1 /* 2 * Copyright (C) 2007 The Guava Authors 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.google.common.collect; 18 19 import com.google.common.annotations.GwtCompatible; 20 import com.google.common.collect.Multiset.Entry; 21 import java.util.Collections; 22 import junit.framework.TestCase; 23 24 /** 25 * Tests for {@link Multisets#immutableEntry}. 26 * 27 * @author Mike Bostock 28 */ 29 @GwtCompatible 30 public class MultisetsImmutableEntryTest extends TestCase { 31 private static final String NE = null; 32 entry(final E element, final int count)33 private static <E> Entry<E> entry(final E element, final int count) { 34 return Multisets.immutableEntry(element, count); 35 } 36 control(E element, int count)37 private static <E> Entry<E> control(E element, int count) { 38 return HashMultiset.create(Collections.nCopies(count, element)).entrySet().iterator().next(); 39 } 40 testToString()41 public void testToString() { 42 assertEquals("foo", entry("foo", 1).toString()); 43 assertEquals("bar x 2", entry("bar", 2).toString()); 44 } 45 testToStringNull()46 public void testToStringNull() { 47 assertEquals("null", entry(NE, 1).toString()); 48 assertEquals("null x 2", entry(NE, 2).toString()); 49 } 50 testEquals()51 public void testEquals() { 52 assertEquals(control("foo", 1), entry("foo", 1)); 53 assertEquals(control("bar", 2), entry("bar", 2)); 54 assertFalse(control("foo", 1).equals(entry("foo", 2))); 55 assertFalse(entry("foo", 1).equals(control("bar", 1))); 56 assertFalse(entry("foo", 1).equals(new Object())); 57 assertFalse(entry("foo", 1).equals(null)); 58 } 59 testEqualsNull()60 public void testEqualsNull() { 61 assertEquals(control(NE, 1), entry(NE, 1)); 62 assertFalse(control(NE, 1).equals(entry(NE, 2))); 63 assertFalse(entry(NE, 1).equals(control("bar", 1))); 64 assertFalse(entry(NE, 1).equals(new Object())); 65 assertFalse(entry(NE, 1).equals(null)); 66 } 67 testHashCode()68 public void testHashCode() { 69 assertEquals(control("foo", 1).hashCode(), entry("foo", 1).hashCode()); 70 assertEquals(control("bar", 2).hashCode(), entry("bar", 2).hashCode()); 71 } 72 testHashCodeNull()73 public void testHashCodeNull() { 74 assertEquals(control(NE, 1).hashCode(), entry(NE, 1).hashCode()); 75 } 76 testNegativeCount()77 public void testNegativeCount() { 78 try { 79 entry("foo", -1); 80 fail(); 81 } catch (IllegalArgumentException expected) { 82 } 83 } 84 } 85