, "December"  },
+        {"South", "Apple",   2000, "October"   },
+        {"East",  "Grape",   7000, "December"  },
+        {"North", "Grape",   6000, "April"     },
+        {"East",  "Pear",    8000, "February"  },
+        {"North", "Apple",   7000, "August"    },
+        {"North", "Orange",  7000, "July"      },
+        {"North", "Apple",   6000, "June"      },
+        {"South", "Grape",   8000, "September" },
+        {"West",  "Apple",   3000, "October"   },
+        {"South", "Orange", 10000, "November"  },
+        {"West",  "Grape",   4000, "July"      },
+        {"North", "Orange",  5000, "August"    },
+        {"East",  "Orange",  1000, "November"  },
+        {"East",  "Orange",  4000, "October"   },
+        {"North", "Grape",   5000, "August"    },
+        {"East",  "Apple",   1000, "December"  },
+        {"South", "Apple",   10000, "March"    },
+        {"East",  "Grape",   7000, "October"   },
+        {"West",  "Grape",   1000, "September" },
+        {"East",  "Grape",  10000, "October"   },
+        {"South", "Orange",  8000, "March"     },
+        {"North", "Apple",   4000, "July"      },
+        {"South", "Orange",  5000, "July"      },
+        {"West",  "Apple",   4000, "June"      },
+        {"East",  "Apple",   5000, "April"     },
+        {"North", "Pear",    3000, "August"    },
+        {"East",  "Grape",   9000, "November"  },
+        {"North", "Orange",  8000, "October"   },
+        {"East",  "Apple",  10000, "June"      },
+        {"South", "Pear",    1000, "December"  },
+        {"North", "Grape",   10000, "July"     },
+        {"East",  "Grape",   6000, "February"  }
+    };
+
+
+    /* Write the column headers. */
+    worksheet_write_string(worksheet, 0, 0, "Region", NULL);
+    worksheet_write_string(worksheet, 0, 1, "Item",   NULL);
+    worksheet_write_string(worksheet, 0, 2, "Volume", NULL);
+    worksheet_write_string(worksheet, 0, 3, "Month",  NULL);
+
+
+    lxw_row_col_options hidden = {.hidden = LXW_TRUE};
+
+
+    /* Write the row data. */
+    for (i = 0; i < sizeof(data)/sizeof(struct row); i++) {
+        worksheet_write_string(worksheet, i + 1, 0, data[i].region, NULL);
+        worksheet_write_string(worksheet, i + 1, 1, data[i].item,   NULL);
+        worksheet_write_number(worksheet, i + 1, 2, data[i].volume, NULL);
+        worksheet_write_string(worksheet, i + 1, 3, data[i].month,  NULL);
+
+        if (strcmp(data[i].region, "") == 0) {
+            /* Row matches the filter, no further action required. */
+        }
+        else {
+            /* We need to hide rows that don't match the filter. */
+            worksheet_set_row_opt(worksheet, i + 1, LXW_DEF_ROW_HEIGHT, NULL, &hidden);
+        }
+    }
+
+    worksheet_autofilter(worksheet, 0, 0, 50, 3);
+
+    lxw_filter_rule filter_rule1 = {.criteria  = LXW_FILTER_CRITERIA_BLANKS};
+
+    worksheet_filter_column(worksheet, 0, &filter_rule1);
+
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_autofilter06.c

@@ -0,0 +1,113 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_autofilter06.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    uint16_t i;
+
+    struct row {
+        char region[16];
+        char item[16];
+        int  volume;
+        char month[16];
+    };
+
+    struct row data[] = {
+        {"East",  "Apple",   9000, "July"      },
+        {"East",  "Apple",   5000, "July"      },
+        {"South", "Orange",  9000, "September" },
+        {"North", "Apple",   2000, "November"  },
+        {"West",  "Apple",   9000, "November"  },
+        {"",      "Pear",    7000, "October"   },
+        {"North", "Pear",    9000, "August"    },
+        {"West",  "Orange",  1000, "December"  },
+        {"West",  "Grape",   1000, "November"  },
+        {"South", "Pear",   10000, "April"     },
+        {"West",  "Grape",   6000, "January"   },
+        {"South", "Orange",  3000, "May"       },
+        {"North", "Apple",   3000, "December"  },
+        {"South", "Apple",   7000, "February"  },
+        {"West",  "Grape",   1000, "December"  },
+        {"East",  "Grape",   8000, "February"  },
+        {"South", "Grape",  10000, "June"      },
+        {"West",  "Pear",    7000, "December"  },
+        {"South", "Apple",   2000, "October"   },
+        {"East",  "Grape",   7000, "December"  },
+        {"North", "Grape",   6000, "April"     },
+        {"East",  "Pear",    8000, "February"  },
+        {"North", "Apple",   7000, "August"    },
+        {"North", "Orange",  7000, "July"      },
+        {"North", "Apple",   6000, "June"      },
+        {"South", "Grape",   8000, "September" },
+        {"West",  "Apple",   3000, "October"   },
+        {"South", "Orange", 10000, "November"  },
+        {"West",  "Grape",   4000, "July"      },
+        {"North", "Orange",  5000, "August"    },
+        {"East",  "Orange",  1000, "November"  },
+        {"East",  "Orange",  4000, "October"   },
+        {"North", "Grape",   5000, "August"    },
+        {"East",  "Apple",   1000, "December"  },
+        {"South", "Apple",   10000, "March"    },
+        {"East",  "Grape",   7000, "October"   },
+        {"West",  "Grape",   1000, "September" },
+        {"East",  "Grape",  10000, "October"   },
+        {"South", "Orange",  8000, "March"     },
+        {"North", "Apple",   4000, "July"      },
+        {"South", "Orange",  5000, "July"      },
+        {"West",  "Apple",   4000, "June"      },
+        {"East",  "Apple",   5000, "April"     },
+        {"North", "Pear",    3000, "August"    },
+        {"East",  "Grape",   9000, "November"  },
+        {"North", "Orange",  8000, "October"   },
+        {"East",  "Apple",  10000, "June"      },
+        {"South", "Pear",    1000, "December"  },
+        {"North", "Grape",   10000, "July"     },
+        {"East",  "Grape",   6000, "February"  }
+    };
+
+
+    /* Write the column headers. */
+    worksheet_write_string(worksheet, 0, 0, "Region", NULL);
+    worksheet_write_string(worksheet, 0, 1, "Item",   NULL);
+    worksheet_write_string(worksheet, 0, 2, "Volume", NULL);
+    worksheet_write_string(worksheet, 0, 3, "Month",  NULL);
+
+
+    lxw_row_col_options hidden = {.hidden = LXW_TRUE};
+
+
+    /* Write the row data. */
+    for (i = 0; i < sizeof(data)/sizeof(struct row); i++) {
+        worksheet_write_string(worksheet, i + 1, 0, data[i].region, NULL);
+        worksheet_write_string(worksheet, i + 1, 1, data[i].item,   NULL);
+        worksheet_write_number(worksheet, i + 1, 2, data[i].volume, NULL);
+        worksheet_write_string(worksheet, i + 1, 3, data[i].month,  NULL);
+
+        if (strcmp(data[i].region, "") != 0) {
+            /* Row matches the filter, no further action required. */
+        }
+        else {
+            /* We need to hide rows that don't match the filter. */
+            worksheet_set_row_opt(worksheet, i + 1, LXW_DEF_ROW_HEIGHT, NULL, &hidden);
+        }
+    }
+
+    worksheet_autofilter(worksheet, 0, 0, 50, 3);
+
+    lxw_filter_rule filter_rule1 = {.criteria  = LXW_FILTER_CRITERIA_NON_BLANKS};
+
+    worksheet_filter_column(worksheet, 0, &filter_rule1);
+
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_autofilter07.c

@@ -0,0 +1,114 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_autofilter07.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    uint16_t i;
+
+    struct row {
+        char region[16];
+        char item[16];
+        int  volume;
+        char month[16];
+    };
+
+    struct row data[] = {
+        {"East",  "Apple",   9000, "July"      },
+        {"East",  "Apple",   5000, "July"      },
+        {"South", "Orange",  9000, "September" },
+        {"North", "Apple",   2000, "November"  },
+        {"West",  "Apple",   9000, "November"  },
+        {"South", "Pear",    7000, "October"   },
+        {"North", "Pear",    9000, "August"    },
+        {"West",  "Orange",  1000, "December"  },
+        {"West",  "Grape",   1000, "November"  },
+        {"South", "Pear",   10000, "April"     },
+        {"West",  "Grape",   6000, "January"   },
+        {"South", "Orange",  3000, "May"       },
+        {"North", "Apple",   3000, "December"  },
+        {"South", "Apple",   7000, "February"  },
+        {"West",  "Grape",   1000, "December"  },
+        {"East",  "Grape",   8000, "February"  },
+        {"South", "Grape",  10000, "June"      },
+        {"West",  "Pear",    7000, "December"  },
+        {"South", "Apple",   2000, "October"   },
+        {"East",  "Grape",   7000, "December"  },
+        {"North", "Grape",   6000, "April"     },
+        {"East",  "Pear",    8000, "February"  },
+        {"North", "Apple",   7000, "August"    },
+        {"North", "Orange",  7000, "July"      },
+        {"North", "Apple",   6000, "June"      },
+        {"South", "Grape",   8000, "September" },
+        {"West",  "Apple",   3000, "October"   },
+        {"South", "Orange", 10000, "November"  },
+        {"West",  "Grape",   4000, "July"      },
+        {"North", "Orange",  5000, "August"    },
+        {"East",  "Orange",  1000, "November"  },
+        {"East",  "Orange",  4000, "October"   },
+        {"North", "Grape",   5000, "August"    },
+        {"East",  "Apple",   1000, "December"  },
+        {"South", "Apple",   10000, "March"    },
+        {"East",  "Grape",   7000, "October"   },
+        {"West",  "Grape",   1000, "September" },
+        {"East",  "Grape",  10000, "October"   },
+        {"South", "Orange",  8000, "March"     },
+        {"North", "Apple",   4000, "July"      },
+        {"South", "Orange",  5000, "July"      },
+        {"West",  "Apple",   4000, "June"      },
+        {"East",  "Apple",   5000, "April"     },
+        {"North", "Pear",    3000, "August"    },
+        {"East",  "Grape",   9000, "November"  },
+        {"North", "Orange",  8000, "October"   },
+        {"East",  "Apple",  10000, "June"      },
+        {"South", "Pear",    1000, "December"  },
+        {"North", "Grape",   10000, "July"     },
+        {"East",  "Grape",   6000, "February"  }
+    };
+
+
+    /* Write the column headers. */
+    worksheet_write_string(worksheet, 2, 3, "Region", NULL);
+    worksheet_write_string(worksheet, 2, 4, "Item",   NULL);
+    worksheet_write_string(worksheet, 2, 5, "Volume" , NULL);
+    worksheet_write_string(worksheet, 2, 6, "Month",  NULL);
+
+
+    lxw_row_col_options hidden = {.hidden = LXW_TRUE};
+
+
+    /* Write the row data. */
+    for (i = 0; i < sizeof(data)/sizeof(struct row); i++) {
+        worksheet_write_string(worksheet, i + 3, 3, data[i].region, NULL);
+        worksheet_write_string(worksheet, i + 3, 4, data[i].item,   NULL);
+        worksheet_write_number(worksheet, i + 3, 5, data[i].volume, NULL);
+        worksheet_write_string(worksheet, i + 3, 6, data[i].month,  NULL);
+
+        if (strcmp(data[i].region, "East") == 0) {
+            /* Row matches the filter, no further action required. */
+        }
+        else {
+            /* We need to hide rows that don't match the filter. */
+            worksheet_set_row_opt(worksheet, i + 3, LXW_DEF_ROW_HEIGHT, NULL, &hidden);
+        }
+    }
+
+    worksheet_autofilter(worksheet, 2, 3, 52, 6);
+
+    lxw_filter_rule filter_rule1 = {.criteria     = LXW_FILTER_CRITERIA_EQUAL_TO,
+                                    .value_string = "East"};
+
+    worksheet_filter_column(worksheet, 3, &filter_rule1);
+
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_autofilter08.c

