1 /* 2 * Copyright (C) 2022 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 com.android.server.art; 18 19 import static com.google.common.truth.Truth.assertThat; 20 21 import static org.mockito.Mockito.lenient; 22 23 import androidx.test.filters.SmallTest; 24 25 import com.android.server.art.testing.MockClock; 26 27 import org.junit.Before; 28 import org.junit.Test; 29 import org.junit.runner.RunWith; 30 import org.mockito.Mock; 31 import org.mockito.junit.MockitoJUnitRunner; 32 33 import java.util.ArrayList; 34 import java.util.List; 35 36 @SmallTest 37 @RunWith(MockitoJUnitRunner.StrictStubs.class) 38 public class DebouncerTest { 39 private MockClock mMockClock; 40 private Debouncer mDebouncer; 41 42 @Before setUp()43 public void setUp() throws Exception { 44 mMockClock = new MockClock(); 45 mDebouncer = 46 new Debouncer(100 /* intervalMs */, () -> mMockClock.createScheduledExecutor()); 47 } 48 49 @Test test()50 public void test() throws Exception { 51 List<Integer> list = new ArrayList<>(); 52 53 mDebouncer.maybeRunAsync(() -> list.add(1)); 54 mDebouncer.maybeRunAsync(() -> list.add(2)); 55 mMockClock.advanceTime(100); 56 mDebouncer.maybeRunAsync(() -> list.add(3)); 57 mMockClock.advanceTime(99); 58 mDebouncer.maybeRunAsync(() -> list.add(4)); 59 mMockClock.advanceTime(99); 60 mDebouncer.maybeRunAsync(() -> list.add(5)); 61 mMockClock.advanceTime(1000); 62 63 assertThat(list).containsExactly(2, 5).inOrder(); 64 65 // Verify that we don't create too many executors, and all the executors we create are 66 // eventually shut down. 67 List<MockClock.ScheduledExecutor> executors = mMockClock.getCreatedExecutors(); 68 assertThat(executors).hasSize(2); 69 for (MockClock.ScheduledExecutor executor : executors) { 70 assertThat(executor.isShutdown()).isTrue(); 71 } 72 } 73 } 74