1/*
2 * Copyright (C) 2007 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.view;
18
19import com.android.frameworks.coretests.R;
20import android.view.ViewGroupChildren;
21
22import android.test.ActivityInstrumentationTestCase;
23import android.test.suitebuilder.annotation.MediumTest;
24import android.test.ViewAsserts;
25import android.test.UiThreadTest;
26import android.view.View;
27import android.view.ViewGroup;
28import android.widget.LinearLayout;
29import android.widget.TextView;
30
31/**
32 * Exercises {@link android.view.ViewGroup}'s ability to add/remove children.
33 */
34public class ViewGroupChildrenTest extends ActivityInstrumentationTestCase<ViewGroupChildren> {
35    private ViewGroup mGroup;
36
37    public ViewGroupChildrenTest() {
38        super("com.android.frameworks.coretests", ViewGroupChildren.class);
39    }
40
41    @Override
42    public void setUp() throws Exception {
43        super.setUp();
44
45        final ViewGroupChildren a = getActivity();
46        mGroup = (ViewGroup) a.findViewById(R.id.group);
47    }
48
49    @MediumTest
50    public void testSetUpConditions() throws Exception {
51        assertNotNull(mGroup);
52    }
53
54    @MediumTest
55    public void testStartsEmpty() throws Exception {
56        assertEquals("A ViewGroup should have no child by default", 0, mGroup.getChildCount());
57    }
58
59    @UiThreadTest
60    @MediumTest
61    public void testAddChild() throws Exception {
62        View view = createView("1");
63        mGroup.addView(view);
64
65        assertEquals(1, mGroup.getChildCount());
66        ViewAsserts.assertGroupIntegrity(mGroup);
67        ViewAsserts.assertGroupContains(mGroup, view);
68    }
69
70    @UiThreadTest
71    @MediumTest
72    public void testAddChildAtFront() throws Exception {
73        // 24 should be greater than ViewGroup.ARRAY_CAPACITY_INCREMENT
74        for (int i = 0; i < 24; i++) {
75            View view = createView(String.valueOf(i + 1));
76            mGroup.addView(view);
77        }
78
79        View view = createView("X");
80        mGroup.addView(view, 0);
81
82        assertEquals(25, mGroup.getChildCount());
83        ViewAsserts.assertGroupIntegrity(mGroup);
84        ViewAsserts.assertGroupContains(mGroup, view);
85        assertSame(view, mGroup.getChildAt(0));
86    }
87
88    @UiThreadTest
89    @MediumTest
90    public void testAddChildInMiddle() throws Exception {
91        // 24 should be greater than ViewGroup.ARRAY_CAPACITY_INCREMENT
92        for (int i = 0; i < 24; i++) {
93            View view = createView(String.valueOf(i + 1));
94            mGroup.addView(view);
95        }
96
97        View view = createView("X");
98        mGroup.addView(view, 12);
99
100        assertEquals(25, mGroup.getChildCount());
101        ViewAsserts.assertGroupIntegrity(mGroup);
102        ViewAsserts.assertGroupContains(mGroup, view);
103        assertSame(view, mGroup.getChildAt(12));
104    }
105
106    @UiThreadTest
107    @MediumTest
108    public void testAddChildren() throws Exception {
109        // 24 should be greater than ViewGroup.ARRAY_CAPACITY_INCREMENT
110        for (int i = 0; i < 24; i++) {
111            View view = createView(String.valueOf(i + 1));
112            mGroup.addView(view);
113
114            ViewAsserts.assertGroupContains(mGroup, view);
115        }
116        assertEquals(24, mGroup.getChildCount());
117    }
118
119    @UiThreadTest
120    @MediumTest
121    public void testRemoveChild() throws Exception {
122        View view = createView("1");
123        mGroup.addView(view);
124
125        ViewAsserts.assertGroupIntegrity(mGroup);
126
127        mGroup.removeView(view);
128
129        ViewAsserts.assertGroupIntegrity(mGroup);
130        ViewAsserts.assertGroupNotContains(mGroup, view);
131
132        assertEquals(0, mGroup.getChildCount());
133        assertNull(view.getParent());
134    }
135
136    @UiThreadTest
137    @MediumTest
138    public void testRemoveChildren() throws Exception {
139        // 24 should be greater than ViewGroup.ARRAY_CAPACITY_INCREMENT
140        final View[] views = new View[24];
141
142        for (int i = 0; i < views.length; i++) {
143            views[i] = createView(String.valueOf(i + 1));
144            mGroup.addView(views[i]);
145        }
146
147        for (int i = views.length - 1; i >= 0; i--) {
148            mGroup.removeViewAt(i);