@@ -0,0 +1,117 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_autofilter08.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    uint16_t i;
+
+    struct row {
+        char region[16];
+        char item[16];
+        int  volume;
+        char month[16];
+    };
+
+    struct row data[] = {
+        {"East",  "Apple",   9000, "July"      },
+        {"East",  "Apple",   5000, "July"      },
+        {"South", "Orange",  9000, "September" },
+        {"North", "Apple",   2000, "November"  },
+        {"West",  "Apple",   9000, "November"  },
+        {"",      "Pear",    7000, "October"   },
+        {"North", "Pear",    9000, "August"    },
+        {"West",  "Orange",  1000, "December"  },
+        {"West",  "Grape",   1000, "November"  },
+        {"South", "Pear",   10000, "April"     },
+        {"West",  "Grape",   6000, "January"   },
+        {"South", "Orange",  3000, "May"       },
+        {"North", "Apple",   3000, "December"  },
+        {"South", "Apple",   7000, "February"  },
+        {"West",  "Grape",   1000, "December"  },
+        {"East",  "Grape",   8000, "February"  },
+        {"South", "Grape",  10000, "June"      },
+        {"West",  "Pear",    7000, "December"  },
+        {"South", "Apple",   2000, "October"   },
+        {"East",  "Grape",   7000, "December"  },
+        {"North", "Grape",   6000, "April"     },
+        {"East",  "Pear",    8000, "February"  },
+        {"North", "Apple",   7000, "August"    },
+        {"North", "Orange",  7000, "July"      },
+        {"North", "Apple",   6000, "June"      },
+        {"South", "Grape",   8000, "September" },
+        {"West",  "Apple",   3000, "October"   },
+        {"South", "Orange", 10000, "November"  },
+        {"West",  "Grape",   4000, "July"      },
+        {"North", "Orange",  5000, "August"    },
+        {"East",  "Orange",  1000, "November"  },
+        {"East",  "Orange",  4000, "October"   },
+        {"North", "Grape",   5000, "August"    },
+        {"East",  "Apple",   1000, "December"  },
+        {"South", "Apple",   10000, "March"    },
+        {"East",  "Grape",   7000, "October"   },
+        {"West",  "Grape",   1000, "September" },
+        {"East",  "Grape",  10000, "October"   },
+        {"South", "Orange",  8000, "March"     },
+        {"North", "Apple",   4000, "July"      },
+        {"South", "Orange",  5000, "July"      },
+        {"West",  "Apple",   4000, "June"      },
+        {"East",  "Apple",   5000, "April"     },
+        {"North", "Pear",    3000, "August"    },
+        {"East",  "Grape",   9000, "November"  },
+        {"North", "Orange",  8000, "October"   },
+        {"East",  "Apple",  10000, "June"      },
+        {"South", "Pear",    1000, "December"  },
+        {"North", "Grape",   10000, "July"     },
+        {"East",  "Grape",   6000, "February"  }
+    };
+
+
+    /* Write the column headers. */
+    worksheet_write_string(worksheet, 0, 0, "Region", NULL);
+    worksheet_write_string(worksheet, 0, 1, "Item",   NULL);
+    worksheet_write_string(worksheet, 0, 2, "Volume" , NULL);
+    worksheet_write_string(worksheet, 0, 3, "Month",  NULL);
+
+
+    lxw_row_col_options hidden = {.hidden = LXW_TRUE};
+
+
+    /* Write the row data. */
+    for (i = 0; i < sizeof(data)/sizeof(struct row); i++) {
+        worksheet_write_string(worksheet, i + 1, 0, data[i].region, NULL);
+        worksheet_write_string(worksheet, i + 1, 1, data[i].item,   NULL);
+        worksheet_write_number(worksheet, i + 1, 2, data[i].volume, NULL);
+        worksheet_write_string(worksheet, i + 1, 3, data[i].month,  NULL);
+
+        if (strcmp(data[i].region, "North") == 0 || strcmp(data[i].region, "") == 0) {
+            /* Row matches the filter, no further action required. */
+        }
+        else {
+            /* We need to hide rows that don't match the filter. */
+            worksheet_set_row_opt(worksheet, i + 1, LXW_DEF_ROW_HEIGHT, NULL, &hidden);
+        }
+    }
+
+    worksheet_autofilter(worksheet, 0, 0, 50, 3);
+
+    lxw_filter_rule filter_rule1 = {.criteria     = LXW_FILTER_CRITERIA_EQUAL_TO,
+                                    .value_string = "North"};
+
+    lxw_filter_rule filter_rule2 = {.criteria     = LXW_FILTER_CRITERIA_BLANKS};
+
+
+    worksheet_filter_column2(worksheet, 0, &filter_rule1, &filter_rule2, LXW_FILTER_OR);
+
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_autofilter09.c

@@ -0,0 +1,115 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_autofilter09.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    uint16_t i;
+
+    struct row {
+        char region[16];
+        char item[16];
+        int  volume;
+        char month[16];
+    };
+
+    struct row data[] = {
+        {"East",  "Apple",   9000, "July"      },
+        {"East",  "Apple",   5000, "July"      },
+        {"South", "Orange",  9000, "September" },
+        {"North", "Apple",   2000, "November"  },
+        {"West",  "Apple",   9000, "November"  },
+        {"",      "Pear",    7000, "October"   },
+        {"North", "Pear",    9000, "August"    },
+        {"West",  "Orange",  1000, "December"  },
+        {"West",  "Grape",   1000, "November"  },
+        {"South", "Pear",   10000, "April"     },
+        {"West",  "Grape",   6000, "January"   },
+        {"South", "Orange",  3000, "May"       },
+        {"North", "Apple",   3000, "December"  },
+        {"South", "Apple",   7000, "February"  },
+        {"West",  "Grape",   1000, "December"  },
+        {"East",  "Grape",   8000, "February"  },
+        {"South", "Grape",  10000, "June"      },
+        {"West",  "Pear",    7000, "December"  },
+        {"South", "Apple",   2000, "October"   },
+        {"East",  "Grape",   7000, "December"  },
+        {"North", "Grape",   6000, "April"     },
+        {"East",  "Pear",    8000, "February"  },
+        {"North", "Apple",   7000, "August"    },
+        {"North", "Orange",  7000, "July"      },
+        {"North", "Apple",   6000, "June"      },
+        {"South", "Grape",   8000, "September" },
+        {"West",  "Apple",   3000, "October"   },
+        {"South", "Orange", 10000, "November"  },
+        {"West",  "Grape",   4000, "July"      },
+        {"North", "Orange",  5000, "August"    },
+        {"East",  "Orange",  1000, "November"  },
+        {"East",  "Orange",  4000, "October"   },
+        {"North", "Grape",   5000, "August"    },
+        {"East",  "Apple",   1000, "December"  },
+        {"South", "Apple",   10000, "March"    },
+        {"East",  "Grape",   7000, "October"   },
+        {"West",  "Grape",   1000, "September" },
+        {"East",  "Grape",  10000, "October"   },
+        {"South", "Orange",  8000, "March"     },
+        {"North", "Apple",   4000, "July"      },
+        {"South", "Orange",  5000, "July"      },
+        {"West",  "Apple",   4000, "June"      },
+        {"East",  "Apple",   5000, "April"     },
+        {"North", "Pear",    3000, "August"    },
+        {"East",  "Grape",   9000, "November"  },
+        {"North", "Orange",  8000, "October"   },
+        {"East",  "Apple",  10000, "June"      },
+        {"South", "Pear",    1000, "December"  },
+        {"North", "Grape",   10000, "July"     },
+        {"East",  "Grape",   6000, "February"  }
+    };
+
+
+    /* Write the column headers. */
+    worksheet_write_string(worksheet, 0, 0, "Region", NULL);
+    worksheet_write_string(worksheet, 0, 1, "Item",   NULL);
+    worksheet_write_string(worksheet, 0, 2, "Volume", NULL);
+    worksheet_write_string(worksheet, 0, 3, "Month",  NULL);
+
+
+    lxw_row_col_options hidden = {.hidden = LXW_TRUE};
+
+
+    /* Write the row data. */
+    for (i = 0; i < sizeof(data)/sizeof(struct row); i++) {
+        worksheet_write_string(worksheet, i + 1, 0, data[i].region, NULL);
+        worksheet_write_string(worksheet, i + 1, 1, data[i].item,   NULL);
+        worksheet_write_number(worksheet, i + 1, 2, data[i].volume , NULL);
+        worksheet_write_string(worksheet, i + 1, 3, data[i].month,  NULL);
+
+        if (strcmp(data[i].region, "East")  == 0  ||
+            strcmp(data[i].region, "North") == 0 ||
+            strcmp(data[i].region, "South") == 0) {
+            /* Row matches the filter, no further action required. */
+        }
+        else {
+            /* We need to hide rows that don't match the filter. */
+            worksheet_set_row_opt(worksheet, i + 1, LXW_DEF_ROW_HEIGHT, NULL, &hidden);
+        }
+    }
+
+    worksheet_autofilter(worksheet, 0, 0, 50, 3);
+
+    char* list[] = {"East", "North", "South", NULL};
+
+    worksheet_filter_list(worksheet, 0, list);
+
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_autofilter10.c

@@ -0,0 +1,116 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_autofilter10.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    uint16_t i;
+
+    struct row {
+        char region[16];
+        char item[16];
+        int  volume;
+        char month[16];
+    };
+
+    struct row data[] = {
+        {"East",  "Apple",   9000, "July"      },
+        {"East",  "Apple",   5000, "July"      },
+        {"South", "Orange",  9000, "September" },
+        {"North", "Apple",   2000, "November"  },
+        {"West",  "Apple",   9000, "November"  },
+        {"",      "Pear",    7000, "October"   },
+        {"North", "Pear",    9000, "August"    },
+        {"West",  "Orange",  1000, "December"  },
+        {"West",  "Grape",   1000, "November"  },
+        {"South", "Pear",   10000, "April"     },
+        {"West",  "Grape",   6000, "January"   },
+        {"South", "Orange",  3000, "May"       },
+        {"North", "Apple",   3000, "December"  },
+        {"South", "Apple",   7000, "February"  },
+        {"West",  "Grape",   1000, "December"  },
+        {"East",  "Grape",   8000, "February"  },
+        {"South", "Grape",  10000, "June"      },
+        {"West",  "Pear",    7000, "December"  },
+        {"South", "Apple",   2000, "October"   },
+        {"East",  "Grape",   7000, "December"  },
+        {"North", "Grape",   6000, "April"     },
+        {"East",  "Pear",    8000, "February"  },
+        {"North", "Apple",   7000, "August"    },
+        {"North", "Orange",  7000, "July"      },
+        {"North", "Apple",   6000, "June"      },
+        {"South", "Grape",   8000, "September" },
+        {"West",  "Apple",   3000, "October"   },
+        {"South", "Orange", 10000, "November"  },
+        {"West",  "Grape",   4000, "July"      },
+        {"North", "Orange",  5000, "August"    },
+        {"East",  "Orange",  1000, "November"  },
+        {"East",  "Orange",  4000, "October"   },
+        {"North", "Grape",   5000, "August"    },
+        {"East",  "Apple",   1000, "December"  },
+        {"South", "Apple",   10000, "March"    },
+        {"East",  "Grape",   7000, "October"   },
+        {"West",  "Grape",   1000, "September" },
+        {"East",  "Grape",  10000, "October"   },
+        {"South", "Orange",  8000, "March"     },
+        {"North", "Apple",   4000, "July"      },
+        {"South", "Orange",  5000, "July"      },
+        {"West",  "Apple",   4000, "June"      },
+        {"East",  "Apple",   5000, "April"     },
+        {"North", "Pear",    3000, "August"    },
+        {"East",  "Grape",   9000, "November"  },
+        {"North", "Orange",  8000, "October"   },
+        {"East",  "Apple",  10000, "June"      },
+        {"South", "Pear",    1000, "December"  },
+        {"North", "Grape",   10000, "July"     },
+        {"East",  "Grape",   6000, "February"  }
+    };
+
+
+    /* Write the column headers. */
+    worksheet_write_string(worksheet, 0, 0, "Region", NULL);
+    worksheet_write_string(worksheet, 0, 1, "Item",   NULL);
+    worksheet_write_string(worksheet, 0, 2, "Volume", NULL);
+    worksheet_write_string(worksheet, 0, 3, "Month",  NULL);
+
+
+    lxw_row_col_options hidden = {.hidden = LXW_TRUE};
+
+
+    /* Write the row data. */
+    for (i = 0; i < sizeof(data)/sizeof(struct row); i++) {
+        worksheet_write_string(worksheet, i + 1, 0, data[i].region, NULL);
+        worksheet_write_string(worksheet, i + 1, 1, data[i].item,   NULL);
+        worksheet_write_number(worksheet, i + 1, 2, data[i].volume , NULL);
+        worksheet_write_string(worksheet, i + 1, 3, data[i].month,  NULL);
+
+        if (strcmp(data[i].region, "East")  == 0 ||
+            strcmp(data[i].region, "North") == 0 ||
+            strcmp(data[i].region, "South") == 0 ||
+            strcmp(data[i].region, "") == 0) {
+            /* Row matches the filter, no further action required. */
+        }
+        else {
+            /* We need to hide rows that don't match the filter. */
+            worksheet_set_row_opt(worksheet, i + 1, LXW_DEF_ROW_HEIGHT, NULL, &hidden);
+        }
+    }
+
+    worksheet_autofilter(worksheet, 0, 0, 50, 3);
+
+    char* list[] = {"East", "North", "South", "Blanks", NULL};
+
+    worksheet_filter_list(worksheet, 0, list);
+
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_autofilter11.c

