1/* 2 * Copyright 2017 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 17package androidx.recyclerview.selection; 18 19import static org.junit.Assert.assertEquals; 20import static org.junit.Assert.assertFalse; 21import static org.junit.Assert.assertTrue; 22 23import android.support.test.filters.SmallTest; 24import android.support.test.runner.AndroidJUnit4; 25 26import org.junit.Before; 27import org.junit.Test; 28import org.junit.runner.RunWith; 29 30@RunWith(AndroidJUnit4.class) 31@SmallTest 32public class OperationMonitorTest { 33 34 private OperationMonitor mMonitor; 35 private TestListener mListener; 36 37 @Before 38 public void setUp() { 39 mMonitor = new OperationMonitor(); 40 mListener = new TestListener(mMonitor); 41 } 42 43 @Test 44 public void testNotStarted() { 45 assertFalse(mMonitor.isStarted()); 46 } 47 48 @Test 49 public void testStarted() { 50 mMonitor.start(); 51 assertTrue(mMonitor.isStarted()); 52 } 53 54 @Test 55 public void testStopped() { 56 mMonitor.start(); 57 mMonitor.stop(); 58 assertFalse(mMonitor.isStarted()); 59 } 60 61 @Test 62 public void testStartedCallsListener() { 63 mMonitor.addListener(mListener); 64 mMonitor.start(); 65 mListener.assertLastState(true); 66 mMonitor.stop(); 67 mListener.assertLastState(false); 68 } 69 70 @Test 71 public void testRemoveListener() { 72 mMonitor.addListener(mListener); 73 mMonitor.removeListener(mListener); 74 mMonitor.start(); 75 mListener.assertLastState(false); 76 } 77 78 private static final class TestListener implements OperationMonitor.OnChangeListener { 79 80 private boolean mLastState; 81 private OperationMonitor mMonitor; 82 83 TestListener(OperationMonitor monitor) { 84 mMonitor = monitor; 85 } 86 87 @Override 88 public void onChanged() { 89 mLastState = mMonitor.isStarted(); 90 } 91 92 void assertLastState(boolean expected) { 93 assertEquals(expected, mLastState); 94 } 95 } 96} 97