85 lines
2.6 KiB
Java
85 lines
2.6 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 com.google.common.annotations.GwtCompatible;
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import com.google.common.collect.Multiset.Entry;
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import java.util.Collections;
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import junit.framework.TestCase;
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/**
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* Tests for {@link Multisets#immutableEntry}.
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*
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* @author Mike Bostock
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*/
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@GwtCompatible
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public class MultisetsImmutableEntryTest extends TestCase {
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private static final String NE = null;
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private static <E> Entry<E> entry(final E element, final int count) {
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return Multisets.immutableEntry(element, count);
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}
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private static <E> Entry<E> control(E element, int count) {
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return HashMultiset.create(Collections.nCopies(count, element)).entrySet().iterator().next();
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}
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public void testToString() {
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assertEquals("foo", entry("foo", 1).toString());
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assertEquals("bar x 2", entry("bar", 2).toString());
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}
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public void testToStringNull() {
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assertEquals("null", entry(NE, 1).toString());
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assertEquals("null x 2", entry(NE, 2).toString());
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}
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public void testEquals() {
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assertEquals(control("foo", 1), entry("foo", 1));
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assertEquals(control("bar", 2), entry("bar", 2));
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assertFalse(control("foo", 1).equals(entry("foo", 2)));
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assertFalse(entry("foo", 1).equals(control("bar", 1)));
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assertFalse(entry("foo", 1).equals(new Object()));
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assertFalse(entry("foo", 1).equals(null));
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}
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public void testEqualsNull() {
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assertEquals(control(NE, 1), entry(NE, 1));
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assertFalse(control(NE, 1).equals(entry(NE, 2)));
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assertFalse(entry(NE, 1).equals(control("bar", 1)));
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assertFalse(entry(NE, 1).equals(new Object()));
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assertFalse(entry(NE, 1).equals(null));
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}
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public void testHashCode() {
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assertEquals(control("foo", 1).hashCode(), entry("foo", 1).hashCode());
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assertEquals(control("bar", 2).hashCode(), entry("bar", 2).hashCode());
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}
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public void testHashCodeNull() {
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assertEquals(control(NE, 1).hashCode(), entry(NE, 1).hashCode());
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}
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public void testNegativeCount() {
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try {
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entry("foo", -1);
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fail();
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} catch (IllegalArgumentException expected) {
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}
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}
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}
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