@@ -0,0 +1,116 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_autofilter11.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    uint16_t i;
+
+    struct row {
+        char region[16];
+        char item[16];
+        int  volume;
+        char month[16];
+    };
+
+    struct row data[] = {
+        {"East",  "Apple",   9000, "July"      },
+        {"East",  "Apple",   5000, "July"      },
+        {"South", "Orange",  9000, "September" },
+        {"North", "Apple",   2000, "November"  },
+        {"West",  "Apple",   9000, "November"  },
+        {"South", "Pear",    7000, "October"   },
+        {"North", "Pear",    9000, "August"    },
+        {"West",  "Orange",  1000, "December"  },
+        {"West",  "Grape",   1000, "November"  },
+        {"South", "Pear",   10000, "April"     },
+        {"West",  "Grape",   6000, "January"   },
+        {"South", "Orange",  3000, "May"       },
+        {"North", "Apple",   3000, "December"  },
+        {"South", "Apple",   7000, "February"  },
+        {"West",  "Grape",   1000, "December"  },
+        {"East",  "Grape",   8000, "February"  },
+        {"South", "Grape",  10000, "June"      },
+        {"West",  "Pear",    7000, "December"  },
+        {"South", "Apple",   2000, "October"   },
+        {"East",  "Grape",   7000, "December"  },
+        {"North", "Grape",   6000, "April"     },
+        {"East",  "Pear",    8000, "February"  },
+        {"North", "Apple",   7000, "August"    },
+        {"North", "Orange",  7000, "July"      },
+        {"North", "Apple",   6000, "June"      },
+        {"South", "Grape",   8000, "September" },
+        {"West",  "Apple",   3000, "October"   },
+        {"South", "Orange", 10000, "November"  },
+        {"West",  "Grape",   4000, "July"      },
+        {"North", "Orange",  5000, "August"    },
+        {"East",  "Orange",  1000, "November"  },
+        {"East",  "Orange",  4000, "October"   },
+        {"North", "Grape",   5000, "August"    },
+        {"East",  "Apple",   1000, "December"  },
+        {"South", "Apple",   10000, "March"    },
+        {"East",  "Grape",   7000, "October"   },
+        {"West",  "Grape",   1000, "September" },
+        {"East",  "Grape",  10000, "October"   },
+        {"South", "Orange",  8000, "March"     },
+        {"North", "Apple",   4000, "July"      },
+        {"South", "Orange",  5000, "July"      },
+        {"West",  "Apple",   4000, "June"      },
+        {"East",  "Apple",   5000, "April"     },
+        {"North", "Pear",    3000, "August"    },
+        {"East",  "Grape",   9000, "November"  },
+        {"North", "Orange",  8000, "October"   },
+        {"East",  "Apple",  10000, "June"      },
+        {"South", "Pear",    1000, "December"  },
+        {"North", "Grape",   10000, "July"     },
+        {"East",  "Grape",   6000, "February"  }
+    };
+
+
+    /* Write the column headers. */
+    worksheet_write_string(worksheet, 0, 0, "Region", NULL);
+    worksheet_write_string(worksheet, 0, 1, "Item",   NULL);
+    worksheet_write_string(worksheet, 0, 2, "Volume" , NULL);
+    worksheet_write_string(worksheet, 0, 3, "Month",  NULL);
+
+
+    lxw_row_col_options hidden = {.hidden = LXW_TRUE};
+
+
+    /* Write the row data. */
+    for (i = 0; i < sizeof(data)/sizeof(struct row); i++) {
+        worksheet_write_string(worksheet, i + 1, 0, data[i].region, NULL);
+        worksheet_write_string(worksheet, i + 1, 1, data[i].item,   NULL);
+        worksheet_write_number(worksheet, i + 1, 2, data[i].volume, NULL);
+        worksheet_write_string(worksheet, i + 1, 3, data[i].month,  NULL);
+
+        if (data[i].volume == 3000 ||
+            data[i].volume == 5000 ||
+            data[i].volume == 8000)
+        {
+            /* Row matches the filter, no further action required. */
+        }
+        else {
+            /* We need to hide rows that don't match the filter. */
+            worksheet_set_row_opt(worksheet, i + 1, LXW_DEF_ROW_HEIGHT, NULL, &hidden);
+        }
+    }
+
+    worksheet_autofilter(worksheet, 0, 0, 50, 3);
+
+
+    char* list[] = {"3000", "5000", "8000", NULL};
+
+    worksheet_filter_list(worksheet, 2, list);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_background01.c

@@ -0,0 +1,20 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_background01.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+
+    worksheet_insert_image(worksheet, CELL("E9"), "images/logo.jpg");
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_background02.c

@@ -0,0 +1,20 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_background02.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+
+    worksheet_set_background(worksheet, "images/logo.jpg");
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_background03.c

@@ -0,0 +1,21 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_background03.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+
+    worksheet_insert_image(worksheet, CELL("E9"), "images/logo.jpg");
+    worksheet_set_background(worksheet, "images/logo.jpg");
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_background04.c

@@ -0,0 +1,22 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_background04.xlsx");
+    lxw_worksheet *worksheet1 = workbook_add_worksheet(workbook, NULL);
+    lxw_worksheet *worksheet2 = workbook_add_worksheet(workbook, NULL);
+
+    worksheet_set_background(worksheet1, "images/logo.jpg");
+    worksheet_set_background(worksheet2, "images/logo.jpg");
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_background05.c

@@ -0,0 +1,22 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_background05.xlsx");
+    lxw_worksheet *worksheet1 = workbook_add_worksheet(workbook, NULL);
+    lxw_worksheet *worksheet2 = workbook_add_worksheet(workbook, NULL);
+
+    worksheet_set_background(worksheet1, "images/logo.jpg");
+    worksheet_set_background(worksheet2, "images/red.jpg");
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_background06.c

@@ -0,0 +1,24 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_background06.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+
+    worksheet_insert_image(worksheet, CELL("E9"), "images/logo.jpg");
+    worksheet_set_background(worksheet, "images/logo.jpg");
+
+    lxw_header_footer_options header_options = {.image_center = "images/blue.jpg"};
+    worksheet_set_header_opt(worksheet, "&C&G", &header_options);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_background07.c

@@ -0,0 +1,28 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_background07.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+
+    worksheet_insert_image(worksheet, CELL("E9"), "images/logo.jpg");
+    worksheet_set_background(worksheet, "images/logo.jpg");
+
+    lxw_header_footer_options header_options = {.image_center = "images/blue.jpg"};
+    worksheet_set_header_opt(worksheet, "&C&G", &header_options);
+
+    worksheet_write_string(worksheet, CELL("A1"), "Foo" , NULL);
+    worksheet_write_comment(worksheet, CELL("B2"), "Some text");
+    worksheet_set_comments_author(worksheet, "John");
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_background52.c

