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;
024import static com.google.common.collect.testing.testers.ReflectionFreeAssertThrows.assertThrows;
025
026import com.google.common.annotations.GwtCompatible;
027import com.google.common.collect.testing.features.CollectionFeature;
028import com.google.common.collect.testing.features.CollectionSize;
029import java.util.NoSuchElementException;
030import org.junit.Ignore;
031
032/**
033 * A generic JUnit test which tests {@code remove()} operations on a queue. Can't be invoked
034 * directly; please see {@link com.google.common.collect.testing.CollectionTestSuiteBuilder}.
035 *
036 * @author Jared Levy
037 */
038@GwtCompatible
039@Ignore("test runners must not instantiate and run this directly, only via suites we build")
040// @Ignore affects the Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
041@SuppressWarnings("JUnit4ClassUsedInJUnit3")
042public class QueueRemoveTester<E> extends AbstractQueueTester<E> {
043  @CollectionFeature.Require(SUPPORTS_REMOVE)
044  @CollectionSize.Require(ZERO)
045  public void testRemove_empty() {
046    assertThrows(NoSuchElementException.class, () -> getQueue().remove());
047    expectUnchanged();
048  }
049
050  @CollectionFeature.Require(SUPPORTS_REMOVE)
051  @CollectionSize.Require(ONE)
052  public void testRemove_size1() {
053    assertEquals("size1Queue.remove() should return first element", e0(), getQueue().remove());
054    expectMissing(e0());
055  }
056
057  @CollectionFeature.Require({KNOWN_ORDER, SUPPORTS_REMOVE})
058  @CollectionSize.Require(SEVERAL)
059  public void testRemove_sizeMany() {
060    assertEquals("sizeManyQueue.remove() should return first element", e0(), getQueue().remove());
061    expectMissing(e0());
062  }
063}