001/* 002 * Copyright (C) 2008 The Guava Authors 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package com.google.common.collect.testing.testers; 018 019import static com.google.common.collect.testing.features.CollectionFeature.ALLOWS_NULL_VALUES; 020import static com.google.common.collect.testing.features.CollectionFeature.SUPPORTS_ADD; 021 022import com.google.common.annotations.GwtCompatible; 023import com.google.common.collect.testing.features.CollectionFeature; 024import org.junit.Ignore; 025 026/** 027 * A generic JUnit test which tests offer operations on a queue. Can't be invoked directly; please 028 * see {@link com.google.common.collect.testing.CollectionTestSuiteBuilder}. 029 * 030 * @author Jared Levy 031 */ 032@GwtCompatible 033@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests. 034public class QueueOfferTester<E> extends AbstractQueueTester<E> { 035 @CollectionFeature.Require(SUPPORTS_ADD) 036 public void testOffer_supportedNotPresent() { 037 assertTrue("offer(notPresent) should return true", getQueue().offer(e3())); 038 expectAdded(e3()); 039 } 040 041 @CollectionFeature.Require({SUPPORTS_ADD, ALLOWS_NULL_VALUES}) 042 public void testOffer_nullSupported() { 043 assertTrue("offer(null) should return true", getQueue().offer(null)); 044 expectAdded((E) null); 045 } 046 047 @CollectionFeature.Require(value = SUPPORTS_ADD, absent = ALLOWS_NULL_VALUES) 048 public void testOffer_nullUnsupported() { 049 try { 050 getQueue().offer(null); 051 fail("offer(null) should throw"); 052 } catch (NullPointerException expected) { 053 } 054 expectUnchanged(); 055 expectNullMissingWhenNullUnsupported("Should not contain null after unsupported offer(null)"); 056 } 057}