@@ -0,0 +1,368 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+unsigned char image_buffer[] = {
+    0xff, 0xd8, 0xff, 0xe0, 0x00, 0x10, 0x4a, 0x46, 0x49, 0x46, 0x00, 0x01,
+    0x01, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00, 0xff, 0xdb, 0x00, 0x43,
+    0x00, 0x06, 0x04, 0x05, 0x06, 0x05, 0x04, 0x06, 0x06, 0x05, 0x06, 0x07,
+    0x07, 0x06, 0x08, 0x0a, 0x10, 0x0a, 0x0a, 0x09, 0x09, 0x0a, 0x14, 0x0e,
+    0x0f, 0x0c, 0x10, 0x17, 0x14, 0x18, 0x18, 0x17, 0x14, 0x16, 0x16, 0x1a,
+    0x1d, 0x25, 0x1f, 0x1a, 0x1b, 0x23, 0x1c, 0x16, 0x16, 0x20, 0x2c, 0x20,
+    0x23, 0x26, 0x27, 0x29, 0x2a, 0x29, 0x19, 0x1f, 0x2d, 0x30, 0x2d, 0x28,
+    0x30, 0x25, 0x28, 0x29, 0x28, 0xff, 0xdb, 0x00, 0x43, 0x01, 0x07, 0x07,
+    0x07, 0x0a, 0x08, 0x0a, 0x13, 0x0a, 0x0a, 0x13, 0x28, 0x1a, 0x16, 0x1a,
+    0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28,
+    0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28,
+    0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28,
+    0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28,
+    0x28, 0x28, 0xff, 0xc0, 0x00, 0x11, 0x08, 0x00, 0x50, 0x00, 0xc8, 0x03,
+    0x01, 0x22, 0x00, 0x02, 0x11, 0x01, 0x03, 0x11, 0x01, 0xff, 0xc4, 0x00,
+    0x1c, 0x00, 0x00, 0x02, 0x02, 0x03, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05, 0x04, 0x06, 0x02, 0x03,
+    0x07, 0x01, 0x08, 0xff, 0xc4, 0x00, 0x49, 0x10, 0x00, 0x01, 0x03, 0x03,
+    0x01, 0x03, 0x08, 0x07, 0x04, 0x06, 0x05, 0x0d, 0x00, 0x00, 0x00, 0x00,
+    0x01, 0x02, 0x03, 0x04, 0x00, 0x05, 0x11, 0x06, 0x12, 0x21, 0x31, 0x07,
+    0x13, 0x15, 0x41, 0x51, 0x55, 0x94, 0xd1, 0x14, 0x36, 0x61, 0x71, 0x74,
+    0x81, 0xb2, 0x32, 0x91, 0xb1, 0xc1, 0x22, 0x33, 0x34, 0x72, 0xa1, 0xa2,
+    0x16, 0x23, 0x52, 0x73, 0xc2, 0x24, 0x35, 0x42, 0x43, 0x54, 0x62, 0x64,
+    0x65, 0x82, 0x92, 0x93, 0xd2, 0xf0, 0xff, 0xc4, 0x00, 0x1b, 0x01, 0x00,
+    0x02, 0x03, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x01, 0x03, 0x04, 0x05, 0x06, 0x02, 0x07, 0xff,
+    0xc4, 0x00, 0x2b, 0x11, 0x00, 0x02, 0x02, 0x01, 0x03, 0x03, 0x03, 0x03,
+    0x04, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x03,
+    0x11, 0x04, 0x12, 0x21, 0x05, 0x13, 0x31, 0x06, 0x41, 0x51, 0x61, 0x81,
+    0xe1, 0x22, 0x71, 0x91, 0xc1, 0x52, 0xa1, 0xd1, 0xff, 0xda, 0x00, 0x0c,
+    0x03, 0x01, 0x00, 0x02, 0x11, 0x03, 0x11, 0x00, 0x3f, 0x00, 0xe8, 0x9a,
+    0x7a, 0xc9, 0x6a, 0x55, 0x82, 0xd8, 0xa5, 0x5b, 0x20, 0x95, 0x18, 0xad,
+    0x12, 0x4c, 0x74, 0x64, 0x9d, 0x81, 0xec, 0xa6, 0x1d, 0x07, 0x69, 0xee,
+    0xb8, 0x1e, 0x1d, 0x1e, 0x54, 0x69, 0xcf, 0x57, 0xad, 0x7f, 0x0a, 0xd7,
+    0xd0, 0x29, 0x8d, 0x00, 0x2e, 0xe8, 0x3b, 0x4f, 0x75, 0xc0, 0xf0, 0xe8,
+    0xf2, 0xa3, 0xa0, 0xed, 0x3d, 0xd7, 0x03, 0xc3, 0xa3, 0xca, 0x98, 0xd5,
+    0x2b, 0x94, 0x4b, 0xb4, 0xc8, 0xca, 0x87, 0x6e, 0xb7, 0x2d, 0x4d, 0xbb,
+    0x27, 0xed, 0x29, 0x27, 0x04, 0x8c, 0xe0, 0x00, 0x7a, 0xb7, 0xd4, 0x95,
+    0x56, 0xed, 0x92, 0x8a, 0x23, 0xb6, 0xc5, 0x54, 0x5c, 0x98, 0xfd, 0xfb,
+    0x65, 0x85, 0x8f, 0xd7, 0xc2, 0xb5, 0xb7, 0xfb, 0xed, 0x36, 0x3f, 0x11,
+    0x51, 0x83, 0x7a, 0x58, 0xab, 0x64, 0x22, 0xc8, 0x55, 0xd8, 0x03, 0x59,
+    0xaa, 0x7e, 0xbc, 0xe4, 0xf6, 0x6e, 0x97, 0xb5, 0x31, 0x71, 0x91, 0x39,
+    0xa9, 0x61, 0xc7, 0x03, 0x6e, 0x84, 0xa4, 0x82, 0x85, 0x10, 0x4f, 0x12,
+    0x7f, 0x48, 0x6e, 0xe3, 0xbb, 0xdd, 0x54, 0x23, 0x57, 0xab, 0xd0, 0xc2,
+    0x71, 0xdd, 0x19, 0x64, 0xa5, 0x3d, 0x6c, 0xe1, 0x2d, 0xb2, 0x8e, 0x0e,
+    0xee, 0xcd, 0xaa, 0xc6, 0xf8, 0x25, 0x98, 0x16, 0xd7, 0x00, 0xfe, 0xc3,
+    0x28, 0x3f, 0x80, 0xad, 0x9d, 0x07, 0x69, 0xee, 0xb8, 0x1e, 0x1d, 0x1e,
+    0x55, 0xc1, 0x98, 0x90, 0xf4, 0x67, 0x92, 0xec, 0x77, 0x56, 0xd3, 0xa9,
+    0xde, 0x14, 0x85, 0x60, 0x8a, 0xec, 0xda, 0x0a, 0xf8, 0xed, 0xf2, 0xce,
+    0x57, 0x2b, 0x06, 0x53, 0x0a, 0xe6, 0xdc, 0x50, 0xdd, 0xb5, 0xbb, 0x21,
+    0x58, 0xff, 0x00, 0xee, 0x15, 0x06, 0xa3, 0x48, 0xea, 0x5b, 0x93, 0xca,
+    0x26, 0xa3, 0x54, 0xad, 0x7b, 0x5a, 0xc3, 0x19, 0xf4, 0x1d, 0xa7, 0xba,
+    0xe0, 0x78, 0x74, 0x79, 0x51, 0xd0, 0x76, 0x9e, 0xeb, 0x81, 0xe1, 0xd1,
+    0xe5, 0x4c, 0x68, 0xaa, 0x85, 0xb1, 0x77, 0x41, 0xda, 0x7b, 0xae, 0x07,
+    0x87, 0x47, 0x95, 0x1d, 0x07, 0x69, 0xee, 0xb8, 0x1e, 0x1d, 0x1e, 0x54,
+    0xc6, 0xbc, 0x5a, 0xd2, 0x81, 0x95, 0xa8, 0x24, 0x76, 0x93, 0x8a, 0x00,
+    0x5f, 0xd0, 0x76, 0x9e, 0xeb, 0x81, 0xe1, 0xd1, 0xe5, 0x47, 0x41, 0xda,
+    0x7b, 0xae, 0x07, 0x87, 0x47, 0x95, 0x31, 0x1b, 0xc6, 0xea, 0x32, 0x33,
+    0x8c, 0xef, 0xa0, 0x05, 0xdd, 0x07, 0x69, 0xee, 0xb8, 0x1e, 0x1d, 0x1e,
+    0x54, 0x74, 0x1d, 0xa7, 0xba, 0xe0, 0x78, 0x74, 0x79, 0x53, 0x1a, 0x81,
+    0x7e, 0x96, 0xe4, 0x0b, 0x34, 0xd9, 0x4c, 0x6c, 0x97, 0x5a, 0x68, 0xad,
+    0x3b, 0x43, 0x23, 0x22, 0x80, 0x31, 0xe8, 0x3b, 0x4f, 0x75, 0xc0, 0xf0,
+    0xe8, 0xf2, 0xa8, 0x36, 0xd6, 0x34, 0xf5, 0xc9, 0xe9, 0x4d, 0xc3, 0xb7,
+    0xc2, 0x70, 0xc6, 0x56, 0xc3, 0x87, 0xd1, 0x52, 0x00, 0x3b, 0xf7, 0x6f,
+    0x1e, 0xca, 0x97, 0xa5, 0xa6, 0x3d, 0x3e, 0xc1, 0x0e, 0x54, 0xa5, 0x05,
+    0x3c, 0xea, 0x49, 0x51, 0x03, 0x1d, 0x67, 0xaa, 0xab, 0xfc, 0x9d, 0xfe,
+    0xd9, 0xa8, 0x3e, 0x2b, 0xf3, 0x55, 0x00, 0x58, 0xfa, 0x0e, 0xd3, 0xdd,
+    0x70, 0x3c, 0x3a, 0x3c, 0xa8, 0xe8, 0x3b, 0x4f, 0x75, 0xc0, 0xf0, 0xe8,
+    0xf2, 0xa6, 0x34, 0x50, 0x02, 0xee, 0x83, 0xb4, 0xf7, 0x5c, 0x0f, 0x0e,
+    0x8f, 0x2a, 0x3a, 0x0e, 0xd3, 0xdd, 0x70, 0x3c, 0x3a, 0x3c, 0xa9, 0x82,
+    0x56, 0x95, 0x12, 0x12, 0xa0, 0x48, 0xdc, 0x40, 0x3c, 0x2b, 0xda, 0x00,
+    0x5d, 0xd0, 0x76, 0x9e, 0xeb, 0x81, 0xe1, 0xd1, 0xe5, 0x47, 0x41, 0xda,
+    0x7b, 0xae, 0x07, 0x87, 0x47, 0x95, 0x4f, 0x5b, 0x88, 0x6f, 0x1b, 0x6b,
+    0x4a, 0x73, 0xc3, 0x27, 0x15, 0x95, 0x00, 0x57, 0xb5, 0x0d, 0x92, 0xd4,
+    0x9b, 0x05, 0xcd, 0x49, 0xb6, 0x41, 0x0a, 0x11, 0x5d, 0x20, 0x88, 0xe8,
+    0xc8, 0x3b, 0x07, 0xd9, 0x45, 0x30, 0xd4, 0x7e, 0xaf, 0x5d, 0x3e, 0x15,
+    0xdf, 0xa0, 0xd1, 0x40, 0x06, 0x9c, 0xf5, 0x7a, 0xd7, 0xf0, 0xad, 0x7d,
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+    0x29, 0xd7, 0x3a, 0x81, 0x76, 0x68, 0x6d, 0xb5, 0x10, 0x8f, 0x4b, 0x7f,
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+    0xb6, 0xa1, 0xa4, 0x49, 0xd1, 0x65, 0xc1, 0x44, 0xc8, 0xef, 0xa1, 0x71,
+    0x56, 0x9d, 0xb0, 0xe0, 0x38, 0x18, 0xeb, 0xcf, 0x66, 0x3f, 0x85, 0x25,
+    0x3a, 0xce, 0xce, 0x0e, 0xd7, 0x39, 0x23, 0xd1, 0x76, 0xb6, 0x3d, 0x2b,
+    0xd1, 0xd7, 0xcc, 0xe7, 0x38, 0xfb, 0x78, 0xc7, 0xcf, 0x85, 0x73, 0xe4,
+    0xc8, 0x7a, 0x3f, 0x27, 0x9a, 0x85, 0x98, 0xc5, 0x42, 0x32, 0x6e, 0x25,
+    0xa4, 0x90, 0x78, 0x20, 0x91, 0x90, 0x3d, 0x9c, 0x3e, 0xfa, 0xea, 0x4a,
+    0x8d, 0x11, 0x5a, 0x74, 0xc7, 0x08, 0x4f, 0xa1, 0x18, 0xdb, 0x21, 0x38,
+    0xdd, 0xb1, 0xb3, 0xe5, 0x5e, 0xe5, 0x5c, 0x61, 0xe7, 0xe4, 0x8e, 0x36,
+    0x4a, 0x7e, 0x3e, 0x0c, 0xa6, 0xde, 0x21, 0x43, 0x76, 0x02, 0x1e, 0x7b,
+    0x7c, 0xe5, 0x86, 0xd8, 0x29, 0x05, 0x49, 0x59, 0x3c, 0x37, 0x8d, 0xdd,
+    0x62, 0x8b, 0xc5, 0xe6, 0x0d, 0x9d, 0x31, 0xcc, 0xf7, 0xb9, 0xbe, 0x7d,
+    0xc0, 0xd3, 0x7b, 0x89, 0xc9, 0x3f, 0x80, 0xf6, 0xd7, 0x3b, 0x8f, 0x1e,
+    0x44, 0xde, 0x48, 0xe3, 0xc8, 0x05, 0x5e, 0x91, 0x01, 0xc3, 0x21, 0x85,
+    0x75, 0x80, 0x85, 0x9f, 0xc0, 0x6d, 0x7d, 0xc2, 0xa6, 0x5f, 0x9b, 0x4e,
+    0xb3, 0x6e, 0x53, 0xac, 0x0d, 0xa6, 0xe1, 0xdb, 0x52, 0xeb, 0x40, 0x75,
+    0x3e, 0xe6, 0x17, 0x8f, 0x7e, 0xca, 0x00, 0xff, 0x00, 0xaa, 0x9f, 0x66,
+    0x39, 0xe5, 0xf1, 0xee, 0x2e, 0xec, 0xb1, 0xc2, 0xe7, 0xd8, 0xbf, 0x4f,
+    0x9c, 0xc4, 0x04, 0xb0, 0xa9, 0x0a, 0x23, 0x9e, 0x79, 0x2c, 0x20, 0x01,
+    0x92, 0x56, 0xa3, 0x80, 0x2a, 0x25, 0xca, 0xff, 0x00, 0x06, 0x04, 0xaf,
+    0x45, 0x59, 0x79, 0xe9, 0x5b, 0x3b, 0x65, 0x98, 0xec, 0xa9, 0xd5, 0x25,
+    0x3d, 0xa4, 0x24, 0x1c, 0x0f, 0x7d, 0x57, 0x2c, 0x77, 0x1f, 0xe9, 0x24,
