| /* |
| * Copyright (C) 2008 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.ALLOWS_NULL_QUERIES; |
| import static com.google.common.collect.testing.features.CollectionFeature.ALLOWS_NULL_VALUES; |
| import static com.google.common.collect.testing.features.CollectionFeature.FAILS_FAST_ON_CONCURRENT_MODIFICATION; |
| 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.WrongType; |
| import com.google.common.collect.testing.features.CollectionFeature; |
| import com.google.common.collect.testing.features.CollectionSize; |
| import java.util.ConcurrentModificationException; |
| import java.util.Iterator; |
| import org.junit.Ignore; |
| |
| /** |
| * A generic JUnit test which tests {@code remove} operations on a collection. Can't be invoked |
| * directly; please see {@link com.google.common.collect.testing.CollectionTestSuiteBuilder}. |
| * |
| * @author George van den Driessche |
| */ |
| @SuppressWarnings("unchecked") // too many "unchecked generic array creations" |
| @GwtCompatible |
| @Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests. |
| public class CollectionRemoveTester<E> extends AbstractCollectionTester<E> { |
| @CollectionFeature.Require(SUPPORTS_REMOVE) |
| @CollectionSize.Require(absent = ZERO) |
| public void testRemove_present() { |
| int initialSize = collection.size(); |
| assertTrue("remove(present) should return true", collection.remove(e0())); |
| assertEquals( |
| "remove(present) should decrease a collection's size by one.", |
| initialSize - 1, |
| collection.size()); |
| expectMissing(e0()); |
| } |
| |
| @CollectionFeature.Require({SUPPORTS_REMOVE, FAILS_FAST_ON_CONCURRENT_MODIFICATION}) |
| @CollectionSize.Require(SEVERAL) |
| public void testRemovePresentConcurrentWithIteration() { |
| try { |
| Iterator<E> iterator = collection.iterator(); |
| assertTrue(collection.remove(e0())); |
| iterator.next(); |
| fail("Expected ConcurrentModificationException"); |
| } catch (ConcurrentModificationException expected) { |
| // success |
| } |
| } |
| |
| @CollectionFeature.Require(SUPPORTS_REMOVE) |
| public void testRemove_notPresent() { |
| assertFalse("remove(notPresent) should return false", collection.remove(e3())); |
| expectUnchanged(); |
| } |
| |
| @CollectionFeature.Require({SUPPORTS_REMOVE, ALLOWS_NULL_VALUES}) |
| @CollectionSize.Require(absent = ZERO) |
| public void testRemove_nullPresent() { |
| collection = getSubjectGenerator().create(createArrayWithNullElement()); |
| |
| int initialSize = collection.size(); |
| assertTrue("remove(null) should return true", collection.remove(null)); |
| assertEquals( |
| "remove(present) should decrease a collection's size by one.", |
| initialSize - 1, |
| collection.size()); |
| expectMissing((E) null); |
| } |
| |
| @CollectionFeature.Require(absent = SUPPORTS_REMOVE) |
| @CollectionSize.Require(absent = ZERO) |
| public void testRemove_unsupported() { |
| try { |
| collection.remove(e0()); |
| fail("remove(present) should throw UnsupportedOperationException"); |
| } catch (UnsupportedOperationException expected) { |
| } |
| expectUnchanged(); |
| assertTrue("remove(present) should not remove the element", collection.contains(e0())); |
| } |
| |
| @CollectionFeature.Require(absent = SUPPORTS_REMOVE) |
| public void testRemove_unsupportedNotPresent() { |
| try { |
| assertFalse( |
| "remove(notPresent) should return false or throw UnsupportedOperationException", |
| collection.remove(e3())); |
| } catch (UnsupportedOperationException tolerated) { |
| } |
| expectUnchanged(); |
| expectMissing(e3()); |
| } |
| |
| @CollectionFeature.Require(value = SUPPORTS_REMOVE, absent = ALLOWS_NULL_QUERIES) |
| public void testRemove_nullNotSupported() { |
| try { |
| assertFalse( |
| "remove(null) should return false or throw NullPointerException", |
| collection.remove(null)); |
| } catch (NullPointerException tolerated) { |
| } |
| expectUnchanged(); |
| } |
| |
| @CollectionFeature.Require({SUPPORTS_REMOVE, ALLOWS_NULL_QUERIES}) |
| public void testRemove_nullAllowed() { |
| assertFalse("remove(null) should return false", collection.remove(null)); |
| expectUnchanged(); |
| } |
| |
| @CollectionFeature.Require(absent = SUPPORTS_REMOVE) |
| @CollectionSize.Require(absent = ZERO) |
| public void testIteratorRemove_unsupported() { |
| Iterator<E> iterator = collection.iterator(); |
| iterator.next(); |
| try { |
| iterator.remove(); |
| fail("iterator.remove() should throw UnsupportedOperationException"); |
| } catch (UnsupportedOperationException expected) { |
| } |
| expectUnchanged(); |
| assertTrue(collection.contains(e0())); |
| } |
| |
| @CollectionFeature.Require(SUPPORTS_REMOVE) |
| public void testRemove_wrongType() { |
| try { |
| assertFalse(collection.remove(WrongType.VALUE)); |
| } catch (ClassCastException tolerated) { |
| } |
| expectUnchanged(); |
| } |
| } |