1 /* 2 * Copyright (C) 2007 The Guava Authors 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 package com.google.common.collect.testing.testers; 18 19 import static com.google.common.collect.testing.features.CollectionFeature.ALLOWS_NULL_VALUES; 20 import static com.google.common.collect.testing.features.CollectionFeature.SUPPORTS_ADD; 21 import static com.google.common.collect.testing.features.CollectionSize.ZERO; 22 23 import com.google.common.annotations.GwtCompatible; 24 import com.google.common.annotations.GwtIncompatible; 25 import com.google.common.collect.testing.Helpers; 26 import com.google.common.collect.testing.features.CollectionFeature; 27 import com.google.common.collect.testing.features.CollectionSize; 28 29 import java.lang.reflect.Method; 30 31 /** 32 * A generic JUnit test which tests add operations on a set. Can't be 33 * invoked directly; please see 34 * {@link com.google.common.collect.testing.SetTestSuiteBuilder}. 35 * 36 * @author Kevin Bourrillion 37 */ 38 @GwtCompatible(emulated = true) 39 public class SetAddTester<E> extends AbstractSetTester<E> { 40 @CollectionFeature.Require(SUPPORTS_ADD) 41 @CollectionSize.Require(absent = ZERO) 42 public void testAdd_supportedPresent() { 43 assertFalse("add(present) should return false", getSet().add(samples.e0)); 44 expectUnchanged(); 45 } 46 47 @CollectionFeature.Require(value = {SUPPORTS_ADD, ALLOWS_NULL_VALUES}) 48 @CollectionSize.Require(absent = ZERO) 49 public void testAdd_supportedNullPresent() { 50 E[] array = createArrayWithNullElement(); 51 collection = getSubjectGenerator().create(array); 52 assertFalse("add(nullPresent) should return false", getSet().add(null)); 53 expectContents(array); 54 } 55 56 /** 57 * Returns the {@link Method} instance for 58 * {@link #testAdd_supportedNullPresent()} so that tests can suppress it. See 59 * {@link CollectionAddTester#getAddNullSupportedMethod()} for details. 60 */ 61 @GwtIncompatible("reflection") 62 public static Method getAddSupportedNullPresentMethod() { 63 return Helpers.getMethod(SetAddTester.class, "testAdd_supportedNullPresent"); 64 } 65 } 66