+    0xdd, 0x3a, 0xa2, 0x76, 0x84, 0x58, 0xaa, 0x96, 0xff, 0x00, 0x67, 0x3b,
+    0xfa, 0xa4, 0xfc, 0xf2, 0x16, 0x6a, 0x26, 0x91, 0xe9, 0x77, 0xae, 0xba,
+    0x8e, 0x54, 0x23, 0x03, 0x9d, 0x5c, 0xe5, 0x36, 0xe7, 0xa4, 0x85, 0x95,
+    0x00, 0x9c, 0xec, 0x81, 0xb3, 0xd4, 0x01, 0xc7, 0xca, 0x92, 0xa9, 0x2c,
+    0xee, 0xf6, 0x3d, 0x77, 0x5b, 0xc6, 0xdf, 0x72, 0xf1, 0x6c, 0xb8, 0xc4,
+    0xba, 0x43, 0x4c, 0xa8, 0x2f, 0x25, 0xd6, 0x15, 0x91, 0xb4, 0x37, 0x60,
+    0x8e, 0x20, 0x83, 0xbc, 0x1f, 0x61, 0xa5, 0x87, 0x55, 0xdb, 0x57, 0x30,
+    0x46, 0x86, 0x64, 0x4d, 0x73, 0x9c, 0x0d, 0xa9, 0x51, 0x99, 0x52, 0xd0,
+    0x92, 0x4e, 0x37, 0xab, 0xec, 0xff, 0x00, 0x1a, 0x5f, 0x6f, 0xb3, 0xcc,
+    0xb4, 0x5b, 0x35, 0x23, 0xd3, 0x1d, 0x61, 0x5e, 0x98, 0x1c, 0x90, 0x10,
+    0xc6, 0xd0, 0x4a, 0x14, 0x52, 0x76, 0xb8, 0xf6, 0xee, 0xa9, 0x5c, 0x9c,
+    0x24, 0x27, 0x45, 0x5a, 0xf0, 0x31, 0x94, 0x28, 0xff, 0x00, 0x3a, 0xab,
+    0xcb, 0x8c, 0x52, 0x6f, 0xc8, 0xd4, 0xa4, 0xda, 0x5e, 0x06, 0x37, 0x4b,
+    0xe4, 0x2b, 0x6c, 0x84, 0x47, 0x79, 0x4e, 0xbb, 0x29, 0x69, 0xda, 0x4b,
+    0x0c, 0x34, 0xa7, 0x5c, 0x29, 0xed, 0xc2, 0x41, 0xc0, 0xf7, 0xd6, 0xeb,
+    0x4d, 0xd2, 0x25, 0xda, 0x31, 0x7e, 0x0b, 0xa1, 0xc4, 0x05, 0x14, 0x28,
+    0x10, 0x52, 0xa4, 0x28, 0x71, 0x0a, 0x07, 0x78, 0x3e, 0xfa, 0xa5, 0x58,
+    0xba, 0x55, 0xfd, 0x63, 0xa9, 0xe4, 0x42, 0x30, 0xb9, 0xe4, 0x3c, 0x96,
+    0x4f, 0xa5, 0x05, 0x12, 0x10, 0x33, 0xb3, 0xb3, 0xb3, 0xd4, 0x40, 0xfe,
+    0x14, 0xc1, 0x9b, 0x65, 0xce, 0xcc, 0xc6, 0xa7, 0xba, 0x3c, 0xf4, 0x72,
+    0xec, 0xa8, 0xe5, 0xe4, 0x37, 0x1f, 0x68, 0x04, 0x38, 0x94, 0x2b, 0x78,
+    0xcf, 0x6d, 0x37, 0x5c, 0x57, 0x19, 0xe7, 0x81, 0x2b, 0x24, 0xf9, 0xc7,
+    0x03, 0x49, 0x1a, 0xae, 0xda, 0xd4, 0xb7, 0xa3, 0xb5, 0xe9, 0x52, 0x54,
+    0xc1, 0xc3, 0xca, 0x8d, 0x1d, 0x6e, 0xa5, 0xb3, 0xed, 0x20, 0x52, 0x9e,
+    0x4f, 0x24, 0x35, 0x32, 0xe1, 0xa9, 0x24, 0xc7, 0x5e, 0xdb, 0x2e, 0xcd,
+    0xda, 0x42, 0xb1, 0x8c, 0x8c, 0x1c, 0x71, 0xa9, 0x9c, 0x99, 0xb2, 0xd3,
+    0x3a, 0x32, 0x02, 0x9a, 0xc1, 0x2e, 0xed, 0xb8, 0xb5, 0x75, 0x95, 0x6d,
+    0x10, 0x73, 0xee, 0xc6, 0x3e, 0x55, 0xa3, 0x40, 0xef, 0xb8, 0x6a, 0x83,
+    0xff, 0x00, 0x33, 0x70, 0x7d, 0xc6, 0x9b, 0x4a, 0x2a, 0x49, 0x7b, 0x7f,
+    0xd1, 0x26, 0xdb, 0x8b, 0x7e, 0xe3, 0xed, 0x47, 0xea, 0xf5, 0xd3, 0xe1,
+    0x5d, 0xfa, 0x0d, 0x14, 0x6a, 0x3f, 0x57, 0xae, 0x9f, 0x0a, 0xef, 0xd0,
+    0x68, 0xa8, 0x09, 0xc3, 0x4e, 0x7a, 0xbd, 0x6b, 0xf8, 0x56, 0xbe, 0x81,
+    0x4c, 0x6a, 0xbd, 0xa7, 0xaf, 0x76, 0xa4, 0xd8, 0x2d, 0x89, 0x55, 0xce,
+    0x08, 0x50, 0x8a, 0xd0, 0x20, 0xc8, 0x46, 0x41, 0xd8, 0x1e, 0xda, 0x61,
+    0xd3, 0x96, 0x9e, 0xf4, 0x81, 0xe2, 0x11, 0xe7, 0x40, 0x0c, 0x6b, 0x63,
+    0x4a, 0x03, 0x20, 0xf5, 0xd2, 0xae, 0x9c, 0xb4, 0xf7, 0xa4, 0x0f, 0x10,
+    0x8f, 0x3a, 0x3a, 0x72, 0xd3, 0xde, 0x90, 0x3c, 0x42, 0x3c, 0xea, 0xbe,
+    0xaf, 0x4d, 0x1d, 0x55, 0x4e, 0xa9, 0xf8, 0x64, 0x95, 0x58, 0xeb, 0x92,
+    0x92, 0x1c, 0x9a, 0xc4, 0xd2, 0x91, 0x7e, 0xb5, 0x0e, 0x17, 0x58, 0x3e,
+    0x21, 0x1e, 0x75, 0xef, 0x4f, 0xda, 0xbb, 0xd6, 0x07, 0x88, 0x47, 0x9d,
+    0x72, 0x96, 0x7a, 0x6f, 0x50, 0x9f, 0xe8, 0x92, 0x6b, 0xee, 0xbf, 0xa6,
+    0x69, 0x47, 0xa8, 0x43, 0xdd, 0x32, 0xd5, 0x1a, 0xee, 0x86, 0x6d, 0x6a,
+    0x8c, 0x59, 0x25, 0x7b, 0x25, 0x20, 0xf5, 0x1c, 0xe7, 0x8f, 0xdf, 0x49,
+    0x4d, 0x2e, 0xe9, 0xdb, 0x4f, 0x7a, 0x41, 0xf1, 0x08, 0xf3, 0xaf, 0x3a,
+    0x72, 0xd3, 0xde, 0x90, 0x3c, 0x42, 0x3c, 0xeb, 0x73, 0x45, 0xd3, 0xac,
+    0xaa, 0x51, 0xb2, 0xf9, 0xee, 0x71, 0x58, 0x58, 0x5c, 0x25, 0xfd, 0x94,
+    0xee, 0xd4, 0x46, 0x49, 0xc6, 0x0b, 0x09, 0xf2, 0xc6, 0x34, 0x52, 0xee,
+    0x9c, 0xb4, 0xf7, 0xa4, 0x0f, 0x10, 0x8f, 0x3a, 0x3a, 0x72, 0xd3, 0xde,
+    0x90, 0x3c, 0x42, 0x3c, 0xeb, 0x5c, 0xaa, 0x6a, 0xd5, 0xc7, 0x1a, 0x56,
+    0xf0, 0x7f, 0xe1, 0x1d, 0x1f, 0xc8, 0x6a, 0xb7, 0xa7, 0x2d, 0x57, 0xb7,
+    0xb4, 0xb5, 0xbd, 0x10, 0xef, 0x81, 0x88, 0xcf, 0x47, 0x49, 0xc2, 0xa3,
+    0x05, 0x2d, 0xa0, 0x47, 0x04, 0xa8, 0x11, 0xf2, 0xce, 0xf1, 0xdb, 0x56,
+    0x1b, 0x95, 0xc2, 0xcb, 0x70, 0xb7, 0xc8, 0x86, 0xfd, 0xd6, 0x18, 0x69,
+    0xf6, 0xcb, 0x6a, 0x29, 0x92, 0x80, 0x70, 0x46, 0x37, 0x6f, 0xaf, 0x2d,
+    0x77, 0x0b, 0x35, 0xba, 0xdb, 0x1a, 0x1b, 0x57, 0x68, 0x4a, 0x6d, 0x86,
+    0xd2, 0xda, 0x54, 0xa9, 0x08, 0xc9, 0x00, 0x63, 0x7e, 0xfa, 0x92, 0x33,
+    0xdb, 0x1c, 0x22, 0x37, 0x0c, 0xcb, 0x2c, 0x20, 0xe9, 0xab, 0x7c, 0x5d,
+    0x38, 0xab, 0x28, 0x6c, 0xb9, 0x11, 0x69, 0x21, 0xc2, 0xa3, 0xfa, 0x4b,
+    0x27, 0x8a, 0x89, 0xed, 0xcf, 0xdd, 0x81, 0x4b, 0xc6, 0x9c, 0xba, 0x1b,
+    0x77, 0x45, 0xae, 0xf8, 0x4d, 0xb7, 0x67, 0x9b, 0x38, 0x8e, 0x03, 0xc5,
+    0xbe, 0x1b, 0x1b, 0x79, 0xc7, 0x0d, 0xd9, 0xc5, 0x39, 0xe9, 0xcb, 0x4f,
+    0x7a, 0x40, 0xf1, 0x08, 0xf3, 0xa3, 0xa7, 0x2d, 0x3d, 0xe9, 0x03, 0xc4,
+    0x23, 0xce, 0x92, 0xb2, 0x43, 0xed, 0xc4, 0xde, 0xc5, 0xbe, 0x33, 0x16,
+    0xc4, 0xdb, 0xda, 0x68, 0x26, 0x22, 0x5b, 0xe6, 0x82, 0x3f, 0xdd, 0xc6,
+    0x29, 0x66, 0x8f, 0xd3, 0xcd, 0xe9, 0xbb, 0x5a, 0xa2, 0x21, 0xe2, 0xfa,
+    0xd6, 0xe1, 0x71, 0x6e, 0x14, 0xec, 0xe7, 0x70, 0x00, 0x63, 0xd8, 0x05,
+    0x4c, 0xe9, 0xcb, 0x4f, 0x7a, 0x40, 0xf1, 0x08, 0xf3, 0xa3, 0xa7, 0x2d,
+    0x3d, 0xe9, 0x03, 0xc4, 0x23, 0xce, 0x96, 0xe7, 0x86, 0xbe, 0x47, 0xb5,
+    0x65, 0x32, 0x06, 0x93, 0xd3, 0x2c, 0x69, 0xd5, 0x4f, 0x2c, 0x39, 0xce,
+    0x19, 0x4e, 0xed, 0x8f, 0xd1, 0xc6, 0xc2, 0x01, 0x3b, 0x29, 0xf6, 0xe3,
+    0x27, 0x7d, 0x6b, 0x93, 0xa7, 0x64, 0xb1, 0x78, 0x91, 0x71, 0xb1, 0x4f,
+    0x4c, 0x27, 0x24, 0xe3, 0xd2, 0x19, 0x71, 0x9e, 0x71, 0xb7, 0x08, 0xff,
+    0x00, 0x4b, 0x19, 0x18, 0x34, 0xcf, 0xa7, 0x2d, 0x3d, 0xe9, 0x03, 0xc4,
+    0x23, 0xce, 0x8e, 0x9c, 0xb4, 0xf7, 0xa4, 0x0f, 0x10, 0x8f, 0x3a, 0x7d,
+    0xc9, 0x67, 0x22, 0xed, 0xc7, 0x18, 0x34, 0xb3, 0x6c, 0x98, 0xab, 0x64,
+    0xd8, 0xd3, 0xee, 0x6b, 0x94, 0xf4, 0x96, 0xd4, 0x8e, 0x70, 0xb2, 0x94,
+    0x25, 0xbc, 0x82, 0x3f, 0x45, 0x23, 0xdf, 0xd6, 0x6b, 0x76, 0x9e, 0xb6,
+    0xf4, 0x3d, 0x96, 0x2c, 0x0e, 0x77, 0x9e, 0xe6, 0x13, 0xb3, 0xb7, 0xb3,
+    0xb3, 0xb5, 0xbc, 0x9e, 0x19, 0x3d, 0xb4, 0x74, 0xe5, 0xa7, 0xbd, 0x20,
+    0x78, 0x84, 0x79, 0xd1, 0xd3, 0x96, 0x9e, 0xf4, 0x81, 0xe2, 0x11, 0xe7,
+    0x49, 0xc9, 0xb5, 0x81, 0xa8, 0xa4, 0xf2, 0x2e, 0xb8, 0xe9, 0xe7, 0xfa,
+    0x65, 0x57, 0x5b, 0x2c, 0xe1, 0x06, 0x5b, 0xa8, 0x08, 0x7d, 0x2b, 0x6b,
+    0x9c, 0x6d, 0xe0, 0x38, 0x12, 0x32, 0x30, 0x7d, 0xb4, 0xc2, 0xd7, 0x06,
+    0x6b, 0x29, 0x78, 0xdd, 0x2e, 0x06, 0x72, 0x9d, 0x18, 0xd9, 0xe6, 0x52,
+    0xdb, 0x68, 0x1b, 0xf7, 0x00, 0x32, 0x7a, 0xfa, 0xc9, 0xaf, 0x7a, 0x72,
+    0xd3, 0xde, 0x90, 0x3c, 0x42, 0x3c, 0xe8, 0xe9, 0xcb, 0x4f, 0x7a, 0x40,
+    0xf1, 0x08, 0xf3, 0xa1, 0xcd, 0xb5, 0x86, 0x0a, 0x09, 0x3c, 0xa1, 0x45,
+    0xbb, 0x4e, 0x5c, 0x2d, 0x09, 0x76, 0x35, 0xa2, 0xee, 0x96, 0x6d, 0xeb,
+    0x51, 0x5a, 0x1a, 0x76, 0x3f, 0x3a, 0xa6, 0x73, 0xc4, 0x25, 0x5b, 0x43,
+    0x77, 0xbc, 0x1a, 0x6d, 0x62, 0xb3, 0xc7, 0xb3, 0xb2, 0xf2, 0x58, 0x53,
+    0x8e, 0x3a, 0xfb, 0x85, 0xe7, 0x9d, 0x70, 0xe5, 0x4e, 0x2c, 0xf1, 0x3b,
+    0xb7, 0x0f, 0x70, 0xaf, 0x7a, 0x72, 0xd3, 0xde, 0x90, 0x3c, 0x42, 0x3c,
+    0xe8, 0xe9, 0xcb, 0x4f, 0x7a, 0x40, 0xf1, 0x08, 0xf3, 0xa6, 0xe7, 0x29,
+    0x79, 0x05, 0x04, 0xbc, 0x06, 0xa3, 0xf5, 0x7a, 0xe9, 0xf0, 0xae, 0xfd,
+    0x06, 0x8a, 0x5f, 0xa8, 0x6f, 0x76, 0xa5, 0x58, 0x2e, 0x69, 0x4d, 0xce,
+    0x09, 0x51, 0x8a, 0xe8, 0x00, 0x48, 0x46, 0x49, 0xd8, 0x3e, 0xda, 0x2b,
+    0xc1, 0xe8, 0xff, 0xd9
+};
+
+unsigned int image_size = 4096;
+
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_background52.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+
+    worksheet_set_background_buffer(worksheet, image_buffer, image_size);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_area01.c

