| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License |
| */ |
| |
| package com.android.systemui.util.leak; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertNotSame; |
| import static org.junit.Assert.assertTrue; |
| |
| import android.support.test.filters.SmallTest; |
| import android.support.test.runner.AndroidJUnit4; |
| |
| import com.android.systemui.util.leak.ReferenceTestUtils.CollectionWaiter; |
| |
| import org.junit.Before; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| |
| @SmallTest |
| @RunWith(AndroidJUnit4.class) |
| public class WeakIdentityHashMapTest { |
| |
| WeakIdentityHashMap<Object, Object> mMap; |
| |
| @Before |
| public void setup() { |
| mMap = new WeakIdentityHashMap<>(); |
| } |
| |
| @Test |
| public void testUsesIdentity() { |
| String a1 = new String("a"); |
| String a2 = new String("a"); |
| assertNotSame(a1, a2); |
| |
| mMap.put(a1, "value1"); |
| mMap.put(a2, "value2"); |
| |
| assertEquals("value1", mMap.get(a1)); |
| assertEquals("value2", mMap.get(a2)); |
| } |
| |
| @Test |
| public void testWeaklyReferences() { |
| Object object = new Object(); |
| CollectionWaiter collectionWaiter = ReferenceTestUtils.createCollectionWaiter(object); |
| |
| mMap.put(object, "value"); |
| object = null; |
| |
| // Wait until object has been collected. We'll also need to wait for mMap to become empty, |
| // because our collection waiter may be told about the collection earlier than mMap. |
| collectionWaiter.waitForCollection(); |
| ReferenceTestUtils.waitForCondition(mMap::isEmpty); |
| |
| assertEquals(0, mMap.size()); |
| assertTrue(mMap.isEmpty()); |
| } |
| } |