src/ooxml/testcases/org/apache/poi/xssf/usermodel/TestTableStyles.java

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   this work for additional information regarding copyright ownership.
   The ASF licenses this file to You under the Apache License, Version 2.0
   (the "License"); you may not use this file except in compliance with
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package org.apache.poi.xssf.usermodel;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertTrue;

import org.apache.poi.ss.usermodel.DifferentialStyleProvider;
import org.apache.poi.ss.usermodel.FontFormatting;
import org.apache.poi.ss.usermodel.PatternFormatting;
import org.apache.poi.ss.usermodel.Table;
import org.apache.poi.ss.usermodel.TableStyle;
import org.apache.poi.ss.usermodel.TableStyleInfo;
import org.apache.poi.ss.usermodel.TableStyleType;
import org.apache.poi.xssf.XSSFTestDataSamples;
import org.junit.jupiter.api.Test;

/**
 * Test built-in table styles
 */
class TestTableStyles {

    /**
     * Test that a built-in style is initialized properly
     */
    @Test
    void testBuiltinStyleInit() {
        TableStyle style = XSSFBuiltinTableStyle.TableStyleMedium2.getStyle();
        assertNotNull(style, "no style found for Medium2");
        assertNull(style.getStyle(TableStyleType.blankRow), "Should not have style info for blankRow");
        DifferentialStyleProvider headerRow = style.getStyle(TableStyleType.headerRow);
        assertNotNull(headerRow, "no header row style");
        FontFormatting font = headerRow.getFontFormatting();
        assertNotNull(font, "No header row font formatting");
        assertTrue(font.isBold(), "header row not bold");
        PatternFormatting fill = headerRow.getPatternFormatting();
        assertNotNull(fill, "No header fill");
        assertEquals(4, ((XSSFColor) fill.getFillBackgroundColorColor()).getTheme(), "wrong header fill");
    }

    @Test
    void testCustomStyle() throws Exception {
        try (XSSFWorkbook wb = XSSFTestDataSamples.openSampleWorkbook("tableStyle.xlsx")) {
            Table table = wb.getTable("Table1");
            assertNotNull(table, "missing table");

            TableStyleInfo style = table.getStyle();
            assertNotNull(style, "Missing table style info");
            assertNotNull(style.getStyle(), "Missing table style");
            assertEquals("TestTableStyle", style.getName(), "Wrong name");
            assertEquals("TestTableStyle", style.getStyle().getName(), "Wrong name");

            DifferentialStyleProvider firstColumn = style.getStyle().getStyle(TableStyleType.firstColumn);
            assertNotNull(firstColumn, "no first column style");
            FontFormatting font = firstColumn.getFontFormatting();
            assertNotNull(font, "no first col font");
            assertTrue(font.isBold(), "wrong first col bold");
        }
    }
}