@@ -0,0 +1,48 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_area01.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_AREA);
+
+    /* For testing, copy the randomly generated axis ids in the target file. */
+    chart->axis_id_1 = 43407616;
+    chart->axis_id_2 = 43433984;
+
+    uint8_t data[5][3] = {
+        {1, 8,  3},
+        {2, 7,  6},
+        {3, 6,  9},
+        {4, 8,  12},
+        {5, 10, 15}
+    };
+
+    int row, col;
+    for (row = 0; row < 5; row++)
+        for (col = 0; col < 3; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col] , NULL);
+
+    chart_add_series(chart, 
+         "=Sheet1!$A$1:$A$5",
+         "=Sheet1!$B$1:$B$5"
+    );
+
+    chart_add_series(chart, 
+         "=Sheet1!$A$1:$A$5",
+         "=Sheet1!$C$1:$C$5"
+    );
+
+    worksheet_insert_chart(worksheet, CELL("E9"), chart);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_area02.c

@@ -0,0 +1,48 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_area02.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_AREA_STACKED);
+
+    /* For testing, copy the randomly generated axis ids in the target file. */
+    chart->axis_id_1 = 62813312;
+    chart->axis_id_2 = 62814848;
+
+    uint8_t data[5][3] = {
+        {1, 8,  3},
+        {2, 7,  6},
+        {3, 6,  9},
+        {4, 8,  12},
+        {5, 10, 15}
+    };
+
+    int row, col;
+    for (row = 0; row < 5; row++)
+        for (col = 0; col < 3; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col] , NULL);
+
+    chart_add_series(chart, 
+         "=Sheet1!$A$1:$A$5",
+         "=Sheet1!$B$1:$B$5"
+    );
+
+    chart_add_series(chart, 
+         "=Sheet1!$A$1:$A$5",
+         "=Sheet1!$C$1:$C$5"
+    );
+
+    worksheet_insert_chart(worksheet, CELL("E9"), chart);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_area03.c

@@ -0,0 +1,48 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_area03.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_AREA_STACKED_PERCENT);
+
+    /* For testing, copy the randomly generated axis ids in the target file. */
+    chart->axis_id_1 = 62813312;
+    chart->axis_id_2 = 62814848;
+
+    uint8_t data[5][3] = {
+        {1, 8,  3},
+        {2, 7,  6},
+        {3, 6,  9},
+        {4, 8,  12},
+        {5, 10, 15}
+    };
+
+    int row, col;
+    for (row = 0; row < 5; row++)
+        for (col = 0; col < 3; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col], NULL);
+
+    chart_add_series(chart, 
+         "=Sheet1!$A$1:$A$5",
+         "=Sheet1!$B$1:$B$5"
+    );
+
+    chart_add_series(chart, 
+         "=Sheet1!$A$1:$A$5",
+         "=Sheet1!$C$1:$C$5"
+    );
+
+    worksheet_insert_chart(worksheet, CELL("E9"), chart);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_area05.c

@@ -0,0 +1,49 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_area05.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_AREA);
+
+    /* For testing, copy the randomly generated axis ids in the target file. */
+    chart->axis_id_1 = 60957824;
+    chart->axis_id_2 = 60959360;
+
+    uint8_t data[5][3] = {
+        {1, 8,  3},
+        {2, 7,  6},
+        {3, 6,  9},
+        {4, 8,  12},
+        {5, 10, 15}
+    };
+
+    int row, col;
+    for (row = 0; row < 5; row++)
+        for (col = 0; col < 3; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col], NULL);
+
+    chart_add_series(chart,
+         "=Sheet1!$A$1:$A$5",
+         "=Sheet1!$B$1:$B$5"
+    );
+
+    chart_add_series(chart,
+         "=Sheet1!$A$1:$A$5",
+         "=Sheet1!$C$1:$C$5"
+    );
+
+    lxw_chart_options chart_options = {.description = "Some alternative text"};
+    worksheet_insert_chart_opt(worksheet, CELL("E9"), chart, &chart_options);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_area06.c

@@ -0,0 +1,49 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_area06.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_AREA);
+
+    /* For testing, copy the randomly generated axis ids in the target file. */
+    chart->axis_id_1 = 60957824;
+    chart->axis_id_2 = 60959360;
+
+    uint8_t data[5][3] = {
+        {1, 8,  3},
+        {2, 7,  6},
+        {3, 6,  9},
+        {4, 8,  12},
+        {5, 10, 15}
+    };
+
+    int row, col;
+    for (row = 0; row < 5; row++)
+        for (col = 0; col < 3; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col], NULL);
+
+    chart_add_series(chart,
+         "=Sheet1!$A$1:$A$5",
+         "=Sheet1!$B$1:$B$5"
+    );
+
+    chart_add_series(chart,
+         "=Sheet1!$A$1:$A$5",
+         "=Sheet1!$C$1:$C$5"
+    );
+
+    lxw_chart_options chart_options = {.description = "Some alternative text", .decorative = LXW_TRUE};
+    worksheet_insert_chart_opt(worksheet, CELL("E9"), chart, &chart_options);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_axis01.c

@@ -0,0 +1,45 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_axis01.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_BAR);
+
+    /* For testing, copy the randomly generated axis ids in the target file. */
+    chart->axis_id_1 = 58955648;
+    chart->axis_id_2 = 68446848;
+
+    uint8_t data[5][3] = {
+        {1, 2,  3},
+        {2, 4,  6},
+        {3, 6,  9},
+        {4, 8,  12},
+        {5, 10, 15}
+    };
+
+    int row, col;
+    for (row = 0; row < 5; row++)
+        for (col = 0; col < 3; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col], NULL);
+
+    chart_add_series(chart, NULL, "=Sheet1!$A$1:$A$5");
+    chart_add_series(chart, NULL, "=Sheet1!$B$1:$B$5");
+    chart_add_series(chart, NULL, "=Sheet1!$C$1:$C$5");
+
+    chart_axis_set_name(chart->x_axis, "XXX");
+    chart_axis_set_name(chart->y_axis, "YYY");
+
+    worksheet_insert_chart(worksheet, CELL("E9"), chart);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_axis02.c

@@ -0,0 +1,45 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_axis02.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_COLUMN);
+
+    /* For testing, copy the randomly generated axis ids in the target file. */
+    chart->axis_id_1 = 43704320;
+    chart->axis_id_2 = 43706624;
+
+    uint8_t data[5][3] = {
+        {1, 2,  3},
+        {2, 4,  6},
+        {3, 6,  9},
+        {4, 8,  12},
+        {5, 10, 15}
+    };
+
+    int row, col;
+    for (row = 0; row < 5; row++)
+        for (col = 0; col < 3; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col], NULL);
+
+    chart_add_series(chart, NULL, "=Sheet1!$A$1:$A$5");
+    chart_add_series(chart, NULL, "=Sheet1!$B$1:$B$5");
+    chart_add_series(chart, NULL, "=Sheet1!$C$1:$C$5");
+
+    chart_axis_set_name(chart->x_axis, "XXX");
+    chart_axis_set_name(chart->y_axis, "YYY");
+
+    worksheet_insert_chart(worksheet, CELL("E9"), chart);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_axis04.c

@@ -0,0 +1,51 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_axis04.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_SCATTER);
+
+    /* For testing, copy the randomly generated axis ids in the target file. */
+    chart->axis_id_1 = 46891776;
+    chart->axis_id_2 = 46893312;
+
+    uint8_t data[5][3] = {
+        {1, 2,  3},
+        {2, 4,  6},
+        {3, 6,  9},
+        {4, 8,  12},
+        {5, 10, 15}
+    };
+
+    int row, col;
+    for (row = 0; row < 5; row++)
+        for (col = 0; col < 3; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col], NULL);
+
+    chart_add_series(chart, 
+         "=Sheet1!$A$1:$A$5",
+         "=Sheet1!$B$1:$B$5"
+    );
+
+    chart_add_series(chart, 
+         "=Sheet1!$A$1:$A$5",
+         "=Sheet1!$C$1:$C$5"
+    );
+
+    chart_axis_set_name(chart->x_axis, "XXX");
+    chart_axis_set_name(chart->y_axis, "YYY");
+
+    worksheet_insert_chart(worksheet, CELL("E9"), chart);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_axis05.c

@@ -0,0 +1,45 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_axis05.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_LINE);
+
+    /* For testing, copy the randomly generated axis ids in the target file. */
+    chart->axis_id_1 = 47076480;
+    chart->axis_id_2 = 47078016;
+
+    uint8_t data[5][3] = {
+        {1, 2,  3},
+        {2, 4,  6},
+        {3, 6,  9},
+        {4, 8,  12},
+        {5, 10, 15}
+    };
+
+    int row, col;
+    for (row = 0; row < 5; row++)
+        for (col = 0; col < 3; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col], NULL);
+
+    chart_add_series(chart, NULL, "=Sheet1!$A$1:$A$5");
+    chart_add_series(chart, NULL, "=Sheet1!$B$1:$B$5");
+    chart_add_series(chart, NULL, "=Sheet1!$C$1:$C$5");
+
+    chart_axis_set_name(chart->x_axis, "XXX");
+    chart_axis_set_name(chart->y_axis, "YYY");
+
+    worksheet_insert_chart(worksheet, CELL("E9"), chart);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_axis06.c

@@ -0,0 +1,43 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_axis06.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_PIE);
+
+    uint8_t data[3][2] = {
+        {2,  60},
+        {4,  30},
+        {6,  10},
+    };
+
+    int row, col;
+    for (row = 0; row < 3; row++)
+        for (col = 0; col < 2; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col], NULL);
+
+    chart_add_series(chart, 
+         "=Sheet1!$A$1:$A$3",
+         "=Sheet1!$B$1:$B$3"
+    );
+
+    chart_title_set_name(chart, "Title");
+
+    /* Axis formatting should be igmored. */
+    chart_axis_set_name(chart->x_axis, "XXX");
+    chart_axis_set_name(chart->y_axis, "YYY");
+
+    worksheet_insert_chart(worksheet, CELL("E9"), chart);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_axis07.c

@@ -0,0 +1,51 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_axis07.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_AREA);
+
+    /* For testing, copy the randomly generated axis ids in the target file. */
+    chart->axis_id_1 = 43321216;
+    chart->axis_id_2 = 47077248;
+
+    uint8_t data[5][3] = {
+        {1, 8,  3},
+        {2, 7,  6},
+        {3, 6,  9},
+        {4, 8,  12},
+        {5, 10, 15}
+    };
+
+    int row, col;
+    for (row = 0; row < 5; row++)
+        for (col = 0; col < 3; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col], NULL);
+
+    chart_add_series(chart,
+         "=Sheet1!$A$1:$A$5",
+         "=Sheet1!$B$1:$B$5"
+    );
+
+    chart_add_series(chart,
+         "=Sheet1!$A$1:$A$5",
+         "=Sheet1!$C$1:$C$5"
+    );
+
+    chart_axis_set_name(chart->x_axis, "XXX");
+    chart_axis_set_name(chart->y_axis, "YYY");
+
+    worksheet_insert_chart(worksheet, CELL("E9"), chart);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_axis08.c

@@ -0,0 +1,50 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_axis08.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_BAR);
+
+    /* For testing, copy the randomly generated axis ids in the target file. */
+    chart->axis_id_1 = 49042560;
+    chart->axis_id_2 = 61199872;
+
+    uint8_t data[5][3] = {
+        {1, 2,  3},
+        {2, 4,  6},
+        {3, 6,  9},
+        {4, 8,  12},
+        {5, 10, 15}
+    };
+
+    int row, col;
+    for (row = 0; row < 5; row++)
+        for (col = 0; col < 3; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col], NULL);
+
+    chart_add_series(chart,
+         "=Sheet1!$A$1:$A$5",
+         "=Sheet1!$B$1:$B$5"
+    );
+
+    chart_add_series(chart,
+         "=Sheet1!$A$1:$A$5",
+         "=Sheet1!$C$1:$C$5"
+    );
+
+    chart_axis_set_reverse(chart->y_axis);
+
+    worksheet_insert_chart(worksheet, CELL("E9"), chart);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_axis09.c

@@ -0,0 +1,44 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_axis09.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_COLUMN);
+
+    /* For testing, copy the randomly generated axis ids in the target file. */
+    chart->axis_id_1 = 49043712;
+    chart->axis_id_2 = 60236160;
+
+    uint8_t data[5][3] = {
+        {1, 2,  3},
+        {2, 4,  6},
+        {3, 6,  9},
+        {4, 8,  12},
+        {5, 10, 15}
+    };
+
+    int row, col;
+    for (row = 0; row < 5; row++)
+        for (col = 0; col < 3; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col], NULL);
+
+    chart_add_series(chart, NULL, "=Sheet1!$A$1:$A$5");
+    chart_add_series(chart, NULL, "=Sheet1!$B$1:$B$5");
+    chart_add_series(chart, NULL, "=Sheet1!$C$1:$C$5");
+
+    chart_axis_set_reverse(chart->x_axis);
+
+    worksheet_insert_chart(worksheet, CELL("E9"), chart);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_axis10.c

@@ -0,0 +1,51 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_axis10.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_BAR);
+
+    /* For testing, copy the randomly generated axis ids in the target file. */
+    chart->axis_id_1 = 41012608;
+    chart->axis_id_2 = 55821440;
+
+    uint8_t data[5][3] = {
+        {1, 2,  3},
+        {2, 4,  6},
+        {3, 6,  9},
+        {4, 8,  12},
+        {5, 10, 15}
+    };
+
+    int row, col;
+    for (row = 0; row < 5; row++)
+        for (col = 0; col < 3; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col], NULL);
+
+    chart_add_series(chart,
+         "=Sheet1!$A$1:$A$5",
+         "=Sheet1!$B$1:$B$5"
+    );
+
+    chart_add_series(chart,
+         "=Sheet1!$A$1:$A$5",
+         "=Sheet1!$C$1:$C$5"
+    );
+
+    chart_axis_set_reverse(chart->x_axis);
+    chart_axis_set_reverse(chart->y_axis);
+
+    worksheet_insert_chart(worksheet, CELL("E9"), chart);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_axis11.c

