| /* |
| * 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; |
| } |
| |
| @Override |
| public void showDuration(boolean enabled) { |
| // not implemented |
| } |
| } |
| } |