/* * Copyright (C) 2016 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.support.v4.content; import static org.junit.Assert.fail; import android.support.annotation.NonNull; import android.support.test.InstrumentationRegistry; import android.support.test.filters.LargeTest; import android.support.test.runner.AndroidJUnit4; import org.junit.Test; import org.junit.runner.RunWith; import java.util.concurrent.CountDownLatch; import java.util.concurrent.Executor; import java.util.concurrent.TimeUnit; @RunWith(AndroidJUnit4.class) public class ModernAsyncTaskTest { ModernAsyncTask mModernAsyncTask; /** * Test to ensure that onCancelled is always called, even if doInBackground throws an exception. * * @throws Throwable */ @LargeTest @Test public void testCancellationWithException() throws Throwable { final CountDownLatch readyToCancel = new CountDownLatch(1); final CountDownLatch readyToThrow = new CountDownLatch(1); final CountDownLatch calledOnCancelled = new CountDownLatch(1); InstrumentationRegistry.getInstrumentation().runOnMainSync(new Runnable() { @Override public void run() { mModernAsyncTask = new ModernAsyncTask() { @Override protected Object doInBackground(Object[] params) { readyToCancel.countDown(); try { readyToThrow.await(); } catch (InterruptedException e) {} // This exception is expected to be caught and ignored throw new RuntimeException(); } @Override protected void onCancelled(Object o) { calledOnCancelled.countDown(); } }; } }); mModernAsyncTask.execute(); if (!readyToCancel.await(5, TimeUnit.SECONDS)) { fail("Test failure: doInBackground did not run in time."); } mModernAsyncTask.cancel(false); readyToThrow.countDown(); if (!calledOnCancelled.await(5, TimeUnit.SECONDS)) { fail("onCancelled not called!"); } } /** * Test to ensure that onCancelled is always called instead of onPostExecute when the exception * is not suppressed by cancelling the task. * * @throws Throwable */ @LargeTest @Test public void testException() throws Throwable { final CountDownLatch calledOnCancelled = new CountDownLatch(1); InstrumentationRegistry.getInstrumentation().runOnMainSync(new Runnable() { @Override public void run() { mModernAsyncTask = new ModernAsyncTask() { @Override protected Object doInBackground(Object[] params) { throw new RuntimeException(); } @Override protected void onPostExecute(Object o) { fail("onPostExecute should not be called"); } @Override protected void onCancelled(Object o) { calledOnCancelled.countDown(); } }; } }); mModernAsyncTask.executeOnExecutor(new Executor() { @Override public void execute(@NonNull Runnable command) { try { command.run(); fail("Exception not thrown"); } catch (Throwable tr) { // expected } } }); if (!calledOnCancelled.await(5, TimeUnit.SECONDS)) { fail("onCancelled not called"); } } }