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- /*
- * Copyright (C) 2010, Google Inc. and others
- *
- * This program and the accompanying materials are made available under the
- * terms of the Eclipse Distribution License v. 1.0 which is available at
- * https://www.eclipse.org/org/documents/edl-v10.php.
- *
- * SPDX-License-Identifier: BSD-3-Clause
- */
-
- 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(() -> {
- 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() {
- @Override
- 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;
-
- @Override
- public void update(int completed) {
- value += completed;
- }
-
- @Override
- public void start(int totalTasks) {
- value = totalTasks;
- }
-
- @Override
- public void beginTask(String title, int totalWork) {
- taskTitle = title;
- value = totalWork;
- }
-
- @Override
- public void endTask() {
- taskTitle = null;
- value = 0;
- }
-
- @Override
- public boolean isCancelled() {
- return false;
- }
- }
- }
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