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.Helpers.getMethod; 020import static com.google.common.collect.testing.features.CollectionFeature.ALLOWS_NULL_QUERIES; 021import static com.google.common.collect.testing.features.CollectionFeature.ALLOWS_NULL_VALUES; 022import static com.google.common.collect.testing.features.CollectionSize.SEVERAL; 023import static com.google.common.collect.testing.features.CollectionSize.ZERO; 024import static com.google.common.collect.testing.google.ReflectionFreeAssertThrows.assertThrows; 025import static java.util.Arrays.asList; 026 027import com.google.common.annotations.GwtCompatible; 028import com.google.common.annotations.GwtIncompatible; 029import com.google.common.annotations.J2ktIncompatible; 030import com.google.common.collect.testing.WrongType; 031import com.google.common.collect.testing.features.CollectionFeature; 032import com.google.common.collect.testing.features.CollectionSize; 033import java.lang.reflect.Method; 034import java.util.List; 035import org.junit.Ignore; 036 037/** 038 * Tests for {@code Multiset#count}. 039 * 040 * @author Jared Levy 041 */ 042@GwtCompatible(emulated = true) 043@Ignore("test runners must not instantiate and run this directly, only via suites we build") 044// @Ignore affects the Android test runner, which respects JUnit 4 annotations on JUnit 3 tests. 045@SuppressWarnings("JUnit4ClassUsedInJUnit3") 046public class MultisetCountTester<E> extends AbstractMultisetTester<E> { 047 048 public void testCount_0() { 049 assertEquals("multiset.count(missing) didn't return 0", 0, getMultiset().count(e3())); 050 } 051 052 @CollectionSize.Require(absent = ZERO) 053 public void testCount_1() { 054 assertEquals("multiset.count(present) didn't return 1", 1, getMultiset().count(e0())); 055 } 056 057 @CollectionSize.Require(SEVERAL) 058 public void testCount_3() { 059 initThreeCopies(); 060 assertEquals("multiset.count(thriceContained) didn't return 3", 3, getMultiset().count(e0())); 061 } 062 063 @CollectionFeature.Require(ALLOWS_NULL_QUERIES) 064 public void testCount_nullAbsent() { 065 assertEquals("multiset.count(null) didn't return 0", 0, getMultiset().count(null)); 066 } 067 068 @CollectionFeature.Require(absent = ALLOWS_NULL_QUERIES) 069 public void testCount_null_forbidden() { 070 assertThrows(NullPointerException.class, () -> getMultiset().count(null)); 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 @J2ktIncompatible 090 @GwtIncompatible // reflection 091 public static List<Method> getCountDuplicateInitializingMethods() { 092 return asList(getMethod(MultisetCountTester.class, "testCount_3")); 093 } 094}