1 /* 2 * Copyright (C) 2008 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.KNOWN_ORDER; 20 import static com.google.common.collect.testing.features.CollectionSize.ONE; 21 import static com.google.common.collect.testing.features.CollectionSize.SEVERAL; 22 import static com.google.common.collect.testing.features.CollectionSize.ZERO; 23 24 import com.google.common.annotations.GwtCompatible; 25 import com.google.common.collect.testing.features.CollectionFeature; 26 import com.google.common.collect.testing.features.CollectionSize; 27 import org.junit.Ignore; 28 29 /** 30 * A generic JUnit test which tests {@code peek()} operations on a queue. Can't be invoked directly; 31 * please see {@link com.google.common.collect.testing.CollectionTestSuiteBuilder}. 32 * 33 * @author Jared Levy 34 */ 35 @GwtCompatible 36 @Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests. 37 public class QueuePeekTester<E> extends AbstractQueueTester<E> { 38 @CollectionSize.Require(ZERO) testPeek_empty()39 public void testPeek_empty() { 40 assertNull("emptyQueue.peek() should return null", getQueue().peek()); 41 expectUnchanged(); 42 } 43 44 @CollectionSize.Require(ONE) testPeek_size1()45 public void testPeek_size1() { 46 assertEquals("size1Queue.peek() should return first element", e0(), getQueue().peek()); 47 expectUnchanged(); 48 } 49 50 @CollectionFeature.Require(KNOWN_ORDER) 51 @CollectionSize.Require(SEVERAL) testPeek_sizeMany()52 public void testPeek_sizeMany() { 53 assertEquals("sizeManyQueue.peek() should return first element", e0(), getQueue().peek()); 54 expectUnchanged(); 55 } 56 } 57