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.CollectionSize.ONE; 021import static com.google.common.collect.testing.features.CollectionSize.SEVERAL; 022import static com.google.common.collect.testing.features.CollectionSize.ZERO; 023 024import com.google.common.annotations.GwtCompatible; 025import com.google.common.collect.testing.features.CollectionFeature; 026import com.google.common.collect.testing.features.CollectionSize; 027import java.util.NoSuchElementException; 028import org.junit.Ignore; 029 030/** 031 * A generic JUnit test which tests {@code element()} operations on a queue. Can't be invoked 032 * directly; please see {@link com.google.common.collect.testing.CollectionTestSuiteBuilder}. 033 * 034 * @author Jared Levy 035 */ 036@GwtCompatible 037@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests. 038public class QueueElementTester<E> extends AbstractQueueTester<E> { 039 @CollectionSize.Require(ZERO) 040 public void testElement_empty() { 041 try { 042 getQueue().element(); 043 fail("emptyQueue.element() should throw"); 044 } catch (NoSuchElementException expected) { 045 } 046 expectUnchanged(); 047 } 048 049 @CollectionSize.Require(ONE) 050 public void testElement_size1() { 051 assertEquals("size1Queue.element() should return first element", e0(), getQueue().element()); 052 expectUnchanged(); 053 } 054 055 @CollectionFeature.Require(KNOWN_ORDER) 056 @CollectionSize.Require(SEVERAL) 057 public void testElement_sizeMany() { 058 assertEquals("sizeManyQueue.element() should return first element", e0(), getQueue().element()); 059 expectUnchanged(); 060 } 061}