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.annotations.J2ktIncompatible; 027import com.google.common.collect.testing.Helpers; 028import com.google.common.collect.testing.WrongType; 029import com.google.common.collect.testing.features.CollectionFeature; 030import com.google.common.collect.testing.features.CollectionSize; 031import java.lang.reflect.Method; 032import java.util.Arrays; 033import java.util.List; 034import org.junit.Ignore; 035 036/** 037 * Tests for {@code Multiset#count}. 038 * 039 * @author Jared Levy 040 */ 041@GwtCompatible(emulated = true) 042@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests. 043public class MultisetCountTester<E> extends AbstractMultisetTester<E> { 044 045 public void testCount_0() { 046 assertEquals("multiset.count(missing) didn't return 0", 0, getMultiset().count(e3())); 047 } 048 049 @CollectionSize.Require(absent = ZERO) 050 public void testCount_1() { 051 assertEquals("multiset.count(present) didn't return 1", 1, getMultiset().count(e0())); 052 } 053 054 @CollectionSize.Require(SEVERAL) 055 public void testCount_3() { 056 initThreeCopies(); 057 assertEquals("multiset.count(thriceContained) didn't return 3", 3, getMultiset().count(e0())); 058 } 059 060 @CollectionFeature.Require(ALLOWS_NULL_QUERIES) 061 public void testCount_nullAbsent() { 062 assertEquals("multiset.count(null) didn't return 0", 0, getMultiset().count(null)); 063 } 064 065 @CollectionFeature.Require(absent = ALLOWS_NULL_QUERIES) 066 public void testCount_null_forbidden() { 067 try { 068 getMultiset().count(null); 069 fail("Expected NullPointerException"); 070 } catch (NullPointerException expected) { 071 } 072 } 073 074 @CollectionSize.Require(absent = ZERO) 075 @CollectionFeature.Require(ALLOWS_NULL_VALUES) 076 public void testCount_nullPresent() { 077 initCollectionWithNullElement(); 078 assertEquals(1, getMultiset().count(null)); 079 } 080 081 public void testCount_wrongType() { 082 assertEquals( 083 "multiset.count(wrongType) didn't return 0", 0, getMultiset().count(WrongType.VALUE)); 084 } 085 086 /** 087 * Returns {@link Method} instances for the read tests that assume multisets support duplicates so 088 * that the test of {@code Multisets.forSet()} can suppress them. 089 */ 090 @J2ktIncompatible 091 @GwtIncompatible // reflection 092 public static List<Method> getCountDuplicateInitializingMethods() { 093 return Arrays.asList(Helpers.getMethod(MultisetCountTester.class, "testCount_3")); 094 } 095}