| /* |
| * 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.CollectionSize.SEVERAL; |
| import static com.google.common.collect.testing.features.CollectionSize.ZERO; |
| import static com.google.common.collect.testing.features.MapFeature.FAILS_FAST_ON_CONCURRENT_MODIFICATION; |
| import static com.google.common.collect.testing.features.MapFeature.SUPPORTS_REMOVE; |
| |
| import com.google.common.annotations.GwtCompatible; |
| import com.google.common.collect.testing.AbstractMapTester; |
| import com.google.common.collect.testing.features.CollectionSize; |
| import com.google.common.collect.testing.features.MapFeature; |
| import java.util.ConcurrentModificationException; |
| import java.util.Iterator; |
| import java.util.Map.Entry; |
| import org.junit.Ignore; |
| |
| /** |
| * A generic JUnit test which tests {@code clear()} operations on a map. Can't be invoked directly; |
| * please see {@link com.google.common.collect.testing.MapTestSuiteBuilder}. |
| * |
| * @author George van den Driessche |
| * @author Chris Povirk |
| */ |
| @GwtCompatible |
| @Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests. |
| public class MapClearTester<K, V> extends AbstractMapTester<K, V> { |
| @MapFeature.Require(SUPPORTS_REMOVE) |
| public void testClear() { |
| getMap().clear(); |
| assertTrue("After clear(), a map should be empty.", getMap().isEmpty()); |
| assertEquals(0, getMap().size()); |
| assertFalse(getMap().entrySet().iterator().hasNext()); |
| } |
| |
| @MapFeature.Require({FAILS_FAST_ON_CONCURRENT_MODIFICATION, SUPPORTS_REMOVE}) |
| @CollectionSize.Require(SEVERAL) |
| public void testClearConcurrentWithEntrySetIteration() { |
| try { |
| Iterator<Entry<K, V>> iterator = getMap().entrySet().iterator(); |
| getMap().clear(); |
| iterator.next(); |
| fail("Expected ConcurrentModificationException"); |
| } catch (ConcurrentModificationException expected) { |
| // success |
| } |
| } |
| |
| @MapFeature.Require({FAILS_FAST_ON_CONCURRENT_MODIFICATION, SUPPORTS_REMOVE}) |
| @CollectionSize.Require(SEVERAL) |
| public void testClearConcurrentWithKeySetIteration() { |
| try { |
| Iterator<K> iterator = getMap().keySet().iterator(); |
| getMap().clear(); |
| iterator.next(); |
| fail("Expected ConcurrentModificationException"); |
| } catch (ConcurrentModificationException expected) { |
| // success |
| } |
| } |
| |
| @MapFeature.Require({FAILS_FAST_ON_CONCURRENT_MODIFICATION, SUPPORTS_REMOVE}) |
| @CollectionSize.Require(SEVERAL) |
| public void testClearConcurrentWithValuesIteration() { |
| try { |
| Iterator<V> iterator = getMap().values().iterator(); |
| getMap().clear(); |
| iterator.next(); |
| fail("Expected ConcurrentModificationException"); |
| } catch (ConcurrentModificationException expected) { |
| // success |
| } |
| } |
| |
| @MapFeature.Require(absent = SUPPORTS_REMOVE) |
| @CollectionSize.Require(absent = ZERO) |
| public void testClear_unsupported() { |
| try { |
| getMap().clear(); |
| fail( |
| "clear() should throw UnsupportedOperation if a map does " |
| + "not support it and is not empty."); |
| } catch (UnsupportedOperationException expected) { |
| } |
| expectUnchanged(); |
| } |
| |
| @MapFeature.Require(absent = SUPPORTS_REMOVE) |
| @CollectionSize.Require(ZERO) |
| public void testClear_unsupportedByEmptyCollection() { |
| try { |
| getMap().clear(); |
| } catch (UnsupportedOperationException tolerated) { |
| } |
| expectUnchanged(); |
| } |
| } |