1 /* 2 * Copyright (C) 2011 The Guava Authors 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except 5 * in compliance with the License. You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software distributed under the License 10 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express 11 * or implied. See the License for the specific language governing permissions and limitations under 12 * the License. 13 */ 14 15 package com.google.common.collect.testing.google; 16 17 import static com.google.common.collect.testing.features.CollectionFeature.KNOWN_ORDER; 18 import static com.google.common.collect.testing.features.CollectionFeature.SUPPORTS_REMOVE; 19 20 import com.google.common.annotations.GwtCompatible; 21 import com.google.common.collect.testing.IteratorFeature; 22 import com.google.common.collect.testing.IteratorTester; 23 import com.google.common.collect.testing.features.CollectionFeature; 24 25 import java.lang.reflect.Method; 26 import java.util.Arrays; 27 import java.util.Iterator; 28 import java.util.List; 29 30 /** 31 * Tester to make sure the {@code iterator().remove()} implementation of {@code Multiset} works when 32 * there are multiple occurrences of elements. 33 * 34 * @author Louis Wasserman 35 */ 36 @GwtCompatible 37 public class MultisetIteratorTester<E> extends AbstractMultisetTester<E> { 38 @SuppressWarnings("unchecked") 39 @CollectionFeature.Require({SUPPORTS_REMOVE, KNOWN_ORDER}) testRemovingIteratorKnownOrder()40 public void testRemovingIteratorKnownOrder() { 41 new IteratorTester<E>(4, IteratorFeature.MODIFIABLE, getSubjectGenerator().order( 42 Arrays.asList(samples.e0, samples.e1, samples.e1, samples.e2)), 43 IteratorTester.KnownOrder.KNOWN_ORDER) { 44 @Override 45 protected Iterator<E> newTargetIterator() { 46 return getSubjectGenerator().create(samples.e0, samples.e1, samples.e1, samples.e2) 47 .iterator(); 48 } 49 }.test(); 50 } 51 52 @SuppressWarnings("unchecked") 53 @CollectionFeature.Require(value = SUPPORTS_REMOVE, absent = KNOWN_ORDER) testRemovingIteratorUnknownOrder()54 public void testRemovingIteratorUnknownOrder() { 55 new IteratorTester<E>(4, IteratorFeature.MODIFIABLE, Arrays.asList(samples.e0, samples.e1, 56 samples.e1, samples.e2), IteratorTester.KnownOrder.UNKNOWN_ORDER) { 57 @Override 58 protected Iterator<E> newTargetIterator() { 59 return getSubjectGenerator().create(samples.e0, samples.e1, samples.e1, samples.e2) 60 .iterator(); 61 } 62 }.test(); 63 } 64 65 @SuppressWarnings("unchecked") 66 @CollectionFeature.Require(value = KNOWN_ORDER, absent = SUPPORTS_REMOVE) testIteratorKnownOrder()67 public void testIteratorKnownOrder() { 68 new IteratorTester<E>(4, IteratorFeature.UNMODIFIABLE, getSubjectGenerator().order( 69 Arrays.asList(samples.e0, samples.e1, samples.e1, samples.e2)), 70 IteratorTester.KnownOrder.KNOWN_ORDER) { 71 @Override 72 protected Iterator<E> newTargetIterator() { 73 return getSubjectGenerator().create(samples.e0, samples.e1, samples.e1, samples.e2) 74 .iterator(); 75 } 76 }.test(); 77 } 78 79 @SuppressWarnings("unchecked") 80 @CollectionFeature.Require(absent = {SUPPORTS_REMOVE, KNOWN_ORDER}) testIteratorUnknownOrder()81 public void testIteratorUnknownOrder() { 82 new IteratorTester<E>(4, IteratorFeature.UNMODIFIABLE, Arrays.asList(samples.e0, samples.e1, 83 samples.e1, samples.e2), IteratorTester.KnownOrder.UNKNOWN_ORDER) { 84 @Override 85 protected Iterator<E> newTargetIterator() { 86 return getSubjectGenerator().create(samples.e0, samples.e1, samples.e1, samples.e2) 87 .iterator(); 88 } 89 }.test(); 90 } 91 92 /** 93 * Returns {@link Method} instances for the tests that assume multisets support duplicates so that 94 * the test of {@code Multisets.forSet()} can suppress them. 95 */ getIteratorDuplicateInitializingMethods()96 public static List<Method> getIteratorDuplicateInitializingMethods() { 97 return Arrays.asList( 98 Platform.getMethod(MultisetIteratorTester.class, "testIteratorKnownOrder"), 99 Platform.getMethod(MultisetIteratorTester.class, "testIteratorUnknownOrder"), 100 Platform.getMethod(MultisetIteratorTester.class, "testRemovingIteratorKnownOrder"), 101 Platform.getMethod(MultisetIteratorTester.class, "testRemovingIteratorUnknownOrder")); 102 } 103 } 104