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