1 /* 2 * Copyright (C) 2021 The Android Open Source Project 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 17 package android.car.test.mocks; 18 19 import static com.google.common.truth.Truth.assertThat; 20 21 import static org.mockito.Mockito.doAnswer; 22 import static org.mockito.Mockito.when; 23 24 import org.junit.Test; 25 import org.junit.runner.RunWith; 26 import org.mockito.Mock; 27 import org.mockito.junit.MockitoJUnitRunner; 28 29 import java.util.concurrent.CountDownLatch; 30 import java.util.concurrent.TimeUnit; 31 import java.util.concurrent.atomic.AtomicBoolean; 32 33 @RunWith(MockitoJUnitRunner.class) 34 public final class BlockingAnswerTest { 35 36 private static final long TIMEOUT_MS = 2_000L; 37 38 @Mock private SomeService mService; 39 40 @Test testForReturn()41 public void testForReturn() throws Exception { 42 CountDownLatch latch = new CountDownLatch(1); 43 int returnValue = 1; 44 when(mService.intMethod()).thenReturn(returnValue); 45 final AtomicBoolean invoked = new AtomicBoolean(); 46 BlockingAnswer<Integer> blockingAnswer = BlockingAnswer.forReturn(TIMEOUT_MS, inv -> { 47 invoked.set(true); 48 latch.countDown(); 49 }, returnValue); 50 when(mService.intMethod()).thenAnswer(blockingAnswer); 51 52 mService.intMethod(); 53 54 // By unblocking we release the code triggered by blocking answer to run on a 55 // separated thread. 56 blockingAnswer.unblock(); 57 58 // Since code from BlockingAnswer is triggered in a separated thread, will use the 59 // countdown latch to sync up. 60 latch.await(1, TimeUnit.SECONDS); 61 assertThat(invoked.get()).isTrue(); 62 } 63 64 @Test testForVoidReturn()65 public void testForVoidReturn() throws Exception { 66 CountDownLatch latch = new CountDownLatch(1); 67 final AtomicBoolean invoked = new AtomicBoolean(); 68 BlockingAnswer<Void> blockingAnswer = BlockingAnswer.forVoidReturn(TIMEOUT_MS, inv -> { 69 invoked.set(true); 70 latch.countDown(); 71 }); 72 doAnswer(blockingAnswer).when(mService).voidMethod(); 73 74 mService.voidMethod(); 75 76 // By unblocking we release the code triggered by blocking answer to run on a 77 // separated thread. 78 blockingAnswer.unblock(); 79 80 // Since code from BlockingAnswer is triggered in a separated thread, will use the 81 // countdown latch to sync up. 82 latch.await(1, TimeUnit.SECONDS); 83 assertThat(invoked.get()).isTrue(); 84 } 85 86 private interface SomeService { 87 voidMethod()88 void voidMethod(); 89 intMethod()90 int intMethod(); 91 } 92 } 93