def METHOD_NAME(self):
    """Test for border colour styles."""
    self.maxDiff = None
    fh = StringIO()
    style = Styles()
    style._set_filehandle(fh)
    workbook = Workbook()
    workbook.add_format(
        {
            "left": 1,
            "right": 1,
            "top": 1,
            "bottom": 1,
            "diag_border": 1,
            "diag_type": 3,
            "left_color": "red",
            "right_color": "red",
            "top_color": "red",
            "bottom_color": "red",
            "diag_color": "red",
        }
    )
    workbook._set_default_xf_indices()
    workbook._prepare_format_properties()
    style._set_style_properties(
        [
            workbook.xf_formats,
            workbook.palette,
            workbook.font_count,
            workbook.num_formats,
            workbook.border_count,
            workbook.fill_count,
            workbook.custom_colors,
            workbook.dxf_formats,
            workbook.has_comments,
        ]
    )
    style._assemble_xml_file()
    workbook.fileclosed = 1
    exp = _xml_to_list(
        """
            <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
            <styleSheet xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main">
              <fonts count="1">
                <font>
                  <sz val="11"/>
                  <color theme="1"/>
                  <name val="Calibri"/>
                  <family val="2"/>
                  <scheme val="minor"/>
                </font>
              </fonts>
              <fills count="2">
                <fill>
                  <patternFill patternType="none"/>
                </fill>
                <fill>
                  <patternFill patternType="gray125"/>
                </fill>
              </fills>
              <borders count="2">
                <border>
                  <left/>
                  <right/>
                  <top/>
                  <bottom/>
                  <diagonal/>
                </border>
                <border diagonalUp="1" diagonalDown="1">
                  <left style="thin">
                    <color rgb="FFFF0000"/>
                  </left>
                  <right style="thin">
                    <color rgb="FFFF0000"/>
                  </right>
                  <top style="thin">
                    <color rgb="FFFF0000"/>
                  </top>
                  <bottom style="thin">
                    <color rgb="FFFF0000"/>
                  </bottom>
                  <diagonal style="thin">
                    <color rgb="FFFF0000"/>
                  </diagonal>
                </border>
              </borders>
              <cellStyleXfs count="1">
                <xf numFmtId="0" fontId="0" fillId="0" borderId="0"/>
              </cellStyleXfs>
              <cellXfs count="2">
                <xf numFmtId="0" fontId="0" fillId="0" borderId="0" xfId="0"/>
                <xf numFmtId="0" fontId="0" fillId="0" borderId="1" xfId="0" applyBorder="1"/>
              </cellXfs>
              <cellStyles count="1">
                <cellStyle name="Normal" xfId="0" builtinId="0"/>
              </cellStyles>
              <dxfs count="0"/>
              <tableStyles count="0" defaultTableStyle="TableStyleMedium9" defaultPivotStyle="PivotStyleLight16"/>
            </styleSheet>
            """
    )
    got = _xml_to_list(fh.getvalue())
    self.assertEqual(got, exp)