src/ooxml/testcases/org/apache/poi/xddf/usermodel/chart/TestXDDFChart.java

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package org.apache.poi.xddf.usermodel.chart;

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

import org.apache.poi.ooxml.POIXMLFactory;
import org.apache.poi.ooxml.POIXMLRelation;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.util.TempFile;
import org.apache.poi.xssf.XSSFTestDataSamples;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.junit.jupiter.api.Test;
import org.openxmlformats.schemas.drawingml.x2006.chart.CTChartSpace;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;

class TestXDDFChart {
    @Test
    void testConstruct() {
        // minimal test to cause ooxml-lite to include all the classes in poi-ooxml-lite
        XDDFChart xddfChart = newXDDFChart();

        assertNotNull(xddfChart.getCTChartSpace());
        assertNotNull(xddfChart.getCTPlotArea());
    }

    @Test
    void testSetExternalId() {
        XDDFChart xddfChart = newXDDFChart();
        CTChartSpace ctChartSpace = xddfChart.getCTChartSpace();

        xddfChart.setExternalId("rid1");
        assertEquals("rid1", ctChartSpace.getExternalData().getId());

        xddfChart.setExternalId("rid2");
        assertEquals("rid2", ctChartSpace.getExternalData().getId());
    }

    @Test
    public void test65016() throws IOException {
        try (XSSFWorkbook wb = XSSFTestDataSamples.openSampleWorkbook("65016.xlsx")) {
            XSSFSheet splitSheet = wb.getSheet("Splits");

            XDDFChart chart = newXDDFChart();
            XDDFChartLegend legend = chart.getOrAddLegend();
            legend.setPosition(LegendPosition.BOTTOM);

            // Use a category axis for the bottom axis.
            XDDFCategoryAxis bottomAxis = chart.createCategoryAxis(AxisPosition.BOTTOM);
            XDDFValueAxis leftAxis = chart.createValueAxis(AxisPosition.LEFT);
            leftAxis.setCrosses(AxisCrosses.AUTO_ZERO);

            XDDFLineChartData data = (XDDFLineChartData) chart.createData(ChartTypes.LINE, bottomAxis, leftAxis);

            // starting row 1 to include description
            XDDFNumericalDataSource<Double> xs = XDDFDataSourcesFactory.fromNumericCellRange(splitSheet,
                    new CellRangeAddress(2, 100, 0, 0));
            XDDFNumericalDataSource<Double> ys1 = XDDFDataSourcesFactory.fromNumericCellRange(splitSheet,
                    new CellRangeAddress(2, 100, 1, 1));

            XDDFLineChartData.Series series = (XDDFLineChartData.Series) data.addSeries(xs, ys1);
            assertEquals(series.categoryData.getPointCount(), xs.getPointCount());

            chart.plot(data);

            File file = TempFile.createTempFile("chart20201220", ".xlsx");
            try {
                try (OutputStream out = new FileOutputStream(file)) {
                    wb.write(out);
                }
            } finally {
                assertTrue(!file.exists() || file.delete());
            }
        }
    }

    private XDDFChart newXDDFChart() {
        return new XDDFChart() {
            @Override
            protected POIXMLRelation getChartRelation() {
                return null;
            }

            @Override
            protected POIXMLRelation getChartWorkbookRelation() {
                return null;
            }

            @Override
            protected POIXMLFactory getChartFactory() {
                return null;
            }
        };
    }
}