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