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 libcore.java.util; 18 19import junit.framework.TestCase; 20 21import java.util.ConcurrentModificationException; 22import java.util.WeakHashMap; 23 24public class WeakHashMapTest extends TestCase { 25 26 static Data[] data = new Data[100]; 27 28 public void test_replaceAll() { 29 initializeData(); 30 WeakHashMap<Data, String> map = new WeakHashMap<>(); 31 for(int i = 0; i < data.length; i++) { 32 map.put(data[i], ""); 33 } 34 map.replaceAll((k, v) -> k.value); 35 36 for(int i = 0; i < data.length; i++) { 37 assertEquals(data[i].value, map.get(data[i])); 38 } 39 40 try { 41 map.replaceAll(new java.util.function.BiFunction<Data, String, String>() { 42 @Override 43 public String apply(Data k, String v) { 44 map.put(new Data(), ""); 45 return v; 46 } 47 }); 48 fail(); 49 } catch (ConcurrentModificationException expected) { 50 } 51 52 try { 53 map.replaceAll(null); 54 fail(); 55 } catch (NullPointerException expected) { 56 } 57 58 map.clear(); 59 for(int i = 0; i < data.length; i++) { 60 map.put(data[i], data[i].value); 61 } 62 63 map.replaceAll((k, v) -> null); 64 65 for(int i = 0; i < data.length; i++) { 66 assertNull(map.get(data[i])); 67 } 68 assertEquals(data.length, map.size()); 69 } 70 71 private void initializeData() { 72 for (int i = 0; i < data.length; i++) { 73 data[i] = new Data(); 74 data[i].value = Integer.toString(i); 75 } 76 } 77 78 private static class Data { 79 public String value = ""; 80 } 81} 82