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/*
* Copyright (C) 2007 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_VALUES;
import static com.google.common.collect.testing.features.CollectionFeature.SUPPORTS_ADD;
import static com.google.common.collect.testing.features.CollectionSize.ZERO;
import com.google.common.annotations.GwtCompatible;
import com.google.common.annotations.GwtIncompatible;
import com.google.common.collect.testing.Helpers;
import com.google.common.collect.testing.features.CollectionFeature;
import com.google.common.collect.testing.features.CollectionSize;
import java.lang.reflect.Method;
import java.util.List;
/**
* A generic JUnit test which tests {@code add(Object)} operations on a list.
* Can't be invoked directly; please see
* {@link com.google.common.collect.testing.ListTestSuiteBuilder}.
*
* <p>This class is GWT compatible.
*
* @author Chris Povirk
*/
@SuppressWarnings("unchecked") // too many "unchecked generic array creations"
@GwtCompatible(emulated = true)
public class ListAddTester<E> extends AbstractListTester<E> {
@CollectionFeature.Require(SUPPORTS_ADD)
@CollectionSize.Require(absent = ZERO)
public void testAdd_supportedPresent() {
assertTrue("add(present) should return true", getList().add(samples.e0));
expectAdded(samples.e0);
}
@CollectionFeature.Require(absent = SUPPORTS_ADD)
@CollectionSize.Require(absent = ZERO)
/*
* absent = ZERO isn't required, since unmodList.add() must
* throw regardless, but it keeps the method name accurate.
*/
public void testAdd_unsupportedPresent() {
try {
getList().add(samples.e0);
fail("add(present) should throw");
} catch (UnsupportedOperationException expected) {
}
}
@CollectionFeature.Require(value = {SUPPORTS_ADD, ALLOWS_NULL_VALUES})
@CollectionSize.Require(absent = ZERO)
public void testAdd_supportedNullPresent() {
E[] array = createArrayWithNullElement();
collection = getSubjectGenerator().create(array);
assertTrue("add(nullPresent) should return true", getList().add(null));
List<E> expected = Helpers.copyToList(array);
expected.add(null);
expectContents(expected);
}
/**
* Returns the {@link Method} instance for
* {@link #testAdd_supportedNullPresent()} so that tests can suppress it. See
* {@link CollectionAddTester#getAddNullSupportedMethod()} for details.
*/
@GwtIncompatible("reflection")
public static Method getAddSupportedNullPresentMethod() {
return Helpers.getMethod(ListAddTester.class, "testAdd_supportedNullPresent");
}
}
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