com.google.common.collect.testing.google.MultisetElementSetTester Maven / Gradle / Ivy
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Guava testlib is a set of java classes used for more convenient
unit testing - particularly to assist the tests for Guava itself.
/*
* Copyright (C) 2013 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.google;
import static com.google.common.collect.testing.Helpers.assertEmpty;
import static com.google.common.collect.testing.features.CollectionFeature.SUPPORTS_ADD;
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.annotations.GwtIncompatible;
import com.google.common.annotations.J2ktIncompatible;
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.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Set;
import org.junit.Ignore;
/**
* Tests for {@code Multiset.elementSet()} not covered by the derived {@code SetTestSuiteBuilder}.
*
* @author Louis Wasserman
*/
@GwtCompatible
@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
@SuppressWarnings("JUnit4ClassUsedInJUnit3")
public class MultisetElementSetTester extends AbstractMultisetTester {
@CollectionFeature.Require(SUPPORTS_ADD)
public void testElementSetReflectsAddAbsent() {
Set elementSet = getMultiset().elementSet();
assertFalse(elementSet.contains(e3()));
getMultiset().add(e3(), 4);
assertTrue(elementSet.contains(e3()));
}
@CollectionSize.Require(absent = ZERO)
@CollectionFeature.Require(SUPPORTS_REMOVE)
public void testElementSetReflectsRemove() {
Set elementSet = getMultiset().elementSet();
assertTrue(elementSet.contains(e0()));
getMultiset().removeAll(Collections.singleton(e0()));
assertFalse(elementSet.contains(e0()));
}
@CollectionSize.Require(absent = ZERO)
@CollectionFeature.Require(SUPPORTS_REMOVE)
public void testElementSetRemovePropagatesToMultiset() {
Set elementSet = getMultiset().elementSet();
int size = getNumElements();
int expectedSize = size - getMultiset().count(e0());
assertTrue(elementSet.remove(e0()));
assertFalse(getMultiset().contains(e0()));
assertEquals(expectedSize, getMultiset().size());
}
@CollectionSize.Require(SEVERAL)
@CollectionFeature.Require(SUPPORTS_REMOVE)
public void testElementSetRemoveDuplicatePropagatesToMultiset() {
initThreeCopies();
int size = getNumElements();
int expectedSize = size - getMultiset().count(e0());
Set elementSet = getMultiset().elementSet();
assertTrue(elementSet.remove(e0()));
assertEmpty(getMultiset());
assertEquals(expectedSize, getMultiset().size());
}
@CollectionFeature.Require(SUPPORTS_REMOVE)
public void testElementSetRemoveAbsent() {
Set elementSet = getMultiset().elementSet();
assertFalse(elementSet.remove(e3()));
expectUnchanged();
}
@CollectionFeature.Require(SUPPORTS_REMOVE)
public void testElementSetClear() {
getMultiset().elementSet().clear();
assertEmpty(getMultiset());
}
/**
* Returns {@link Method} instances for the read tests that assume multisets support duplicates so
* that the test of {@code Multisets.forSet()} can suppress them.
*/
@J2ktIncompatible
@GwtIncompatible // reflection
public static List getElementSetDuplicateInitializingMethods() {
return Arrays.asList(
Helpers.getMethod(
MultisetElementSetTester.class, "testElementSetRemoveDuplicatePropagatesToMultiset"));
}
}