| /* |
| * Copyright 2022 Google LLC |
| * |
| * 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 com.google.android.libraries.mobiledatadownload; |
| |
| import static com.google.common.truth.Truth.assertThat; |
| import static com.google.common.util.concurrent.Futures.immediateCancelledFuture; |
| import static com.google.common.util.concurrent.Futures.immediateFailedFuture; |
| import static com.google.common.util.concurrent.Futures.immediateVoidFuture; |
| import static org.junit.Assert.assertThrows; |
| |
| import com.google.android.libraries.mobiledatadownload.DownloadException.DownloadResultCode; |
| import com.google.common.base.Optional; |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.util.concurrent.FutureCallback; |
| import com.google.common.util.concurrent.ListenableFuture; |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.concurrent.CancellationException; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.atomic.AtomicInteger; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.robolectric.RobolectricTestRunner; |
| |
| /** Tests for {@link AggregateException}. */ |
| @RunWith(RobolectricTestRunner.class) |
| public class AggregateExceptionTest { |
| @Test |
| public void unwrapException_recursivelyUnwrapExecutionException() { |
| DownloadException downloadException = |
| DownloadException.builder().setDownloadResultCode(DownloadResultCode.UNKNOWN_ERROR).build(); |
| ExecutionException executionException1 = new ExecutionException(downloadException); |
| ExecutionException executionException2 = new ExecutionException(executionException1); |
| ExecutionException executionException3 = new ExecutionException(executionException2); |
| |
| Throwable throwable = AggregateException.unwrapException(executionException3); |
| assertThat(throwable).isEqualTo(downloadException); |
| assertThat(throwable).hasMessageThat().contains("UNKNOWN_ERROR"); |
| assertThat(throwable).hasCauseThat().isNull(); |
| } |
| |
| @Test |
| public void unwrapException_keepOtherExceptions() { |
| NullPointerException nullPointerException = new NullPointerException("NPE"); |
| DownloadException downloadException = |
| DownloadException.builder() |
| .setDownloadResultCode(DownloadResultCode.UNKNOWN_ERROR) |
| .setCause(nullPointerException) |
| .build(); |
| |
| Throwable throwable = AggregateException.unwrapException(downloadException); |
| assertThat(throwable).isEqualTo(downloadException); |
| assertThat(throwable).hasMessageThat().contains("UNKNOWN_ERROR"); |
| assertThat(throwable).hasCauseThat().isEqualTo(nullPointerException); |
| } |
| |
| @Test |
| public void throwableToString_maxCauseDepthCutoff() { |
| Throwable throwable = |
| new IOException( |
| "One", |
| new IOException( |
| "Two", |
| new IOException( |
| "Three", |
| new IOException("Four", new IOException("Five", new IOException("Six")))))); |
| assertThat(AggregateException.throwableToString(throwable)) |
| .isEqualTo( |
| "java.io.IOException: One" |
| + "\nCaused by: java.io.IOException: Two" |
| + "\nCaused by: java.io.IOException: Three" |
| + "\nCaused by: java.io.IOException: Four" |
| + "\nCaused by: java.io.IOException: Five" |
| + "\n(...)"); |
| } |
| |
| @Test |
| public void throwIfFailed_multipleExceptions() { |
| List<ListenableFuture<Void>> futures = new ArrayList<>(); |
| |
| // First 10 futures failed. |
| for (int i = 0; i < 10; i++) { |
| futures.add( |
| immediateFailedFuture( |
| DownloadException.builder() |
| .setDownloadResultCode(DownloadResultCode.UNKNOWN_ERROR) |
| .setMessage(String.format("ERROR_#%d", i + 1)) |
| .build())); |
| } |
| // Next 10 futures are canceled. |
| for (int i = 0; i < 10; i++) { |
| futures.add(immediateCancelledFuture()); |
| } |
| // The remaining 10 futures succeeded. |
| for (int i = 0; i < 10; i++) { |
| futures.add(immediateVoidFuture()); |
| } |
| |
| AggregateException exception = |
| assertThrows( |
| AggregateException.class, () -> AggregateException.throwIfFailed(futures, "Failed")); |
| ImmutableList<Throwable> failures = exception.getFailures(); |
| assertThat(failures).hasSize(20); |
| |
| for (int i = 0; i < 10; i++) { |
| assertThat(failures.get(i)).isNotNull(); |
| assertThat(failures.get(i)).isInstanceOf(DownloadException.class); |
| assertThat(failures.get(i)).hasMessageThat().contains("ERROR"); |
| } |
| for (int i = 10; i < 20; i++) { |
| assertThat(failures.get(i)).isNotNull(); |
| assertThat(failures.get(i)).isInstanceOf(CancellationException.class); |
| } |
| } |
| |
| @Test |
| public void throwIfFailed_withCallback_invokesCallback() throws Exception { |
| List<ListenableFuture<Void>> futures = new ArrayList<>(); |
| |
| // First 10 futures failed. |
| for (int i = 0; i < 10; i++) { |
| futures.add( |
| immediateFailedFuture( |
| DownloadException.builder() |
| .setDownloadResultCode(DownloadResultCode.UNKNOWN_ERROR) |
| .setMessage(String.format("ERROR_#%d", i + 1)) |
| .build())); |
| } |
| // Next 10 futures are canceled. |
| for (int i = 0; i < 10; i++) { |
| futures.add(immediateCancelledFuture()); |
| } |
| // The remaining 10 futures succeeded. |
| for (int i = 0; i < 10; i++) { |
| futures.add(immediateVoidFuture()); |
| } |
| |
| AtomicInteger successCount = new AtomicInteger(0); |
| AtomicInteger failureCount = new AtomicInteger(0); |
| AggregateException exception = |
| assertThrows( |
| AggregateException.class, |
| () -> |
| AggregateException.throwIfFailed( |
| futures, |
| Optional.of( |
| new FutureCallback<Void>() { |
| @Override |
| public void onSuccess(Void unused) { |
| successCount.getAndIncrement(); |
| } |
| |
| @Override |
| public void onFailure(Throwable t) { |
| failureCount.getAndIncrement(); |
| } |
| }), |
| "Failed")); |
| |
| // Make sure that onSuccess is called 10 times, and onFailure is called 20 times. |
| assertThat(exception.getFailures()).hasSize(20); |
| assertThat(successCount.get()).isEqualTo(10); |
| assertThat(failureCount.get()).isEqualTo(20); |
| } |
| } |