001/* 002 * Copyright (C) 2013 The Guava Authors 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package com.google.common.collect.testing.google; 018 019import static com.google.common.collect.testing.features.CollectionFeature.ALLOWS_NULL_QUERIES; 020import static com.google.common.collect.testing.features.CollectionFeature.ALLOWS_NULL_VALUES; 021import static com.google.common.collect.testing.features.CollectionSize.SEVERAL; 022import static com.google.common.collect.testing.features.CollectionSize.ZERO; 023 024import com.google.common.annotations.GwtCompatible; 025import com.google.common.annotations.GwtIncompatible; 026import com.google.common.collect.testing.Helpers; 027import com.google.common.collect.testing.WrongType; 028import com.google.common.collect.testing.features.CollectionFeature; 029import com.google.common.collect.testing.features.CollectionSize; 030import java.lang.reflect.Method; 031import java.util.Arrays; 032import java.util.List; 033import org.junit.Ignore; 034 035/** 036 * Tests for {@code Multiset#count}. 037 * 038 * @author Jared Levy 039 */ 040@GwtCompatible(emulated = true) 041@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests. 042public class MultisetCountTester<E> extends AbstractMultisetTester<E> { 043 044 public void testCount_0() { 045 assertEquals("multiset.count(missing) didn't return 0", 0, getMultiset().count(e3())); 046 } 047 048 @CollectionSize.Require(absent = ZERO) 049 public void testCount_1() { 050 assertEquals("multiset.count(present) didn't return 1", 1, getMultiset().count(e0())); 051 } 052 053 @CollectionSize.Require(SEVERAL) 054 public void testCount_3() { 055 initThreeCopies(); 056 assertEquals("multiset.count(thriceContained) didn't return 3", 3, getMultiset().count(e0())); 057 } 058 059 @CollectionFeature.Require(ALLOWS_NULL_QUERIES) 060 public void testCount_nullAbsent() { 061 assertEquals("multiset.count(null) didn't return 0", 0, getMultiset().count(null)); 062 } 063 064 @CollectionFeature.Require(absent = ALLOWS_NULL_QUERIES) 065 public void testCount_null_forbidden() { 066 try { 067 getMultiset().count(null); 068 fail("Expected NullPointerException"); 069 } catch (NullPointerException expected) { 070 } 071 } 072 073 @CollectionSize.Require(absent = ZERO) 074 @CollectionFeature.Require(ALLOWS_NULL_VALUES) 075 public void testCount_nullPresent() { 076 initCollectionWithNullElement(); 077 assertEquals(1, getMultiset().count(null)); 078 } 079 080 public void testCount_wrongType() { 081 assertEquals( 082 "multiset.count(wrongType) didn't return 0", 0, getMultiset().count(WrongType.VALUE)); 083 } 084 085 /** 086 * Returns {@link Method} instances for the read tests that assume multisets support duplicates so 087 * that the test of {@code Multisets.forSet()} can suppress them. 088 */ 089 @GwtIncompatible // reflection 090 public static List<Method> getCountDuplicateInitializingMethods() { 091 return Arrays.asList(Helpers.getMethod(MultisetCountTester.class, "testCount_3")); 092 } 093}