134 lines
4.4 KiB
Java
134 lines
4.4 KiB
Java
/*
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* Copyright (C) 2007 The Guava Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.common.collect;
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import static com.google.common.truth.Truth.assertThat;
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import static java.util.Arrays.asList;
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import com.google.common.annotations.GwtCompatible;
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import com.google.common.annotations.GwtIncompatible;
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import com.google.common.collect.testing.features.CollectionFeature;
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import com.google.common.collect.testing.features.CollectionSize;
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import com.google.common.collect.testing.google.MultisetFeature;
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import com.google.common.collect.testing.google.MultisetTestSuiteBuilder;
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import com.google.common.collect.testing.google.TestStringMultisetGenerator;
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import java.util.Arrays;
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import java.util.List;
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import junit.framework.Test;
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import junit.framework.TestCase;
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import junit.framework.TestSuite;
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/**
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* Unit test for {@link LinkedHashMultiset}.
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*
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* @author Kevin Bourrillion
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*/
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@GwtCompatible(emulated = true)
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public class LinkedHashMultisetTest extends TestCase {
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@GwtIncompatible // suite
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public static Test suite() {
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TestSuite suite = new TestSuite();
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suite.addTest(
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MultisetTestSuiteBuilder.using(linkedHashMultisetGenerator())
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.named("LinkedHashMultiset")
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.withFeatures(
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CollectionSize.ANY,
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CollectionFeature.KNOWN_ORDER,
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CollectionFeature.FAILS_FAST_ON_CONCURRENT_MODIFICATION,
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CollectionFeature.ALLOWS_NULL_VALUES,
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CollectionFeature.SERIALIZABLE,
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CollectionFeature.GENERAL_PURPOSE,
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MultisetFeature.ENTRIES_ARE_VIEWS)
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.createTestSuite());
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suite.addTestSuite(LinkedHashMultisetTest.class);
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return suite;
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}
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private static TestStringMultisetGenerator linkedHashMultisetGenerator() {
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return new TestStringMultisetGenerator() {
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@Override
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protected Multiset<String> create(String[] elements) {
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return LinkedHashMultiset.create(asList(elements));
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}
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@Override
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public List<String> order(List<String> insertionOrder) {
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List<String> order = Lists.newArrayList();
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for (String s : insertionOrder) {
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int index = order.indexOf(s);
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if (index == -1) {
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order.add(s);
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} else {
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order.add(index, s);
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}
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}
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return order;
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}
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};
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}
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public void testCreate() {
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Multiset<String> multiset = LinkedHashMultiset.create();
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multiset.add("foo", 2);
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multiset.add("bar");
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assertEquals(3, multiset.size());
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assertEquals(2, multiset.count("foo"));
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assertEquals("[foo x 2, bar]", multiset.toString());
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}
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public void testCreateWithSize() {
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Multiset<String> multiset = LinkedHashMultiset.create(50);
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multiset.add("foo", 2);
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multiset.add("bar");
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assertEquals(3, multiset.size());
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assertEquals(2, multiset.count("foo"));
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assertEquals("[foo x 2, bar]", multiset.toString());
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}
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public void testCreateFromIterable() {
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Multiset<String> multiset = LinkedHashMultiset.create(Arrays.asList("foo", "bar", "foo"));
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assertEquals(3, multiset.size());
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assertEquals(2, multiset.count("foo"));
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assertEquals("[foo x 2, bar]", multiset.toString());
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}
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public void testToString() {
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Multiset<String> ms = LinkedHashMultiset.create();
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ms.add("a", 3);
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ms.add("c", 1);
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ms.add("b", 2);
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assertEquals("[a x 3, c, b x 2]", ms.toString());
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}
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public void testLosesPlaceInLine() throws Exception {
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Multiset<String> ms = LinkedHashMultiset.create();
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ms.add("a");
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ms.add("b", 2);
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ms.add("c");
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assertThat(ms.elementSet()).containsExactly("a", "b", "c").inOrder();
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ms.remove("b");
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assertThat(ms.elementSet()).containsExactly("a", "b", "c").inOrder();
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ms.add("b");
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assertThat(ms.elementSet()).containsExactly("a", "b", "c").inOrder();
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ms.remove("b", 2);
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ms.add("b");
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assertThat(ms.elementSet()).containsExactly("a", "c", "b").inOrder();
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}
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}
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