Shawn O. Pearce
14 years ago
committed by
Code Review
4 changed files with 299 additions and 36 deletions
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/* |
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* Copyright (C) 2010, Google Inc. |
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* and other copyright owners as documented in the project's IP log. |
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* |
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* This program and the accompanying materials are made available |
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* under the terms of the Eclipse Distribution License v1.0 which |
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* accompanies this distribution, is reproduced below, and is |
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* available at http://www.eclipse.org/org/documents/edl-v10.php
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* |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or |
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* without modification, are permitted provided that the following |
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* conditions are met: |
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* |
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* - Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* - Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer in the documentation and/or other materials provided |
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* with the distribution. |
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* |
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* - Neither the name of the Eclipse Foundation, Inc. nor the |
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* names of its contributors may be used to endorse or promote |
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* products derived from this software without specific prior |
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* written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND |
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, |
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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package org.eclipse.jgit.lib; |
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import java.util.concurrent.CountDownLatch; |
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import java.util.concurrent.TimeUnit; |
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import junit.framework.TestCase; |
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public class ThreadSafeProgressMonitorTest extends TestCase { |
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public void testFailsMethodsOnBackgroundThread() |
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throws InterruptedException { |
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final MockProgressMonitor mock = new MockProgressMonitor(); |
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final ThreadSafeProgressMonitor pm = new ThreadSafeProgressMonitor(mock); |
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runOnThread(new Runnable() { |
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public void run() { |
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try { |
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pm.start(1); |
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fail("start did not fail on background thread"); |
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} catch (IllegalStateException notMainThread) { |
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// Expected result
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} |
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try { |
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pm.beginTask("title", 1); |
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fail("beginTask did not fail on background thread"); |
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} catch (IllegalStateException notMainThread) { |
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// Expected result
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} |
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try { |
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pm.endTask(); |
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fail("endTask did not fail on background thread"); |
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} catch (IllegalStateException notMainThread) { |
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// Expected result
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} |
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} |
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}); |
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// Ensure we didn't alter the mock above when checking threads.
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assertNull(mock.taskTitle); |
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assertEquals(0, mock.value); |
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} |
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public void testMethodsOkOnMainThread() { |
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final MockProgressMonitor mock = new MockProgressMonitor(); |
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final ThreadSafeProgressMonitor pm = new ThreadSafeProgressMonitor(mock); |
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pm.start(1); |
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assertEquals(1, mock.value); |
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pm.beginTask("title", 42); |
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assertEquals("title", mock.taskTitle); |
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assertEquals(42, mock.value); |
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pm.update(1); |
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assertEquals(43, mock.value); |
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pm.update(2); |
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assertEquals(45, mock.value); |
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pm.endTask(); |
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assertNull(mock.taskTitle); |
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assertEquals(0, mock.value); |
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} |
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public void testUpdateOnBackgroundThreads() throws InterruptedException { |
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final MockProgressMonitor mock = new MockProgressMonitor(); |
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final ThreadSafeProgressMonitor pm = new ThreadSafeProgressMonitor(mock); |
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pm.startWorker(); |
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final CountDownLatch doUpdate = new CountDownLatch(1); |
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final CountDownLatch didUpdate = new CountDownLatch(1); |
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final CountDownLatch doEndWorker = new CountDownLatch(1); |
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final Thread bg = new Thread() { |
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public void run() { |
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assertFalse(pm.isCancelled()); |
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await(doUpdate); |
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pm.update(2); |
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didUpdate.countDown(); |
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await(doEndWorker); |
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pm.update(1); |
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pm.endWorker(); |
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} |
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}; |
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bg.start(); |
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pm.pollForUpdates(); |
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assertEquals(0, mock.value); |
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doUpdate.countDown(); |
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await(didUpdate); |
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pm.pollForUpdates(); |
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assertEquals(2, mock.value); |
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doEndWorker.countDown(); |
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pm.waitForCompletion(); |
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assertEquals(3, mock.value); |
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} |
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private static void await(CountDownLatch cdl) { |
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try { |
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assertTrue("latch released", cdl.await(1000, TimeUnit.MILLISECONDS)); |
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} catch (InterruptedException ie) { |
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fail("Did not expect to be interrupted"); |
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} |
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} |
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private static void runOnThread(Runnable task) throws InterruptedException { |
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Thread t = new Thread(task); |
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t.start(); |
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t.join(1000); |
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assertFalse("thread has stopped", t.isAlive()); |
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} |
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private static class MockProgressMonitor implements ProgressMonitor { |
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String taskTitle; |
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int value; |
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public void update(int completed) { |
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value += completed; |
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} |
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public void start(int totalTasks) { |
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value = totalTasks; |
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} |
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public void beginTask(String title, int totalWork) { |
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taskTitle = title; |
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value = totalWork; |
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} |
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public void endTask() { |
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taskTitle = null; |
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value = 0; |
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} |
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public boolean isCancelled() { |
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return false; |
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} |
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} |
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} |
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