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.KNOWN_ORDER; 020import static com.google.common.collect.testing.features.CollectionFeature.SUPPORTS_REMOVE; 021import static com.google.common.collect.testing.features.CollectionSize.ONE; 022import static com.google.common.collect.testing.features.CollectionSize.SEVERAL; 023import static com.google.common.collect.testing.features.CollectionSize.ZERO; 024 025import com.google.common.annotations.GwtCompatible; 026import com.google.common.collect.testing.features.CollectionFeature; 027import com.google.common.collect.testing.features.CollectionSize; 028import org.junit.Ignore; 029 030/** 031 * A generic JUnit test which tests {@code poll()} operations on a queue. Can't be invoked directly; 032 * please see {@link com.google.common.collect.testing.CollectionTestSuiteBuilder}. 033 * 034 * @author Jared Levy 035 */ 036@SuppressWarnings("unchecked") // too many "unchecked generic array creations" 037@GwtCompatible 038@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests. 039public class QueuePollTester<E> extends AbstractQueueTester<E> { 040 @CollectionFeature.Require(SUPPORTS_REMOVE) 041 @CollectionSize.Require(ZERO) 042 public void testPoll_empty() { 043 assertNull("emptyQueue.poll() should return null", getQueue().poll()); 044 expectUnchanged(); 045 } 046 047 @CollectionFeature.Require(SUPPORTS_REMOVE) 048 @CollectionSize.Require(ONE) 049 public void testPoll_size1() { 050 assertEquals("size1Queue.poll() should return first element", e0(), getQueue().poll()); 051 expectMissing(e0()); 052 } 053 054 @CollectionFeature.Require({KNOWN_ORDER, SUPPORTS_REMOVE}) 055 @CollectionSize.Require(SEVERAL) 056 public void testPoll_sizeMany() { 057 assertEquals("sizeManyQueue.poll() should return first element", e0(), getQueue().poll()); 058 expectMissing(e0()); 059 } 060}