001/* 002 * Copyright (C) 2007 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.testers; 018 019import static com.google.common.collect.testing.features.CollectionSize.ONE; 020import static com.google.common.collect.testing.features.CollectionSize.ZERO; 021import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEYS; 022import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUES; 023import static com.google.common.collect.testing.features.MapFeature.REJECTS_DUPLICATES_AT_CREATION; 024 025import com.google.common.annotations.GwtCompatible; 026import com.google.common.annotations.GwtIncompatible; 027import com.google.common.annotations.J2ktIncompatible; 028import com.google.common.collect.testing.AbstractMapTester; 029import com.google.common.collect.testing.Helpers; 030import com.google.common.collect.testing.features.CollectionSize; 031import com.google.common.collect.testing.features.MapFeature; 032import java.lang.reflect.Method; 033import java.util.Arrays; 034import java.util.List; 035import java.util.Map.Entry; 036import org.junit.Ignore; 037 038/** 039 * A generic JUnit test which tests creation (typically through a constructor or static factory 040 * method) of a map. Can't be invoked directly; please see {@link 041 * com.google.common.collect.testing.MapTestSuiteBuilder}. 042 * 043 * @author Chris Povirk 044 * @author Kevin Bourrillion 045 */ 046@GwtCompatible(emulated = true) 047@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests. 048public class MapCreationTester<K, V> extends AbstractMapTester<K, V> { 049 @MapFeature.Require(ALLOWS_NULL_KEYS) 050 @CollectionSize.Require(absent = ZERO) 051 public void testCreateWithNullKeySupported() { 052 initMapWithNullKey(); 053 expectContents(createArrayWithNullKey()); 054 } 055 056 @MapFeature.Require(absent = ALLOWS_NULL_KEYS) 057 @CollectionSize.Require(absent = ZERO) 058 public void testCreateWithNullKeyUnsupported() { 059 try { 060 initMapWithNullKey(); 061 fail("Creating a map containing a null key should fail"); 062 } catch (NullPointerException expected) { 063 } 064 } 065 066 @MapFeature.Require(ALLOWS_NULL_VALUES) 067 @CollectionSize.Require(absent = ZERO) 068 public void testCreateWithNullValueSupported() { 069 initMapWithNullValue(); 070 expectContents(createArrayWithNullValue()); 071 } 072 073 @MapFeature.Require(absent = ALLOWS_NULL_VALUES) 074 @CollectionSize.Require(absent = ZERO) 075 public void testCreateWithNullValueUnsupported() { 076 try { 077 initMapWithNullValue(); 078 fail("Creating a map containing a null value should fail"); 079 } catch (NullPointerException expected) { 080 } 081 } 082 083 @MapFeature.Require({ALLOWS_NULL_KEYS, ALLOWS_NULL_VALUES}) 084 @CollectionSize.Require(absent = ZERO) 085 public void testCreateWithNullKeyAndValueSupported() { 086 Entry<K, V>[] entries = createSamplesArray(); 087 entries[getNullLocation()] = entry(null, null); 088 resetMap(entries); 089 expectContents(entries); 090 } 091 092 @MapFeature.Require(value = ALLOWS_NULL_KEYS, absent = REJECTS_DUPLICATES_AT_CREATION) 093 @CollectionSize.Require(absent = {ZERO, ONE}) 094 public void testCreateWithDuplicates_nullDuplicatesNotRejected() { 095 expectFirstRemoved(getEntriesMultipleNullKeys()); 096 } 097 098 @MapFeature.Require(absent = REJECTS_DUPLICATES_AT_CREATION) 099 @CollectionSize.Require(absent = {ZERO, ONE}) 100 public void testCreateWithDuplicates_nonNullDuplicatesNotRejected() { 101 expectFirstRemoved(getEntriesMultipleNonNullKeys()); 102 } 103 104 @MapFeature.Require({ALLOWS_NULL_KEYS, REJECTS_DUPLICATES_AT_CREATION}) 105 @CollectionSize.Require(absent = {ZERO, ONE}) 106 public void testCreateWithDuplicates_nullDuplicatesRejected() { 107 Entry<K, V>[] entries = getEntriesMultipleNullKeys(); 108 try { 109 resetMap(entries); 110 fail("Should reject duplicate null elements at creation"); 111 } catch (IllegalArgumentException expected) { 112 } 113 } 114 115 @MapFeature.Require(REJECTS_DUPLICATES_AT_CREATION) 116 @CollectionSize.Require(absent = {ZERO, ONE}) 117 public void testCreateWithDuplicates_nonNullDuplicatesRejected() { 118 Entry<K, V>[] entries = getEntriesMultipleNonNullKeys(); 119 try { 120 resetMap(entries); 121 fail("Should reject duplicate non-null elements at creation"); 122 } catch (IllegalArgumentException expected) { 123 } 124 } 125 126 private Entry<K, V>[] getEntriesMultipleNullKeys() { 127 Entry<K, V>[] entries = createArrayWithNullKey(); 128 entries[0] = entry(null, entries[0].getValue()); 129 return entries; 130 } 131 132 private Entry<K, V>[] getEntriesMultipleNonNullKeys() { 133 Entry<K, V>[] entries = createSamplesArray(); 134 entries[0] = entry(k1(), v0()); 135 return entries; 136 } 137 138 private void expectFirstRemoved(Entry<K, V>[] entries) { 139 resetMap(entries); 140 141 List<Entry<K, V>> expectedWithDuplicateRemoved = 142 Arrays.asList(entries).subList(1, getNumElements()); 143 expectContents(expectedWithDuplicateRemoved); 144 } 145 146 /** 147 * Returns the {@link Method} instance for {@link #testCreateWithNullKeyUnsupported()} so that 148 * tests can suppress it with {@code FeatureSpecificTestSuiteBuilder.suppressing()} until <a 149 * href="http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=5045147">Sun bug 5045147</a> is fixed. 150 */ 151 @J2ktIncompatible 152 @GwtIncompatible // reflection 153 public static Method getCreateWithNullKeyUnsupportedMethod() { 154 return Helpers.getMethod(MapCreationTester.class, "testCreateWithNullKeyUnsupported"); 155 } 156}