/*
* 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;
import static com.google.common.truth.Truth.assertThat;
import static java.util.Arrays.asList;
import com.google.common.annotations.GwtCompatible;
import com.google.common.annotations.GwtIncompatible;
import com.google.common.collect.testing.features.CollectionFeature;
import com.google.common.collect.testing.features.CollectionSize;
import com.google.common.collect.testing.google.MultisetFeature;
import com.google.common.collect.testing.google.MultisetTestSuiteBuilder;
import com.google.common.collect.testing.google.TestStringMultisetGenerator;
import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;
import java.util.Arrays;
import java.util.List;
/**
* Unit test for {@link LinkedHashMultiset}.
*
* @author Kevin Bourrillion
*/
@GwtCompatible(emulated = true)
public class LinkedHashMultisetTest extends TestCase {
@GwtIncompatible("suite")
public static Test suite() {
TestSuite suite = new TestSuite();
suite.addTest(MultisetTestSuiteBuilder.using(linkedHashMultisetGenerator())
.named("LinkedHashMultiset")
.withFeatures(CollectionSize.ANY,
CollectionFeature.KNOWN_ORDER,
CollectionFeature.FAILS_FAST_ON_CONCURRENT_MODIFICATION,
CollectionFeature.ALLOWS_NULL_VALUES,
CollectionFeature.SERIALIZABLE,
CollectionFeature.GENERAL_PURPOSE,
MultisetFeature.ENTRIES_ARE_VIEWS)
.createTestSuite());
suite.addTestSuite(LinkedHashMultisetTest.class);
return suite;
}
private static TestStringMultisetGenerator linkedHashMultisetGenerator() {
return new TestStringMultisetGenerator() {
@Override protected Multiset<String> create(String[] elements) {
return LinkedHashMultiset.create(asList(elements));
}
@Override
public List<String> order(List<String> insertionOrder) {
List<String> order = Lists.newArrayList();
for (String s : insertionOrder) {
int index = order.indexOf(s);
if (index == -1) {
order.add(s);
} else {
order.add(index, s);
}
}
return order;
}
};
}
public void testCreate() {
Multiset<String> multiset = LinkedHashMultiset.create();
multiset.add("foo", 2);
multiset.add("bar");
assertEquals(3, multiset.size());
assertEquals(2, multiset.count("foo"));
assertEquals("[foo x 2, bar]", multiset.toString());
}
public void testCreateWithSize() {
Multiset<String> multiset = LinkedHashMultiset.create(50);
multiset.add("foo", 2);
multiset.add("bar");
assertEquals(3, multiset.size());
assertEquals(2, multiset.count("foo"));
assertEquals("[foo x 2, bar]", multiset.toString());
}
public void testCreateFromIterable() {
Multiset<String> multiset
= LinkedHashMultiset.create(Arrays.asList("foo", "bar", "foo"));
assertEquals(3, multiset.size());
assertEquals(2, multiset.count("foo"));
assertEquals("[foo x 2, bar]", multiset.toString());
}
public void testToString() {
Multiset<String> ms = LinkedHashMultiset.create();
ms.add("a", 3);
ms.add("c", 1);
ms.add("b", 2);
assertEquals("[a x 3, c, b x 2]", ms.toString());
}
public void testLosesPlaceInLine() throws Exception {
Multiset<String> ms = LinkedHashMultiset.create();
ms.add("a");
ms.add("b", 2);
ms.add("c");
assertThat(ms.elementSet()).containsExactly("a", "b", "c").inOrder();
ms.remove("b");
assertThat(ms.elementSet()).containsExactly("a", "b", "c").inOrder();
ms.add("b");
assertThat(ms.elementSet()).containsExactly("a", "b", "c").inOrder();
ms.remove("b", 2);
ms.add("b");
assertThat(ms.elementSet()).containsExactly("a", "c", "b").inOrder();
}
}