| /* |
| * Copyright 2018 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 androidx.loader.content; |
| |
| import static org.junit.Assert.fail; |
| |
| import android.os.AsyncTask; |
| |
| import androidx.annotation.NonNull; |
| import androidx.test.ext.junit.runners.AndroidJUnit4; |
| import androidx.test.filters.LargeTest; |
| import androidx.test.platform.app.InstrumentationRegistry; |
| |
| 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 { |
| |
| private ModernAsyncTask mModernAsyncTask; |
| |
| /** |
| * Test to ensure that onCancelled is always called, even if doInBackground throws an exception. |
| */ |
| @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() { |
| // we need to class load AsyncTask on API 15 in a thread with Looper, |
| // because sInternalHandler was initialized as static field. |
| // https://github.com/aosp-mirror/platform_frameworks_base/blob/ics-mr1/core/java/android/os/AsyncTask.java#L190 |
| //noinspection unused |
| Executor unused = AsyncTask.THREAD_POOL_EXECUTOR; |
| mModernAsyncTask = new ModernAsyncTask() { |
| @Override |
| protected Object doInBackground() { |
| readyToCancel.countDown(); |
| try { |
| readyToThrow.await(); |
| } catch (InterruptedException ignored) { } |
| // This exception is expected to be caught and ignored |
| throw new RuntimeException(); |
| } |
| |
| @Override |
| protected void onCancelled(Object o) { |
| calledOnCancelled.countDown(); |
| } |
| }; |
| } |
| }); |
| |
| mModernAsyncTask.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR); |
| 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. |
| */ |
| @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() { |
| 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"); |
| } |
| } |
| } |