org.sonar.api.charts.AbstractChartTest.java Source code

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Here is the source code for org.sonar.api.charts.AbstractChartTest.java

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/*
 * Sonar, open source software quality management tool.
 * Copyright (C) 2008-2012 SonarSource
 * mailto:contact AT sonarsource DOT com
 *
 * Sonar is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * Sonar is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with Sonar; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02
 */
package org.sonar.api.charts;

import org.apache.commons.io.FileUtils;
import org.jfree.chart.ChartUtilities;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;

import javax.swing.JPanel;

import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

import static org.junit.Assert.assertTrue;

public abstract class AbstractChartTest {
    protected void assertChartSizeGreaterThan(BufferedImage img, int size) throws IOException {
        ByteArrayOutputStream output = new ByteArrayOutputStream();
        ChartUtilities.writeBufferedImageAsPNG(output, img);
        assertTrue("PNG size in bits=" + output.size(), output.size() > size);
    }

    protected void assertChartSizeLesserThan(BufferedImage img, int size) throws IOException {
        ByteArrayOutputStream output = new ByteArrayOutputStream();
        ChartUtilities.writeBufferedImageAsPNG(output, img);
        assertTrue("PNG size in bits=" + output.size(), output.size() < size);
    }

    protected void saveChart(BufferedImage img, String name) throws IOException {
        File target = new File("target/tmp-chart", name);
        FileUtils.forceMkdir(target.getParentFile());
        ByteArrayOutputStream imgOutput = new ByteArrayOutputStream();
        ChartUtilities.writeBufferedImageAsPNG(imgOutput, img);
        OutputStream out = new FileOutputStream(target);
        out.write(imgOutput.toByteArray());
        out.close();

    }

    protected static void displayTestPanel(BufferedImage image) {
        ApplicationFrame frame = new ApplicationFrame("testframe");
        BufferedPanel imgPanel = new BufferedPanel(image);
        frame.setContentPane(imgPanel);
        frame.pack();
        RefineryUtilities.centerFrameOnScreen(frame);
        frame.setVisible(true);
    }

    protected static Date stringToDate(String sDate) throws ParseException {
        SimpleDateFormat sdf = new SimpleDateFormat("dd-MM-yy hh'h'mm");
        return sdf.parse(sDate);
    }

    private static class BufferedPanel extends JPanel {
        private final BufferedImage chartImage;

        public BufferedPanel(BufferedImage chartImage) {
            this.chartImage = chartImage;
        }

        @Override
        protected void paintComponent(Graphics graphics) {
            super.paintComponent(graphics);
            graphics.drawImage(chartImage, 0, 0, null);
        }

        @Override
        public Dimension getPreferredSize() {
            return new Dimension(chartImage.getWidth(), chartImage.getHeight());
        }
    }
}