@@ -0,0 +1,45 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_axis11.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_BAR);
+
+    /* For testing, copy the randomly generated axis ids in the target file. */
+    chart->axis_id_1 = 45705472;
+    chart->axis_id_2 = 54518528;
+
+    uint8_t data[5][3] = {
+        {1, 2,  3},
+        {2, 4,  6},
+        {3, 6,  9},
+        {4, 8,  12},
+        {5, 10, 15}
+    };
+
+    int row, col;
+    for (row = 0; row < 5; row++)
+        for (col = 0; col < 3; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col], NULL);
+
+    chart_add_series(chart, NULL, "=Sheet1!$A$1:$A$5");
+    chart_add_series(chart, NULL, "=Sheet1!$B$1:$B$5");
+    chart_add_series(chart, NULL, "=Sheet1!$C$1:$C$5");
+
+    chart_axis_set_min(chart->x_axis, 0);
+    chart_axis_set_max(chart->x_axis, 20);
+
+    worksheet_insert_chart(worksheet, CELL("E9"), chart);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_axis12.c

@@ -0,0 +1,45 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_axis12.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_COLUMN);
+
+    /* For testing, copy the randomly generated axis ids in the target file. */
+    chart->axis_id_1 = 45705088;
+    chart->axis_id_2 = 54517760;
+
+    uint8_t data[5][3] = {
+        {1, 2,  3},
+        {2, 4,  6},
+        {3, 6,  9},
+        {4, 8,  12},
+        {5, 10, 15}
+    };
+
+    int row, col;
+    for (row = 0; row < 5; row++)
+        for (col = 0; col < 3; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col], NULL);
+
+    chart_add_series(chart, NULL, "=Sheet1!$A$1:$A$5");
+    chart_add_series(chart, NULL, "=Sheet1!$B$1:$B$5");
+    chart_add_series(chart, NULL, "=Sheet1!$C$1:$C$5");
+
+    chart_axis_set_min(chart->y_axis, 0);
+    chart_axis_set_max(chart->y_axis, 16);
+
+    worksheet_insert_chart(worksheet, CELL("E9"), chart);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_axis13.c

@@ -0,0 +1,53 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_axis13.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_SCATTER);
+
+    /* For testing, copy the randomly generated axis ids in the target file. */
+    chart->axis_id_1 = 54045312;
+    chart->axis_id_2 = 54043776;
+
+    uint8_t data[5][3] = {
+        {1, 2,  3},
+        {2, 4,  6},
+        {3, 6,  9},
+        {4, 8,  12},
+        {5, 10, 15}
+    };
+
+    int row, col;
+    for (row = 0; row < 5; row++)
+        for (col = 0; col < 3; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col], NULL);
+
+    chart_add_series(chart,
+         "=Sheet1!$A$1:$A$5",
+         "=Sheet1!$B$1:$B$5"
+    );
+
+    chart_add_series(chart,
+         "=Sheet1!$A$1:$A$5",
+         "=Sheet1!$C$1:$C$5"
+    );
+
+    chart_axis_set_min(chart->x_axis, 0);
+    chart_axis_set_max(chart->x_axis, 6);
+    chart_axis_set_min(chart->y_axis, 0);
+    chart_axis_set_max(chart->y_axis, 16);
+
+    worksheet_insert_chart(worksheet, CELL("E9"), chart);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_axis15.c

@@ -0,0 +1,45 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_axis15.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_COLUMN);
+
+    /* For testing, copy the randomly generated axis ids in the target file. */
+    chart->axis_id_1 = 45705856;
+    chart->axis_id_2 = 54518528;
+
+    uint8_t data[5][3] = {
+        {1, 2,  3},
+        {2, 4,  6},
+        {3, 6,  9},
+        {4, 8,  12},
+        {5, 10, 15}
+    };
+
+    int row, col;
+    for (row = 0; row < 5; row++)
+        for (col = 0; col < 3; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col], NULL);
+
+    chart_add_series(chart, NULL, "=Sheet1!$A$1:$A$5");
+    chart_add_series(chart, NULL, "=Sheet1!$B$1:$B$5");
+    chart_add_series(chart, NULL, "=Sheet1!$C$1:$C$5");
+
+    chart_axis_set_major_unit(chart->y_axis, 2);
+    chart_axis_set_minor_unit(chart->y_axis, 0.4);
+
+    worksheet_insert_chart(worksheet, CELL("E9"), chart);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_axis17.c

@@ -0,0 +1,44 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_axis17.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_COLUMN);
+
+    /* For testing, copy the randomly generated axis ids in the target file. */
+    chart->axis_id_1 = 43812736;
+    chart->axis_id_2 = 45705088;
+
+    uint8_t data[5][3] = {
+        {1, 2,  3},
+        {2, 4,  6},
+        {3, 6,  9},
+        {4, 8,  12},
+        {5, 10, 15}
+    };
+
+    int row, col;
+    for (row = 0; row < 5; row++)
+        for (col = 0; col < 3; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col], NULL);
+
+    chart_add_series(chart, NULL, "=Sheet1!$A$1:$A$5");
+    chart_add_series(chart, NULL, "=Sheet1!$B$1:$B$5");
+    chart_add_series(chart, NULL, "=Sheet1!$C$1:$C$5");
+
+    chart_axis_set_log_base(chart->y_axis, 10);
+
+    worksheet_insert_chart(worksheet, CELL("E9"), chart);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_axis18.c

@@ -0,0 +1,44 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_axis18.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_COLUMN);
+
+    /* For testing, copy the randomly generated axis ids in the target file. */
+    chart->axis_id_1 = 43813504;
+    chart->axis_id_2 = 45705472;
+
+    uint8_t data[5][3] = {
+        {1, 2,  3},
+        {2, 4,  6},
+        {3, 6,  9},
+        {4, 8,  12},
+        {5, 10, 15}
+    };
+
+    int row, col;
+    for (row = 0; row < 5; row++)
+        for (col = 0; col < 3; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col], NULL);
+
+    lxw_chart_series *series  = chart_add_series(chart, NULL, "=Sheet1!$A$1:$A$5");
+    chart_add_series(chart, NULL, "=Sheet1!$B$1:$B$5");
+    chart_add_series(chart, NULL, "=Sheet1!$C$1:$C$5");
+
+    chart_series_set_invert_if_negative(series);
+
+    worksheet_insert_chart(worksheet, CELL("E9"), chart);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_axis19.c

@@ -0,0 +1,45 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_axis19.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_COLUMN);
+
+    /* For testing, copy the randomly generated axis ids in the target file. */
+    chart->axis_id_1 = 43813504;
+    chart->axis_id_2 = 45705472;
+
+    uint8_t data[5][3] = {
+        {1, 2,  3},
+        {2, 4,  6},
+        {3, 6,  9},
+        {4, 8,  12},
+        {5, 10, 15}
+    };
+
+    int row, col;
+    for (row = 0; row < 5; row++)
+        for (col = 0; col < 3; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col], NULL);
+
+    chart_add_series(chart, NULL, "=Sheet1!$A$1:$A$5");
+    chart_add_series(chart, NULL, "=Sheet1!$B$1:$B$5");
+    chart_add_series(chart, NULL, "=Sheet1!$C$1:$C$5");
+
+    chart_axis_set_label_position(chart->x_axis, LXW_CHART_AXIS_LABEL_POSITION_HIGH);
+    chart_axis_set_label_position(chart->y_axis, LXW_CHART_AXIS_LABEL_POSITION_LOW);
+
+    worksheet_insert_chart(worksheet, CELL("E9"), chart);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_axis20.c

@@ -0,0 +1,45 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_axis20.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_COLUMN);
+
+    /* For testing, copy the randomly generated axis ids in the target file. */
+    chart->axis_id_1 = 43572224;
+    chart->axis_id_2 = 43812352;
+
+    uint8_t data[5][3] = {
+        {1, 2,  3},
+        {2, 4,  6},
+        {3, 6,  9},
+        {4, 8,  12},
+        {5, 10, 15}
+    };
+
+    int row, col;
+    for (row = 0; row < 5; row++)
+        for (col = 0; col < 3; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col], NULL);
+
+    chart_add_series(chart, NULL, "=Sheet1!$A$1:$A$5");
+    chart_add_series(chart, NULL, "=Sheet1!$B$1:$B$5");
+    chart_add_series(chart, NULL, "=Sheet1!$C$1:$C$5");
+
+    chart_axis_set_label_position(chart->x_axis, LXW_CHART_AXIS_LABEL_POSITION_NEXT_TO);
+    chart_axis_set_label_position(chart->y_axis, LXW_CHART_AXIS_LABEL_POSITION_NONE);
+
+    worksheet_insert_chart(worksheet, CELL("E9"), chart);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_axis21.c

@@ -0,0 +1,50 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_axis21.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_SCATTER);
+
+    /* For testing, copy the randomly generated axis ids in the target file. */
+    chart->axis_id_1 = 58921344;
+    chart->axis_id_2 = 54519680;
+
+    uint8_t data[5][3] = {
+        {1, 2,  3},
+        {2, 4,  6},
+        {3, 6,  9},
+        {4, 8,  12},
+        {5, 10, 15}
+    };
+
+    int row, col;
+    for (row = 0; row < 5; row++)
+        for (col = 0; col < 3; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col], NULL);
+
+    chart_add_series(chart, 
+         "=Sheet1!$A$1:$A$5",
+         "=Sheet1!$B$1:$B$5"
+    );
+
+    chart_add_series(chart, 
+         "=Sheet1!$A$1:$A$5",
+         "=Sheet1!$C$1:$C$5"
+    );
+
+    chart_axis_set_reverse(chart->x_axis);
+
+    worksheet_insert_chart(worksheet, CELL("E9"), chart);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_axis22.c

@@ -0,0 +1,44 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_axis22.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_COLUMN);
+
+    /* For testing, copy the randomly generated axis ids in the target file. */
+    chart->axis_id_1 = 86799104;
+    chart->axis_id_2 = 86801792;
+
+    uint8_t data[5][3] = {
+        {1, 2,  3},
+        {2, 4,  6},
+        {3, 6,  9},
+        {4, 8,  12},
+        {5, 10, 15}
+    };
+
+    int row, col;
+    for (row = 0; row < 5; row++)
+        for (col = 0; col < 3; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col], NULL);
+
+    chart_add_series(chart, NULL, "=Sheet1!$A$1:$A$5");
+    chart_add_series(chart, NULL, "=Sheet1!$B$1:$B$5");
+    chart_add_series(chart, NULL, "=Sheet1!$C$1:$C$5");
+
+    chart_axis_set_num_format(chart->x_axis, "#,##0.00");
+
+    worksheet_insert_chart(worksheet, CELL("E9"), chart);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_axis23.c

@@ -0,0 +1,45 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_axis23.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_COLUMN);
+
+    /* For testing, copy the randomly generated axis ids in the target file. */
+    chart->axis_id_1 = 46332160;
+    chart->axis_id_2 = 47470848;
+
+    uint8_t data[5][3] = {
+        {1, 2,  3},
+        {2, 4,  6},
+        {3, 6,  9},
+        {4, 8,  12},
+        {5, 10, 15}
+    };
+
+    int row, col;
+    for (row = 0; row < 5; row++)
+        for (col = 0; col < 3; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col], NULL);
+
+    chart_add_series(chart, NULL, "=Sheet1!$A$1:$A$5");
+    chart_add_series(chart, NULL, "=Sheet1!$B$1:$B$5");
+    chart_add_series(chart, NULL, "=Sheet1!$C$1:$C$5");
+
+    chart_axis_set_num_format(chart->x_axis, "dd/mm/yyyy");
+    chart_axis_set_num_format(chart->y_axis, "0.00%");
+
+    worksheet_insert_chart(worksheet, CELL("E9"), chart);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_axis24.c

@@ -0,0 +1,47 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_axis24.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_COLUMN);
+
+    /* For testing, copy the randomly generated axis ids in the target file. */
+    chart->axis_id_1 = 47471232;
+    chart->axis_id_2 = 48509696;
+
+    uint8_t data[5][3] = {
+        {1, 2,  3},
+        {2, 4,  6},
+        {3, 6,  9},
+        {4, 8,  12},
+        {5, 10, 15}
+    };
+
+    int row, col;
+    for (row = 0; row < 5; row++)
+        for (col = 0; col < 3; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col], NULL);
+
+    chart_add_series(chart, NULL, "=Sheet1!$A$1:$A$5");
+    chart_add_series(chart, NULL, "=Sheet1!$B$1:$B$5");
+    chart_add_series(chart, NULL, "=Sheet1!$C$1:$C$5");
+
+    chart_axis_set_num_format(chart->x_axis, "dd/mm/yyyy");
+    chart_axis_set_num_format(chart->y_axis, "0.00%");
+
+    chart->x_axis->source_linked = 1;
+
+    worksheet_insert_chart(worksheet, CELL("E9"), chart);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_axis25.c

