def METHOD_NAME(self):
    """Test writing a worksheet with conditional formatting."""
    self.maxDiff = None
    fh = StringIO()
    worksheet = Worksheet()
    worksheet._set_filehandle(fh)
    worksheet.select()
    worksheet.write("A1", 1)
    worksheet.write("A2", 2)
    worksheet.write("A3", 3)
    worksheet.write("A4", 4)
    worksheet.write("A5", 5)
    worksheet.write("A6", 6)
    worksheet.write("A7", 7)
    worksheet.write("A8", 8)
    worksheet.write("A9", 9)
    worksheet.write("A10", 10)
    worksheet.write("A11", 11)
    worksheet.write("A12", 12)
    worksheet.conditional_format(
        "A1:A12",
        {
            "type": "3_color_scale",
            "multi_range": "$A$3:$A$4 A1 A6:$A$8 $A10 A$12",
        },
    )
    worksheet._assemble_xml_file()
    exp = _xml_to_list(
        """
            <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
            <worksheet xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships">
              <dimension ref="A1:A12"/>
              <sheetViews>
                <sheetView tabSelected="1" workbookViewId="0"/>
              </sheetViews>
              <sheetFormatPr defaultRowHeight="15"/>
              <sheetData>
                <row r="1" spans="1:1">
                  <c r="A1">
                    <v>1</v>
                  </c>
                </row>
                <row r="2" spans="1:1">
                  <c r="A2">
                    <v>2</v>
                  </c>
                </row>
                <row r="3" spans="1:1">
                  <c r="A3">
                    <v>3</v>
                  </c>
                </row>
                <row r="4" spans="1:1">
                  <c r="A4">
                    <v>4</v>
                  </c>
                </row>
                <row r="5" spans="1:1">
                  <c r="A5">
                    <v>5</v>
                  </c>
                </row>
                <row r="6" spans="1:1">
                  <c r="A6">
                    <v>6</v>
                  </c>
                </row>
                <row r="7" spans="1:1">
                  <c r="A7">
                    <v>7</v>
                  </c>
                </row>
                <row r="8" spans="1:1">
                  <c r="A8">
                    <v>8</v>
                  </c>
                </row>
                <row r="9" spans="1:1">
                  <c r="A9">
                    <v>9</v>
                  </c>
                </row>
                <row r="10" spans="1:1">
                  <c r="A10">
                    <v>10</v>
                  </c>
                </row>
                <row r="11" spans="1:1">
                  <c r="A11">
                    <v>11</v>
                  </c>
                </row>
                <row r="12" spans="1:1">
                  <c r="A12">
                    <v>12</v>
                  </c>
                </row>
              </sheetData>
              <conditionalFormatting sqref="A3:A4 A1 A6:A8 A10 A12">
                <cfRule type="colorScale" priority="1">
                  <colorScale>
                    <cfvo type="min" val="0"/>
                    <cfvo type="percentile" val="50"/>
                    <cfvo type="max" val="0"/>
                    <color rgb="FFF8696B"/>
                    <color rgb="FFFFEB84"/>
                    <color rgb="FF63BE7B"/>
                  </colorScale>
                </cfRule>
              </conditionalFormatting>
              <pageMargins left="0.7" right="0.7" top="0.75" bottom="0.75" header="0.3" footer="0.3"/>
            </worksheet>
            """
    )
    got = _xml_to_list(fh.getvalue())
    self.assertEqual(got, exp)