1/*
2 * Copyright (C) 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.lifecycle;
18
19import static org.hamcrest.CoreMatchers.is;
20import static org.hamcrest.CoreMatchers.nullValue;
21import static org.hamcrest.MatcherAssert.assertThat;
22
23import org.junit.Test;
24import org.junit.runner.RunWith;
25import org.junit.runners.JUnit4;
26
27@RunWith(JUnit4.class)
28public class ViewModelStoreTest {
29
30    @Test
31    public void testClear() {
32        ViewModelStore store = new ViewModelStore();
33        TestViewModel viewModel1 = new TestViewModel();
34        TestViewModel viewModel2 = new TestViewModel();
35        store.put("a", viewModel1);
36        store.put("b", viewModel2);
37        assertThat(viewModel1.mCleared, is(false));
38        assertThat(viewModel2.mCleared, is(false));
39        store.clear();
40        assertThat(viewModel1.mCleared, is(true));
41        assertThat(viewModel2.mCleared, is(true));
42        assertThat(store.get("a"), nullValue());
43        assertThat(store.get("b"), nullValue());
44    }
45
46    static class TestViewModel extends ViewModel {
47        boolean mCleared = false;
48
49        @Override
50        protected void onCleared() {
51            mCleared = true;
52        }
53    }
54}
55