1 /* 2 * Copyright (C) 2021 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 17 /* 18 * @test 19 * @bug 7123229 20 * @summary (coll) EnumMap.containsValue(null) returns true 21 * @author ngmr 22 */ 23 package test.java.util.EnumMap; 24 25 import java.util.EnumMap; 26 import java.util.Map; 27 28 import org.testng.Assert; 29 import org.testng.annotations.Test; 30 31 public class UniqueNullValue { 32 static enum TestEnum { e00, e01 } 33 34 @Test testUniqueNull()35 public void testUniqueNull() { 36 Map<TestEnum, Integer> map = new EnumMap<>(TestEnum.class); 37 38 map.put(TestEnum.e00, 0); 39 Assert.assertTrue(map.containsValue(0)); 40 Assert.assertFalse(map.containsValue(null)); 41 42 map.put(TestEnum.e00, null); 43 Assert.assertFalse(map.containsValue(0)); 44 Assert.assertTrue(map.containsValue(null)); 45 } 46 }