149            ViewAsserts.assertGroupIntegrity(mGroup);
150            ViewAsserts.assertGroupNotContains(mGroup, views[i]);
151            assertNull(views[i].getParent());
152        }
153
154        assertEquals(0, mGroup.getChildCount());
155    }
156
157    @UiThreadTest
158    @MediumTest
159    public void testRemoveChildrenBulk() throws Exception {
160        // 24 should be greater than ViewGroup.ARRAY_CAPACITY_INCREMENT
161        final View[] views = new View[24];
162
163        for (int i = 0; i < views.length; i++) {
164            views[i] = createView(String.valueOf(i + 1));
165            mGroup.addView(views[i]);
166        }
167
168        mGroup.removeViews(6, 7);
169        ViewAsserts.assertGroupIntegrity(mGroup);
170        for (int i = 6; i < 13; i++) {
171            ViewAsserts.assertGroupNotContains(mGroup, views[i]);
172            assertNull(views[i].getParent());
173        }
174
175        assertEquals(17, mGroup.getChildCount());
176    }
177
178    @UiThreadTest
179    @MediumTest
180    public void testRemoveChildrenBulkAtFront() throws Exception {
181        // 24 should be greater than ViewGroup.ARRAY_CAPACITY_INCREMENT
182        final View[] views = new View[24];
183
184        for (int i = 0; i < views.length; i++) {
185            views[i] = createView(String.valueOf(i + 1));
186            mGroup.addView(views[i]);
187        }
188
189        mGroup.removeViews(0, 7);
190        ViewAsserts.assertGroupIntegrity(mGroup);
191        for (int i = 0; i < 7; i++) {
192            ViewAsserts.assertGroupNotContains(mGroup, views[i]);
193            assertNull(views[i].getParent());
194        }
195
196        assertEquals("8", ((TextView) mGroup.getChildAt(0)).getText());
197        assertEquals(17, mGroup.getChildCount());
198    }
199
200    @UiThreadTest
201    @MediumTest
202    public void testRemoveChildrenBulkAtEnd() throws Exception {
203        // 24 should be greater than ViewGroup.ARRAY_CAPACITY_INCREMENT
204        final View[] views = new View[24];
205
206        for (int i = 0; i < views.length; i++) {
207            views[i] = createView(String.valueOf(i + 1));
208            mGroup.addView(views[i]);
209        }
210
211        mGroup.removeViews(17, 7);
212        ViewAsserts.assertGroupIntegrity(mGroup);
213        for (int i = 17; i < 24; i++) {
214            ViewAsserts.assertGroupNotContains(mGroup, views[i]);
215            assertNull(views[i].getParent());
216        }
217        assertEquals("17", ((TextView) mGroup.getChildAt(mGroup.getChildCount() - 1)).getText());
218        assertEquals(17, mGroup.getChildCount());
219    }
220
221    @UiThreadTest
222    @MediumTest
223    public void testRemoveChildAtFront() throws Exception {
224        // 24 should be greater than ViewGroup.ARRAY_CAPACITY_INCREMENT
225        final View[] views = new View[24];
226
227        for (int i = 0; i < views.length; i++) {
228            views[i] = createView(String.valueOf(i + 1));
229            mGroup.addView(views[i]);
230        }
231
232        mGroup.removeViewAt(0);
233        ViewAsserts.assertGroupIntegrity(mGroup);
234        ViewAsserts.assertGroupNotContains(mGroup, views[0]);
235        assertNull(views[0].getParent());
236
237        assertEquals(views.length - 1, mGroup.getChildCount());
238    }
239
240    @UiThreadTest
241    @MediumTest
242    public void testRemoveChildInMiddle() throws Exception {
243        // 24 should be greater than ViewGroup.ARRAY_CAPACITY_INCREMENT
244        final View[] views = new View[24];
245
246        for (int i = 0; i < views.length; i++) {
247            views[i] = createView(String.valueOf(i + 1));
248            mGroup.addView(views[i]);
249        }
250
251        mGroup.removeViewAt(12);
252        ViewAsserts.assertGroupIntegrity(mGroup);
253        ViewAsserts.assertGroupNotContains(mGroup, views[12]);
254        assertNull(views[12].getParent());
255
256        assertEquals(views.length - 1, mGroup.getChildCount());
257    }
258
259    private TextView createView(String text) {
260        TextView view = new TextView(getActivity());
261        view.setText(text);
262        view.setLayoutParams(new LinearLayout.LayoutParams(
263                LinearLayout.LayoutParams.MATCH_PARENT,
264                LinearLayout.LayoutParams.WRAP_CONTENT
265        ));
266        return view;
267    }
268}
269