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120 lines
4.0 KiB
120 lines
4.0 KiB
// CircleToolTest.java
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// Copyright 2018 by luccioman; https://github.com/luccioman
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//
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// This is a part of YaCy, a peer-to-peer based web search engine
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//
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// LICENSE
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package net.yacy.visualization;
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import java.io.IOException;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.nio.file.Paths;
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import java.util.ArrayList;
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import java.util.concurrent.Callable;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.Executors;
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import java.util.concurrent.Future;
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import org.bouncycastle.util.Arrays;
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import org.junit.Assert;
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import org.junit.Test;
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import net.yacy.peers.graphics.EncodedImage;
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/**
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* Unit tests for the {@link CircleTool} class.
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*/
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public class CircleToolTest {
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/**
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* Check circle function consistency when run on multiple concurrent threads.
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*
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* @throws Exception when an unexpected error occurred
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*/
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@Test
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public void testCircleConcurrentConsistency() throws Exception {
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final int concurrency = 20;
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final int side = 600;
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final String ext = "png";
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final Callable<byte[]> drawTask = () -> {
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final RasterPlotter raster = new RasterPlotter(side, side, RasterPlotter.DrawMode.MODE_SUB, "FFFFFF");
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for (int radius = side / 4; radius < side / 2; radius++) {
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raster.setColor(RasterPlotter.GREEN);
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CircleTool.circle(raster, side / 2, side / 2, radius, 100);
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raster.setColor(RasterPlotter.RED);
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CircleTool.circle(raster, side / 2, side / 2, radius, 0, 45);
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}
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final EncodedImage image = new EncodedImage(raster, ext, true);
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return image.getImage().getBytes();
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};
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/* Generate a reference image without concurrency */
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CircleTool.clearcache();
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final byte[] refImageBytes = drawTask.call();
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/* Write the reference image to the file system to enable manual visual check */
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final Path outputPath = Paths.get(System.getProperty("java.io.tmpdir", ""), "CircleToolTest." + ext);
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try {
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Files.write(outputPath, refImageBytes);
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System.out.println("Wrote CircleTool.circle() test image to file " + outputPath.toAbsolutePath());
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} catch (final IOException e) {
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/*
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* Even if output file writing failed we do not make the test fail as this is
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* not the purpose of the test
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*/
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e.printStackTrace();
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}
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/*
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* Generate the same image multiple times in concurrent threads without initial
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* cache
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*/
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CircleTool.clearcache();
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final ExecutorService executor = Executors.newFixedThreadPool(concurrency);
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final ArrayList<Future<byte[]>> futures = new ArrayList<>();
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for (int i = 0; i < concurrency; i++) {
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futures.add(executor.submit(drawTask));
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}
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try {
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for (final Future<byte[]> future : futures) {
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/* Check that all concurrently generated images are equal to the reference */
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final byte[] imageBytes = future.get();
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if (!Arrays.areEqual(refImageBytes, imageBytes)) {
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/* Write the image in error to file system to enable manual visual check */
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final Path errOutputPath = Paths.get(System.getProperty("java.io.tmpdir", ""),
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"CircleToolTestError." + ext);
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try {
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Files.write(errOutputPath, imageBytes);
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System.out.println(
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"Wrote CircleTool.circle() error image to file " + errOutputPath.toAbsolutePath());
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} catch (final IOException e) {
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e.printStackTrace();
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}
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Assert.fail();
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}
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}
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} finally {
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executor.shutdown();
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}
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}
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}
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