main/src/test/java/org/apache/poi/TestJDK12.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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       http://www.apache.org/licenses/LICENSE-2.0

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package org.apache.poi;

import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;

import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.font.TextLayout;
import java.awt.image.BufferedImage;
import java.text.AttributedString;

import org.junit.jupiter.api.Test;

/**
 * Minimal Test-Class found when running the Apache POI regression tests.
 *
 * This reproduces a crash introduced in JDK 12-ea+28 and JDK 13-ea+4
 *
 * This works in recent JDK 8, JDK 11 and at least up to JDK 12-ea+20
 *
 * https://bugs.openjdk.java.net/browse/JDK-8217768
 *
 * Should be fixed in JDK 12-ea+29 and JDK 13-ea+5
 */
class TestJDK12 {
    @Test
    void test() {
        assertDoesNotThrow(() -> {
            BufferedImage img = new BufferedImage(100, 100, BufferedImage.TYPE_INT_ARGB);
            Graphics2D graphics = img.createGraphics();
            graphics.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
            graphics.scale(200, 1);

            new TextLayout(new AttributedString("agriculture").getIterator(), graphics.getFontRenderContext());

            graphics.dispose();
            img.flush();
        });
    }

}