| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.arch.core.executor.testing; |
| |
| import static org.hamcrest.CoreMatchers.is; |
| import static org.hamcrest.MatcherAssert.assertThat; |
| |
| import android.arch.core.executor.ArchTaskExecutor; |
| import android.support.test.filters.MediumTest; |
| import android.support.test.runner.AndroidJUnit4; |
| |
| import org.junit.Rule; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.Semaphore; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.TimeoutException; |
| |
| @RunWith(AndroidJUnit4.class) |
| @MediumTest |
| public class CountingTaskExecutorRuleTest { |
| private final Semaphore mOnIdleCount = new Semaphore(0); |
| |
| @Rule |
| public CountingTaskExecutorRule mRule = new CountingTaskExecutorRule() { |
| @Override |
| protected void onIdle() { |
| super.onIdle(); |
| mOnIdleCount.release(1); |
| } |
| }; |
| |
| @Test |
| public void initialIdle() { |
| assertThat(mRule.isIdle(), is(true)); |
| } |
| |
| @Test |
| public void busyIO() throws InterruptedException { |
| LatchRunnable task = runOnIO(); |
| singleTaskTest(task); |
| } |
| |
| @Test |
| public void busyMain() throws InterruptedException { |
| LatchRunnable task = runOnMain(); |
| singleTaskTest(task); |
| } |
| |
| @Test |
| public void multipleTasks() throws InterruptedException { |
| List<LatchRunnable> latches = new ArrayList<>(10); |
| for (int i = 0; i < 5; i++) { |
| latches.add(runOnIO()); |
| latches.add(runOnMain()); |
| } |
| assertNotIdle(); |
| for (int i = 0; i < 9; i++) { |
| latches.get(i).start(); |
| } |
| for (int i = 0; i < 9; i++) { |
| latches.get(i).await(); |
| } |
| assertNotIdle(); |
| |
| LatchRunnable another = runOnIO(); |
| latches.get(9).startAndFinish(); |
| assertNotIdle(); |
| |
| another.startAndFinish(); |
| assertBecomeIdle(); |
| |
| LatchRunnable oneMore = runOnMain(); |
| |
| assertNotIdle(); |
| |
| oneMore.startAndFinish(); |
| assertBecomeIdle(); |
| } |
| |
| private void assertNotIdle() throws InterruptedException { |
| assertThat(mOnIdleCount.tryAcquire(300, TimeUnit.MILLISECONDS), is(false)); |
| assertThat(mRule.isIdle(), is(false)); |
| } |
| |
| private void assertBecomeIdle() throws InterruptedException { |
| assertThat(mOnIdleCount.tryAcquire(1, TimeUnit.SECONDS), is(true)); |
| assertThat(mRule.isIdle(), is(true)); |
| } |
| |
| private void singleTaskTest(LatchRunnable task) |
| throws InterruptedException { |
| assertNotIdle(); |
| task.startAndFinish(); |
| assertBecomeIdle(); |
| } |
| |
| private LatchRunnable runOnIO() { |
| LatchRunnable latchRunnable = new LatchRunnable(); |
| ArchTaskExecutor.getInstance().executeOnDiskIO(latchRunnable); |
| return latchRunnable; |
| } |
| |
| private LatchRunnable runOnMain() { |
| LatchRunnable latchRunnable = new LatchRunnable(); |
| ArchTaskExecutor.getInstance().executeOnMainThread(latchRunnable); |
| return latchRunnable; |
| } |
| |
| @Test |
| public void drainFailure() throws InterruptedException { |
| runOnIO(); |
| try { |
| mRule.drainTasks(300, TimeUnit.MILLISECONDS); |
| throw new AssertionError("drain should fail"); |
| } catch (TimeoutException ignored) { |
| } |
| } |
| |
| @Test |
| public void drainSuccess() throws TimeoutException, InterruptedException { |
| final LatchRunnable task = runOnIO(); |
| new Thread(new Runnable() { |
| @Override |
| public void run() { |
| try { |
| Thread.sleep(300); |
| } catch (InterruptedException ignored) { |
| } |
| task.start(); |
| } |
| }).start(); |
| mRule.drainTasks(1, TimeUnit.SECONDS); |
| } |
| |
| private static class LatchRunnable implements Runnable { |
| private final CountDownLatch mStart = new CountDownLatch(1); |
| private final CountDownLatch mEnd = new CountDownLatch(1); |
| |
| @Override |
| public void run() { |
| try { |
| mStart.await(10, TimeUnit.SECONDS); |
| mEnd.countDown(); |
| } catch (InterruptedException e) { |
| throw new AssertionError(e); |
| } |
| } |
| |
| void await() throws InterruptedException { |
| mEnd.await(10, TimeUnit.SECONDS); |
| } |
| |
| void start() { |
| mStart.countDown(); |
| } |
| |
| private void startAndFinish() throws InterruptedException { |
| start(); |
| await(); |
| } |
| } |
| } |