ExploreByTouchHelperTest.java revision ff22d81f6561f6cdd2a91eb63238c41079927a22 
1/*
2 * Copyright (C) 2016 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 android.support.v4.widget;
18
19import android.graphics.Rect;
20import android.os.Build;
21import android.os.Bundle;
22import android.support.coreui.test.R;
23import android.support.test.annotation.UiThreadTest;
24import android.support.v4.BaseInstrumentationTestCase;
25import android.support.v4.view.ViewCompat;
26import android.support.v4.view.accessibility.AccessibilityNodeInfoCompat;
27import android.test.suitebuilder.annotation.SmallTest;
28import android.view.View;
29import org.junit.Before;
30import org.junit.Test;
31
32import java.util.List;
33
34import static junit.framework.Assert.assertFalse;
35import static org.junit.Assert.assertEquals;
36import static org.junit.Assert.assertNotNull;
37import static org.junit.Assume.assumeTrue;
38
39@SmallTest
40public class ExploreByTouchHelperTest extends BaseInstrumentationTestCase<ExploreByTouchHelperTestActivity> {
41    private View mHost;
42
43    public ExploreByTouchHelperTest() {
44        super(ExploreByTouchHelperTestActivity.class);
45    }
46
47    @Before
48    public void setUp() {
49        // Accessibility delegates are only supported on API 14+.
50        assumeTrue(Build.VERSION.SDK_INT >= 14);
51        mHost = mActivityTestRule.getActivity().findViewById(R.id.host_view);
52    }
53
54    @Test
55    @UiThreadTest
56    public void testBoundsInScreen() {
57        final ExploreByTouchHelper helper = new ParentBoundsHelper(mHost);
58        ViewCompat.setAccessibilityDelegate(mHost, helper);
59
60        final AccessibilityNodeInfoCompat node =
61                helper.getAccessibilityNodeProvider(mHost).createAccessibilityNodeInfo(1);
62        assertNotNull(node);
63
64        final Rect hostBounds = new Rect();
65        mHost.getLocalVisibleRect(hostBounds);
66        assertFalse("Host has not been laid out", hostBounds.isEmpty());
67
68        final Rect nodeBoundsInParent = new Rect();
69        node.getBoundsInParent(nodeBoundsInParent);
70        assertEquals("Wrong bounds in parent", hostBounds, nodeBoundsInParent);
71
72        final Rect hostBoundsOnScreen = getBoundsOnScreen(mHost);
73        final Rect nodeBoundsInScreen = new Rect();
74        node.getBoundsInScreen(nodeBoundsInScreen);
75        assertEquals("Wrong bounds in screen", hostBoundsOnScreen, nodeBoundsInScreen);
76
77        final int scrollX = 100;
78        final int scrollY = 50;
79        mHost.scrollTo(scrollX, scrollY);
80
81        // Generate a node for the new position.
82        final AccessibilityNodeInfoCompat scrolledNode =
83                helper.getAccessibilityNodeProvider(mHost).createAccessibilityNodeInfo(1);
84        assertNotNull(scrolledNode);
85
86        mHost.getLocalVisibleRect(hostBounds);
87        hostBounds.intersect(nodeBoundsInParent);
88        final Rect scrolledNodeBoundsInParent = new Rect();
89        scrolledNode.getBoundsInParent(scrolledNodeBoundsInParent);
90        assertEquals("Wrong bounds in parent after scrolling",
91                hostBounds, scrolledNodeBoundsInParent);
92
93        final Rect expectedBoundsInScreen = new Rect(hostBoundsOnScreen);
94        expectedBoundsInScreen.offset(-scrollX, -scrollY);
95        expectedBoundsInScreen.intersect(hostBoundsOnScreen);
96        scrolledNode.getBoundsInScreen(nodeBoundsInScreen);
97        assertEquals("Wrong bounds in screen after scrolling",
98                expectedBoundsInScreen, nodeBoundsInScreen);
99
100        ViewCompat.setAccessibilityDelegate(mHost, null);
101    }
102
103    private static Rect getBoundsOnScreen(View v) {
104        final int[] tempLocation = new int[2];
105        final Rect hostBoundsOnScreen = new Rect(0, 0, v.getWidth(), v.getHeight());
106        v.getLocationOnScreen(tempLocation);
107        hostBoundsOnScreen.offset(tempLocation[0], tempLocation[1]);
108        return hostBoundsOnScreen;
109    }
110
111    /**
112     * An extension of ExploreByTouchHelper that contains a single virtual view
113     * whose bounds match the host view.
114     */
115    private static class ParentBoundsHelper extends ExploreByTouchHelper {
116        private final View mHost;
117
118        public ParentBoundsHelper(View host) {
119            super(host);
120
121            mHost = host;
122        }
123
124        @Override
125        protected int getVirtualViewAt(float x, float y) {
126            return 1;
127        }
128
129        @Override
130        protected void getVisibleVirtualViews(List<Integer> virtualViewIds) {
131            virtualViewIds.add(1);
132        }
133
134        @Override
135        protected void onPopulateNodeForVirtualView(int virtualViewId, AccessibilityNodeInfoCompat node) {
136            if (virtualViewId == 1) {
137                node.setContentDescription("test");
138
139                final Rect hostBounds = new Rect(0, 0, mHost.getWidth(), mHost.getHeight());
140                node.setBoundsInParent(hostBounds);
141            }
142        }
143
144        @Override
145        protected boolean onPerformActionForVirtualView(int virtualViewId, int action, Bundle arguments) {
146            return false;
147        }
148    }
149}
150