@@ -0,0 +1,45 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_axis25.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_COLUMN);
+
+    /* For testing, copy the randomly generated axis ids in the target file. */
+    chart->axis_id_1 = 47471232;
+    chart->axis_id_2 = 48509696;
+
+    uint8_t data[5][3] = {
+        {1, 2,  3},
+        {2, 4,  6},
+        {3, 6,  9},
+        {4, 8,  12},
+        {5, 10, 15}
+    };
+
+    int row, col;
+    for (row = 0; row < 5; row++)
+        for (col = 0; col < 3; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col], NULL);
+
+    chart_add_series(chart, NULL, "=Sheet1!$A$1:$A$5");
+    chart_add_series(chart, NULL, "=Sheet1!$B$1:$B$5");
+    chart_add_series(chart, NULL, "=Sheet1!$C$1:$C$5");
+
+    chart_axis_set_num_format(chart->x_axis, "[$¥-411]#,##0.00");
+    chart_axis_set_num_format(chart->y_axis, "0.00%");
+
+    worksheet_insert_chart(worksheet, CELL("E9"), chart);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_axis26.c

@@ -0,0 +1,45 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_axis26.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_LINE);
+
+    /* For testing, copy the randomly generated axis ids in the target file. */
+    chart->axis_id_1 = 108315392;
+    chart->axis_id_2 = 108329216;
+
+    uint8_t data[5][3] = {
+        {1, 2,  3},
+        {2, 4,  6},
+        {3, 6,  9},
+        {4, 8,  12},
+        {5, 10, 15}
+    };
+
+    int row, col;
+    for (row = 0; row < 5; row++)
+        for (col = 0; col < 3; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col], NULL);
+
+    chart_add_series(chart, NULL, "=Sheet1!$A$1:$A$5");
+    chart_add_series(chart, NULL, "=Sheet1!$B$1:$B$5");
+    chart_add_series(chart, NULL, "=Sheet1!$C$1:$C$5");
+
+    lxw_chart_font font1 = {.rotation = 45, .baseline = -1};
+    chart_axis_set_num_font(chart->x_axis, &font1);
+
+    worksheet_insert_chart(worksheet, CELL("E9"), chart);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_axis27.c

@@ -0,0 +1,45 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_axis27.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_LINE);
+
+    /* For testing, copy the randomly generated axis ids in the target file. */
+    chart->axis_id_1 = 108315392;
+    chart->axis_id_2 = 108329216;
+
+    uint8_t data[5][3] = {
+        {1, 2,  3},
+        {2, 4,  6},
+        {3, 6,  9},
+        {4, 8,  12},
+        {5, 10, 15}
+    };
+
+    int row, col;
+    for (row = 0; row < 5; row++)
+        for (col = 0; col < 3; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col], NULL);
+
+    chart_add_series(chart, NULL, "=Sheet1!$A$1:$A$5");
+    chart_add_series(chart, NULL, "=Sheet1!$B$1:$B$5");
+    chart_add_series(chart, NULL, "=Sheet1!$C$1:$C$5");
+
+    lxw_chart_font font1 = {.rotation = -35, .baseline = -1};
+    chart_axis_set_num_font(chart->x_axis, &font1);
+
+    worksheet_insert_chart(worksheet, CELL("E9"), chart);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_axis28.c

@@ -0,0 +1,45 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_axis28.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_LINE);
+
+    /* For testing, copy the randomly generated axis ids in the target file. */
+    chart->axis_id_1 = 115375104;
+    chart->axis_id_2 = 115390720;
+
+    uint8_t data[5][3] = {
+        {1, 2,  3},
+        {2, 4,  6},
+        {3, 6,  9},
+        {4, 8,  12},
+        {5, 10, 15}
+    };
+
+    int row, col;
+    for (row = 0; row < 5; row++)
+        for (col = 0; col < 3; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col], NULL);
+
+    chart_add_series(chart, NULL, "=Sheet1!$A$1:$A$5");
+    chart_add_series(chart, NULL, "=Sheet1!$B$1:$B$5");
+    chart_add_series(chart, NULL, "=Sheet1!$C$1:$C$5");
+
+    lxw_chart_font font1 = {.rotation = 90, .baseline = -1};
+    chart_axis_set_num_font(chart->x_axis, &font1);
+
+    worksheet_insert_chart(worksheet, CELL("E9"), chart);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_axis29.c

@@ -0,0 +1,45 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_axis29.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_LINE);
+
+    /* For testing, copy the randomly generated axis ids in the target file. */
+    chart->axis_id_1 = 145169024;
+    chart->axis_id_2 = 145176448;
+
+    uint8_t data[5][3] = {
+        {1, 2,  3},
+        {2, 4,  6},
+        {3, 6,  9},
+        {4, 8,  12},
+        {5, 10, 15}
+    };
+
+    int row, col;
+    for (row = 0; row < 5; row++)
+        for (col = 0; col < 3; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col], NULL);
+
+    chart_add_series(chart, NULL, "=Sheet1!$A$1:$A$5");
+    chart_add_series(chart, NULL, "=Sheet1!$B$1:$B$5");
+    chart_add_series(chart, NULL, "=Sheet1!$C$1:$C$5");
+
+    lxw_chart_font font1 = {.rotation = -90, .baseline = -1};
+    chart_axis_set_num_font(chart->x_axis, &font1);
+
+    worksheet_insert_chart(worksheet, CELL("E9"), chart);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_axis30.c

@@ -0,0 +1,44 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_axis30.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_LINE);
+
+    /* For testing, copy the randomly generated axis ids in the target file. */
+    chart->axis_id_1 = 69200896;
+    chart->axis_id_2 = 69215360;
+
+    uint8_t data[5][3] = {
+        {1, 2,  3},
+        {2, 4,  6},
+        {3, 6,  9},
+        {4, 8,  12},
+        {5, 10, 15}
+    };
+
+    int row, col;
+    for (row = 0; row < 5; row++)
+        for (col = 0; col < 3; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col], NULL);
+
+    chart_axis_set_position(chart->x_axis, LXW_CHART_AXIS_POSITION_ON_TICK);
+
+    chart_add_series(chart, NULL, "=Sheet1!$A$1:$A$5");
+    chart_add_series(chart, NULL, "=Sheet1!$B$1:$B$5");
+    chart_add_series(chart, NULL, "=Sheet1!$C$1:$C$5");
+
+    worksheet_insert_chart(worksheet, CELL("E9"), chart);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_axis31.c

@@ -0,0 +1,44 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_axis31.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_BAR);
+
+    /* For testing, copy the randomly generated axis ids in the target file. */
+    chart->axis_id_1 = 90616960;
+    chart->axis_id_2 = 90618496;
+
+    uint8_t data[5][3] = {
+        {1, 2,  3},
+        {2, 4,  6},
+        {3, 6,  9},
+        {4, 8,  12},
+        {5, 10, 15}
+    };
+
+    int row, col;
+    for (row = 0; row < 5; row++)
+        for (col = 0; col < 3; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col], NULL);
+
+    chart_axis_set_position(chart->y_axis, LXW_CHART_AXIS_POSITION_ON_TICK);
+
+    chart_add_series(chart, NULL, "=Sheet1!$A$1:$A$5");
+    chart_add_series(chart, NULL, "=Sheet1!$B$1:$B$5");
+    chart_add_series(chart, NULL, "=Sheet1!$C$1:$C$5");
+
+    worksheet_insert_chart(worksheet, CELL("E9"), chart);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_axis32.c

@@ -0,0 +1,44 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_axis32.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_AREA);
+
+    /* For testing, copy the randomly generated axis ids in the target file. */
+    chart->axis_id_1 = 96171520;
+    chart->axis_id_2 = 96173056;
+
+    uint8_t data[5][3] = {
+        {1, 2,  3},
+        {2, 4,  6},
+        {3, 6,  9},
+        {4, 8,  12},
+        {5, 10, 15}
+    };
+
+    int row, col;
+    for (row = 0; row < 5; row++)
+        for (col = 0; col < 3; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col], NULL);
+
+    chart_axis_set_position(chart->x_axis, LXW_CHART_AXIS_POSITION_BETWEEN);
+
+    chart_add_series(chart, NULL, "=Sheet1!$A$1:$A$5");
+    chart_add_series(chart, NULL, "=Sheet1!$B$1:$B$5");
+    chart_add_series(chart, NULL, "=Sheet1!$C$1:$C$5");
+
+    worksheet_insert_chart(worksheet, CELL("E9"), chart);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_axis33.c

@@ -0,0 +1,50 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_axis33.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_LINE);
+
+    /* For testing, copy the randomly generated axis ids in the target file. */
+    chart->axis_id_1 = 143682944;
+    chart->axis_id_2 = 143946496;
+
+    uint8_t data[5][3] = {
+        {1, 2,  3},
+        {2, 4,  6},
+        {3, 6,  9},
+        {4, 8,  12},
+        {5, 10, 15}
+    };
+
+    int row, col;
+    for (row = 0; row < 5; row++)
+        for (col = 0; col < 3; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col], NULL);
+
+    chart_add_series(chart, NULL, "=Sheet1!$A$1:$A$5");
+    chart_add_series(chart, NULL, "=Sheet1!$B$1:$B$5");
+    chart_add_series(chart, NULL, "=Sheet1!$C$1:$C$5");
+
+    lxw_chart_font font1 = {.rotation = -45, .baseline = -1};
+
+    chart_axis_set_name(chart->x_axis, "XXX");
+    chart_axis_set_name_font(chart->x_axis, &font1);
+
+    chart_axis_set_name(chart->y_axis, "YYY");
+    chart_axis_set_name_font(chart->y_axis, &font1);
+
+    worksheet_insert_chart(worksheet, CELL("E9"), chart);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_axis34.c

@@ -0,0 +1,44 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_axis34.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_LINE);
+
+    /* For testing, copy the randomly generated axis ids in the target file. */
+    chart->axis_id_1 = 54712192;
+    chart->axis_id_2 = 54713728;
+
+    uint8_t data[5][3] = {
+        {1, 2,  3},
+        {2, 4,  6},
+        {3, 6,  9},
+        {4, 8,  12},
+        {5, 10, 15}
+    };
+
+    int row, col;
+    for (row = 0; row < 5; row++)
+        for (col = 0; col < 3; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col], NULL);
+
+    chart_add_series(chart, NULL, "=Sheet1!$A$1:$A$5");
+    chart_add_series(chart, NULL, "=Sheet1!$B$1:$B$5");
+    chart_add_series(chart, NULL, "=Sheet1!$C$1:$C$5");
+
+    chart_axis_set_interval_unit(chart->x_axis, 2);
+
+    worksheet_insert_chart(worksheet, CELL("E9"), chart);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_axis35.c

@@ -0,0 +1,46 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_axis35.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_COLUMN);
+
+    /* For testing, copy the randomly generated axis ids in the target file. */
+    chart->axis_id_1 = 63008128;
+    chart->axis_id_2 = 62522496;
+
+    uint8_t data[5][3] = {
+        {1, 2,  3},
+        {2, 4,  6},
+        {3, 6,  9},
+        {4, 8,  12},
+        {5, 10, 15}
+    };
+
+    int row, col;
+    for (row = 0; row < 5; row++)
+        for (col = 0; col < 3; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col], NULL);
+
+    chart_add_series(chart, NULL, "=Sheet1!$A$1:$A$5");
+    chart_add_series(chart, NULL, "=Sheet1!$B$1:$B$5");
+    chart_add_series(chart, NULL, "=Sheet1!$C$1:$C$5");
+
+    lxw_chart_line line = {.none = LXW_TRUE};
+
+    chart_axis_set_line(chart->y_axis, &line);
+
+    worksheet_insert_chart(worksheet, CELL("E9"), chart);
+
+    return workbook_close(workbook);
+}

library/libxlsxwriter/test/functional/src/test_chart_axis36.c

@@ -0,0 +1,46 @@
+/*****************************************************************************
+ * Test cases for libxlsxwriter.
+ *
+ * Test to compare output against Excel files.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+int main() {
+
+    lxw_workbook  *workbook  = workbook_new("test_chart_axis36.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_COLUMN);
+
+    /* For testing, copy the randomly generated axis ids in the target file. */
+    chart->axis_id_1 = 45501056;
+    chart->axis_id_2 = 47505792;
+
+    uint8_t data[5][3] = {
+        {1, 2,  3},
+        {2, 4,  6},
+        {3, 6,  9},
+        {4, 8,  12},
+        {5, 10, 15}
+    };
+
+    int row, col;
+    for (row = 0; row < 5; row++)
+        for (col = 0; col < 3; col++)
+            worksheet_write_number(worksheet, row, col, data[row][col], NULL);
+
+    chart_add_series(chart, NULL, "=Sheet1!$A$1:$A$5");
+    chart_add_series(chart, NULL, "=Sheet1!$B$1:$B$5");
+    chart_add_series(chart, NULL, "=Sheet1!$C$1:$C$5");
+
+    lxw_chart_line line = {.none = LXW_TRUE};
+
+    chart_axis_set_line(chart->x_axis, &line);
+
+    worksheet_insert_chart(worksheet, CELL("E9"), chart);
+
+    return workbook_close(workbook);
+}