1 /* 2 * Copyright 2022 Google LLC 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.google.android.libraries.mobiledatadownload; 17 18 import static com.google.common.truth.Truth.assertThat; 19 import static com.google.common.util.concurrent.Futures.immediateCancelledFuture; 20 import static com.google.common.util.concurrent.Futures.immediateFailedFuture; 21 import static com.google.common.util.concurrent.Futures.immediateVoidFuture; 22 import static org.junit.Assert.assertThrows; 23 24 import com.google.android.libraries.mobiledatadownload.DownloadException.DownloadResultCode; 25 import com.google.common.base.Optional; 26 import com.google.common.collect.ImmutableList; 27 import com.google.common.util.concurrent.FutureCallback; 28 import com.google.common.util.concurrent.ListenableFuture; 29 import java.io.IOException; 30 import java.util.ArrayList; 31 import java.util.List; 32 import java.util.concurrent.CancellationException; 33 import java.util.concurrent.ExecutionException; 34 import java.util.concurrent.atomic.AtomicInteger; 35 import org.junit.Test; 36 import org.junit.runner.RunWith; 37 import org.robolectric.RobolectricTestRunner; 38 39 /** Tests for {@link AggregateException}. */ 40 @RunWith(RobolectricTestRunner.class) 41 public class AggregateExceptionTest { 42 @Test unwrapException_recursivelyUnwrapExecutionException()43 public void unwrapException_recursivelyUnwrapExecutionException() { 44 DownloadException downloadException = 45 DownloadException.builder().setDownloadResultCode(DownloadResultCode.UNKNOWN_ERROR).build(); 46 ExecutionException executionException1 = new ExecutionException(downloadException); 47 ExecutionException executionException2 = new ExecutionException(executionException1); 48 ExecutionException executionException3 = new ExecutionException(executionException2); 49 50 Throwable throwable = AggregateException.unwrapException(executionException3); 51 assertThat(throwable).isEqualTo(downloadException); 52 assertThat(throwable).hasMessageThat().contains("UNKNOWN_ERROR"); 53 assertThat(throwable).hasCauseThat().isNull(); 54 } 55 56 @Test unwrapException_keepOtherExceptions()57 public void unwrapException_keepOtherExceptions() { 58 NullPointerException nullPointerException = new NullPointerException("NPE"); 59 DownloadException downloadException = 60 DownloadException.builder() 61 .setDownloadResultCode(DownloadResultCode.UNKNOWN_ERROR) 62 .setCause(nullPointerException) 63 .build(); 64 65 Throwable throwable = AggregateException.unwrapException(downloadException); 66 assertThat(throwable).isEqualTo(downloadException); 67 assertThat(throwable).hasMessageThat().contains("UNKNOWN_ERROR"); 68 assertThat(throwable).hasCauseThat().isEqualTo(nullPointerException); 69 } 70 71 @Test throwableToString_maxCauseDepthCutoff()72 public void throwableToString_maxCauseDepthCutoff() { 73 Throwable throwable = 74 new IOException( 75 "One", 76 new IOException( 77 "Two", 78 new IOException( 79 "Three", 80 new IOException("Four", new IOException("Five", new IOException("Six")))))); 81 assertThat(AggregateException.throwableToString(throwable)) 82 .isEqualTo( 83 "java.io.IOException: One" 84 + "\nCaused by: java.io.IOException: Two" 85 + "\nCaused by: java.io.IOException: Three" 86 + "\nCaused by: java.io.IOException: Four" 87 + "\nCaused by: java.io.IOException: Five" 88 + "\n(...)"); 89 } 90 91 @Test throwIfFailed_multipleExceptions()92 public void throwIfFailed_multipleExceptions() { 93 List<ListenableFuture<Void>> futures = new ArrayList<>(); 94 95 // First 10 futures failed. 96 for (int i = 0; i < 10; i++) { 97 futures.add( 98 immediateFailedFuture( 99 DownloadException.builder() 100 .setDownloadResultCode(DownloadResultCode.UNKNOWN_ERROR) 101 .setMessage(String.format("ERROR_#%d", i + 1)) 102 .build())); 103 } 104 // Next 10 futures are canceled. 105 for (int i = 0; i < 10; i++) { 106 futures.add(immediateCancelledFuture()); 107 } 108 // The remaining 10 futures succeeded. 109 for (int i = 0; i < 10; i++) { 110 futures.add(immediateVoidFuture()); 111 } 112 113 AggregateException exception = 114 assertThrows( 115 AggregateException.class, () -> AggregateException.throwIfFailed(futures, "Failed")); 116 ImmutableList<Throwable> failures = exception.getFailures(); 117 assertThat(failures).hasSize(20); 118 119 for (int i = 0; i < 10; i++) { 120 assertThat(failures.get(i)).isNotNull(); 121 assertThat(failures.get(i)).isInstanceOf(DownloadException.class); 122 assertThat(failures.get(i)).hasMessageThat().contains("ERROR"); 123 } 124 for (int i = 10; i < 20; i++) { 125 assertThat(failures.get(i)).isNotNull(); 126 assertThat(failures.get(i)).isInstanceOf(CancellationException.class); 127 } 128 } 129 130 @Test throwIfFailed_withCallback_invokesCallback()131 public void throwIfFailed_withCallback_invokesCallback() throws Exception { 132 List<ListenableFuture<Void>> futures = new ArrayList<>(); 133 134 // First 10 futures failed. 135 for (int i = 0; i < 10; i++) { 136 futures.add( 137 immediateFailedFuture( 138 DownloadException.builder() 139 .setDownloadResultCode(DownloadResultCode.UNKNOWN_ERROR) 140 .setMessage(String.format("ERROR_#%d", i + 1)) 141 .build())); 142 } 143 // Next 10 futures are canceled. 144 for (int i = 0; i < 10; i++) { 145 futures.add(immediateCancelledFuture()); 146 } 147 // The remaining 10 futures succeeded. 148 for (int i = 0; i < 10; i++) { 149 futures.add(immediateVoidFuture()); 150 } 151 152 AtomicInteger successCount = new AtomicInteger(0); 153 AtomicInteger failureCount = new AtomicInteger(0); 154 AggregateException exception = 155 assertThrows( 156 AggregateException.class, 157 () -> 158 AggregateException.throwIfFailed( 159 futures, 160 Optional.of( 161 new FutureCallback<Void>() { 162 @Override 163 public void onSuccess(Void unused) { 164 successCount.getAndIncrement(); 165 } 166 167 @Override 168 public void onFailure(Throwable t) { 169 failureCount.getAndIncrement(); 170 } 171 }), 172 "Failed")); 173 174 // Make sure that onSuccess is called 10 times, and onFailure is called 20 times. 175 assertThat(exception.getFailures()).hasSize(20); 176 assertThat(successCount.get()).isEqualTo(10); 177 assertThat(failureCount.get()).isEqualTo(20); 178 } 179 } 180