com.google.common.collect.testing.testers.CollectionRemoveAllTester Maven / Gradle / Ivy
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/*
* 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.MinimalCollection;
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.Collections;
import java.util.ConcurrentModificationException;
import java.util.Iterator;
/**
* A generic JUnit test which tests {@code removeAll} operations on a
* collection. Can't be invoked directly; please see
* {@link com.google.common.collect.testing.CollectionTestSuiteBuilder}.
*
* This class is GWT compatible.
*
* @author George van den Driessche
* @author Chris Povirk
*/
@SuppressWarnings("unchecked") // too many "unchecked generic array creations"
@GwtCompatible
public class CollectionRemoveAllTester extends AbstractCollectionTester {
@CollectionFeature.Require(SUPPORTS_REMOVE)
public void testRemoveAll_emptyCollection() {
assertFalse("removeAll(emptyCollection) should return false",
collection.removeAll(MinimalCollection.of()));
expectUnchanged();
}
@CollectionFeature.Require(SUPPORTS_REMOVE)
public void testRemoveAll_nonePresent() {
assertFalse("removeAll(disjointCollection) should return false",
collection.removeAll(MinimalCollection.of(samples.e3)));
expectUnchanged();
}
@CollectionFeature.Require(SUPPORTS_REMOVE)
@CollectionSize.Require(absent = ZERO)
public void testRemoveAll_allPresent() {
assertTrue("removeAll(intersectingCollection) should return true",
collection.removeAll(MinimalCollection.of(samples.e0)));
expectMissing(samples.e0);
}
@CollectionFeature.Require(SUPPORTS_REMOVE)
@CollectionSize.Require(absent = ZERO)
public void testRemoveAll_somePresent() {
assertTrue("removeAll(intersectingCollection) should return true",
collection.removeAll(MinimalCollection.of(samples.e0, samples.e3)));
expectMissing(samples.e0);
}
@CollectionFeature.Require({SUPPORTS_REMOVE,
FAILS_FAST_ON_CONCURRENT_MODIFICATION})
@CollectionSize.Require(SEVERAL)
public void testRemoveAllSomePresentConcurrentWithIteration() {
try {
Iterator iterator = collection.iterator();
assertTrue(collection.removeAll(MinimalCollection.of(samples.e0, samples.e3)));
iterator.next();
fail("Expected ConcurrentModificationException");
} catch (ConcurrentModificationException expected) {
// success
}
}
/**
* Trigger the other.size() >= this.size() case in AbstractSet.removeAll().
*/
@CollectionFeature.Require(SUPPORTS_REMOVE)
@CollectionSize.Require(absent = ZERO)
public void testRemoveAll_somePresentLargeCollectionToRemove() {
assertTrue("removeAll(largeIntersectingCollection) should return true",
collection.removeAll(MinimalCollection.of(
samples.e0, samples.e0, samples.e0,
samples.e3, samples.e3, samples.e3)));
expectMissing(samples.e0);
}
@CollectionFeature.Require(absent = SUPPORTS_REMOVE)
public void testRemoveAll_unsupportedEmptyCollection() {
try {
assertFalse("removeAll(emptyCollection) should return false or throw "
+ "UnsupportedOperationException",
collection.removeAll(MinimalCollection.of()));
} catch (UnsupportedOperationException tolerated) {
}
expectUnchanged();
}
@CollectionFeature.Require(absent = SUPPORTS_REMOVE)
public void testRemoveAll_unsupportedNonePresent() {
try {
assertFalse("removeAll(disjointCollection) should return false or throw "
+ "UnsupportedOperationException",
collection.removeAll(MinimalCollection.of(samples.e3)));
} catch (UnsupportedOperationException tolerated) {
}
expectUnchanged();
}
@CollectionFeature.Require(absent = SUPPORTS_REMOVE)
@CollectionSize.Require(absent = ZERO)
public void testRemoveAll_unsupportedPresent() {
try {
collection.removeAll(MinimalCollection.of(samples.e0));
fail("removeAll(intersectingCollection) should throw "
+ "UnsupportedOperationException");
} catch (UnsupportedOperationException expected) {
}
expectUnchanged();
assertTrue(collection.contains(samples.e0));
}
/*
* AbstractCollection fails the removeAll(null) test when the subject
* collection is empty, but we'd still like to test removeAll(null) when we
* can. We split the test into empty and non-empty cases. This allows us to
* suppress only the former.
*/
@CollectionFeature.Require(SUPPORTS_REMOVE)
@CollectionSize.Require(ZERO)
public void testRemoveAll_nullCollectionReferenceEmptySubject() {
try {
collection.removeAll(null);
// Returning successfully is not ideal, but tolerated.
} catch (NullPointerException expected) {
}
}
@CollectionFeature.Require(SUPPORTS_REMOVE)
@CollectionSize.Require(absent = ZERO)
public void testRemoveAll_nullCollectionReferenceNonEmptySubject() {
try {
collection.removeAll(null);
fail("removeAll(null) should throw NullPointerException");
} catch (NullPointerException expected) {
}
}
@CollectionFeature.Require(value = SUPPORTS_REMOVE,
absent = ALLOWS_NULL_QUERIES)
public void testRemoveAll_containsNullNo() {
MinimalCollection containsNull = MinimalCollection.of((Object) null);
try {
assertFalse("removeAll(containsNull) should return false or throw",
collection.removeAll(containsNull));
} catch (NullPointerException tolerated) {
}
expectUnchanged();
}
@CollectionFeature.Require({SUPPORTS_REMOVE, ALLOWS_NULL_QUERIES})
public void testRemoveAll_containsNullNoButAllowed() {
MinimalCollection containsNull = MinimalCollection.of((Object) null);
assertFalse("removeAll(containsNull) should return false",
collection.removeAll(containsNull));
expectUnchanged();
}
@CollectionFeature.Require({SUPPORTS_REMOVE, ALLOWS_NULL_VALUES})
@CollectionSize.Require(absent = ZERO)
public void testRemoveAll_containsNullYes() {
initCollectionWithNullElement();
assertTrue("removeAll(containsNull) should return true",
collection.removeAll(Collections.singleton(null)));
// TODO: make this work with MinimalCollection
}
@CollectionFeature.Require(SUPPORTS_REMOVE)
public void testRemoveAll_containsWrongType() {
try {
assertFalse("removeAll(containsWrongType) should return false or throw",
collection.removeAll(MinimalCollection.of(WrongType.VALUE)));
} catch (ClassCastException tolerated) {
}
expectUnchanged();
}
}