1/* 2 * Copyright 2018 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 */ 16package androidx.core.view; 17 18import static org.hamcrest.CoreMatchers.equalTo; 19import static org.junit.Assert.assertEquals; 20import static org.junit.Assert.assertNotNull; 21import static org.junit.Assert.assertNull; 22import static org.junit.Assert.assertSame; 23import static org.junit.Assert.assertThat; 24import static org.junit.Assert.assertTrue; 25 26import android.app.Activity; 27import android.support.test.filters.SmallTest; 28import android.support.test.runner.AndroidJUnit4; 29import android.support.v4.BaseInstrumentationTestCase; 30import android.view.Display; 31import android.view.View; 32 33import androidx.core.test.R; 34 35import org.junit.Before; 36import org.junit.Test; 37import org.junit.runner.RunWith; 38 39import java.util.HashSet; 40import java.util.Set; 41 42@RunWith(AndroidJUnit4.class) 43@SmallTest 44public class ViewCompatTest extends BaseInstrumentationTestCase<ViewCompatActivity> { 45 46 private View mView; 47 48 public ViewCompatTest() { 49 super(ViewCompatActivity.class); 50 } 51 52 @Before 53 public void setUp() { 54 final Activity activity = mActivityTestRule.getActivity(); 55 mView = activity.findViewById(R.id.view); 56 } 57 58 @Test 59 public void testConstants() { 60 // Compat constants must match core constants since they can be used interchangeably 61 // in various support lib calls. 62 assertEquals("LTR constants", View.LAYOUT_DIRECTION_LTR, ViewCompat.LAYOUT_DIRECTION_LTR); 63 assertEquals("RTL constants", View.LAYOUT_DIRECTION_RTL, ViewCompat.LAYOUT_DIRECTION_RTL); 64 } 65 66 @Test 67 public void testGetDisplay() { 68 final Display display = ViewCompat.getDisplay(mView); 69 assertNotNull(display); 70 } 71 72 @Test 73 public void testGetDisplay_returnsNullForUnattachedView() { 74 final View view = new View(mActivityTestRule.getActivity()); 75 final Display display = ViewCompat.getDisplay(view); 76 assertNull(display); 77 } 78 79 @Test 80 public void testTransitionName() { 81 final View view = new View(mActivityTestRule.getActivity()); 82 ViewCompat.setTransitionName(view, "abc"); 83 assertEquals("abc", ViewCompat.getTransitionName(view)); 84 } 85 86 @Test 87 public void testGenerateViewId() { 88 final int requestCount = 100; 89 90 Set<Integer> generatedIds = new HashSet<>(); 91 for (int i = 0; i < requestCount; i++) { 92 int generatedId = ViewCompat.generateViewId(); 93 assertTrue(isViewIdGenerated(generatedId)); 94 generatedIds.add(generatedId); 95 } 96 97 assertThat(generatedIds.size(), equalTo(requestCount)); 98 } 99 100 @Test 101 public void testRequireViewByIdFound() { 102 View container = mActivityTestRule.getActivity().findViewById(R.id.container); 103 assertSame(mView, ViewCompat.requireViewById(container, R.id.view)); 104 } 105 106 @Test(expected = IllegalArgumentException.class) 107 public void testRequireViewByIdMissing() { 108 View container = mActivityTestRule.getActivity().findViewById(R.id.container); 109 110 // action_bar isn't present inside container 111 ViewCompat.requireViewById(container, R.id.action_bar); 112 } 113 114 @Test(expected = IllegalArgumentException.class) 115 public void testRequireViewByIdInvalid() { 116 View container = mActivityTestRule.getActivity().findViewById(R.id.container); 117 118 // NO_ID is always invalid 119 ViewCompat.requireViewById(container, View.NO_ID); 120 } 121 122 private static boolean isViewIdGenerated(int id) { 123 return (id & 0xFF000000) == 0 && (id & 0x00FFFFFF) != 0; 124 } 125} 126