test/jdk/java/awt/font/GlyphVector/TestStandardGlyphVectorBug.java

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import java.awt.Font;
import java.awt.font.FontRenderContext;
import java.awt.font.GlyphVector;
import java.awt.geom.AffineTransform;
import java.awt.geom.Point2D;

/**
 * @test
 * @bug 7160052
 * @run main TestStandardGlyphVectorBug
 * @summary GlyphVector.setGlyphPosition should not throw an exception on valid input
 */
public class TestStandardGlyphVectorBug
{
    public static void main(String[] args)
    {
        Font defaultFont = new Font(null);
        FontRenderContext defaultFrc = new FontRenderContext(new AffineTransform(),
                                                             true, true);
        GlyphVector gv = defaultFont.createGlyphVector(defaultFrc, "test");

        //this causes the bounds to be cached
        //which is necessary to trigger the bug
        gv.getGlyphLogicalBounds(0);

        //this correctly gets the position of the overall advance
        Point2D glyphPosition = gv.getGlyphPosition(gv.getNumGlyphs());

        // this sets the position of the overall advance,
        // but also incorrectly tries to clear the bounds cache
        // of a specific glyph indexed by the glyphIndex parameter
        // even if the glyphIndex represents the overall advance
        // (i.e. if glyphIndex == getNumGlyphs())
        gv.setGlyphPosition(gv.getNumGlyphs(), glyphPosition);
    }
}