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@SuppressWarnings("unchecked") // too many "unchecked generic array creations" 033@GwtCompatible 034@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests. 035public class QueueOfferTester<E> extends AbstractQueueTester<E> { 036 @CollectionFeature.Require(SUPPORTS_ADD) 037 public void testOffer_supportedNotPresent() { 038 assertTrue("offer(notPresent) should return true", getQueue().offer(e3())); 039 expectAdded(e3()); 040 } 041 042 @CollectionFeature.Require({SUPPORTS_ADD, ALLOWS_NULL_VALUES}) 043 public void testOffer_nullSupported() { 044 assertTrue("offer(null) should return true", getQueue().offer(null)); 045 expectAdded((E) null); 046 } 047 048 @CollectionFeature.Require(value = SUPPORTS_ADD, absent = ALLOWS_NULL_VALUES) 049 public void testOffer_nullUnsupported() { 050 try { 051 getQueue().offer(null); 052 fail("offer(null) should throw"); 053 } catch (NullPointerException expected) { 054 } 055 expectUnchanged(); 056 expectNullMissingWhenNullUnsupported("Should not contain null after unsupported offer(null)"); 057 } 058}