| /* |
| * Copyright (C) 2015 The Guava Authors |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.google.common.collect.testing.testers; |
| |
| import static com.google.common.collect.testing.features.CollectionFeature.FAILS_FAST_ON_CONCURRENT_MODIFICATION; |
| import static com.google.common.collect.testing.features.CollectionFeature.SUPPORTS_ITERATOR_REMOVE; |
| import static com.google.common.collect.testing.features.CollectionFeature.SUPPORTS_REMOVE; |
| import static com.google.common.collect.testing.features.CollectionSize.SEVERAL; |
| import static com.google.common.collect.testing.features.CollectionSize.ZERO; |
| |
| import com.google.common.annotations.GwtCompatible; |
| import com.google.common.collect.testing.AbstractCollectionTester; |
| import com.google.common.collect.testing.features.CollectionFeature; |
| import com.google.common.collect.testing.features.CollectionSize; |
| import java.util.Collection; |
| import java.util.ConcurrentModificationException; |
| import java.util.Iterator; |
| import java.util.function.Predicate; |
| import org.junit.Ignore; |
| |
| /** |
| * A generic JUnit test which tests {@link Collection#removeIf}. Can't be invoked directly; please |
| * see {@link com.google.common.collect.testing.CollectionTestSuiteBuilder}. |
| * |
| * @author Louis Wasserman |
| */ |
| @GwtCompatible |
| @SuppressWarnings("unchecked") // too many "unchecked generic array creations" |
| @Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests. |
| public class CollectionRemoveIfTester<E> extends AbstractCollectionTester<E> { |
| @CollectionFeature.Require(SUPPORTS_ITERATOR_REMOVE) |
| public void testRemoveIf_alwaysFalse() { |
| assertFalse("removeIf(x -> false) should return false", collection.removeIf(x -> false)); |
| expectUnchanged(); |
| } |
| |
| @CollectionFeature.Require(SUPPORTS_ITERATOR_REMOVE) |
| @CollectionSize.Require(absent = ZERO) |
| public void testRemoveIf_sometimesTrue() { |
| assertTrue( |
| "removeIf(isEqual(present)) should return true", |
| collection.removeIf(Predicate.isEqual(samples.e0()))); |
| expectMissing(samples.e0()); |
| } |
| |
| @CollectionFeature.Require(SUPPORTS_ITERATOR_REMOVE) |
| @CollectionSize.Require(absent = ZERO) |
| public void testRemoveIf_allPresent() { |
| assertTrue("removeIf(x -> true) should return true", collection.removeIf(x -> true)); |
| expectContents(); |
| } |
| |
| @CollectionFeature.Require({SUPPORTS_ITERATOR_REMOVE, FAILS_FAST_ON_CONCURRENT_MODIFICATION}) |
| @CollectionSize.Require(SEVERAL) |
| public void testRemoveIfSomeMatchesConcurrentWithIteration() { |
| try { |
| Iterator<E> iterator = collection.iterator(); |
| assertTrue(collection.removeIf(Predicate.isEqual(samples.e0()))); |
| iterator.next(); |
| fail("Expected ConcurrentModificationException"); |
| } catch (ConcurrentModificationException expected) { |
| // success |
| } |
| } |
| |
| @CollectionFeature.Require(absent = SUPPORTS_REMOVE) |
| @CollectionSize.Require(ZERO) |
| public void testRemoveIf_unsupportedEmptyCollection() { |
| try { |
| assertFalse( |
| "removeIf(Predicate) should return false or throw " + "UnsupportedOperationException", |
| collection.removeIf( |
| x -> { |
| throw new AssertionError("predicate should never be called"); |
| })); |
| } catch (UnsupportedOperationException tolerated) { |
| } |
| expectUnchanged(); |
| } |
| |
| @CollectionFeature.Require(absent = SUPPORTS_REMOVE) |
| @CollectionSize.Require(absent = ZERO) |
| public void testRemoveIf_alwaysTrueUnsupported() { |
| try { |
| collection.removeIf(x -> true); |
| fail("removeIf(x -> true) should throw " + "UnsupportedOperationException"); |
| } catch (UnsupportedOperationException expected) { |
| } |
| expectUnchanged(); |
| assertTrue(collection.contains(samples.e0())); |
| } |
| } |