1 /* 2 * Copyright (C) 2013 The Guava Authors 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except 5 * in compliance with the License. You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software distributed under the License 10 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express 11 * or implied. See the License for the specific language governing permissions and limitations under 12 * the License. 13 */ 14 15 package com.google.common.collect.testing.testers; 16 17 import static com.google.common.collect.testing.features.CollectionFeature.NON_STANDARD_TOSTRING; 18 import static com.google.common.collect.testing.features.CollectionSize.ONE; 19 import static com.google.common.collect.testing.features.CollectionSize.ZERO; 20 import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEYS; 21 import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUES; 22 23 import com.google.common.annotations.GwtCompatible; 24 import com.google.common.collect.testing.AbstractMapTester; 25 import com.google.common.collect.testing.features.CollectionFeature; 26 import com.google.common.collect.testing.features.CollectionSize; 27 import com.google.common.collect.testing.features.MapFeature; 28 import java.util.LinkedHashMap; 29 import java.util.Map; 30 import java.util.Map.Entry; 31 import java.util.Set; 32 import org.junit.Ignore; 33 34 /** 35 * A generic JUnit test which tests {@code toString()} operations on a map. Can't be invoked 36 * directly; please see {@link com.google.common.collect.testing.MapTestSuiteBuilder}. 37 * 38 * @author Kevin Bourrillion 39 * @author Louis Wasserman 40 */ 41 @GwtCompatible 42 @Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests. 43 public class MapToStringTester<K, V> extends AbstractMapTester<K, V> { testToString_minimal()44 public void testToString_minimal() { 45 assertNotNull("toString() should not return null", getMap().toString()); 46 } 47 48 @CollectionSize.Require(ZERO) 49 @CollectionFeature.Require(absent = NON_STANDARD_TOSTRING) testToString_size0()50 public void testToString_size0() { 51 assertEquals("emptyMap.toString should return {}", "{}", getMap().toString()); 52 } 53 54 @CollectionSize.Require(ONE) 55 @CollectionFeature.Require(absent = NON_STANDARD_TOSTRING) testToString_size1()56 public void testToString_size1() { 57 assertEquals("size1Map.toString should return {entry}", "{" + e0() + "}", getMap().toString()); 58 } 59 60 @CollectionSize.Require(absent = ZERO) 61 @CollectionFeature.Require(absent = NON_STANDARD_TOSTRING) 62 @MapFeature.Require(ALLOWS_NULL_KEYS) testToStringWithNullKey()63 public void testToStringWithNullKey() { 64 initMapWithNullKey(); 65 testToString_formatting(); 66 } 67 68 @CollectionSize.Require(absent = ZERO) 69 @CollectionFeature.Require(absent = NON_STANDARD_TOSTRING) 70 @MapFeature.Require(ALLOWS_NULL_VALUES) testToStringWithNullValue()71 public void testToStringWithNullValue() { 72 initMapWithNullValue(); 73 testToString_formatting(); 74 } 75 76 @CollectionFeature.Require(absent = NON_STANDARD_TOSTRING) testToString_formatting()77 public void testToString_formatting() { 78 assertEquals( 79 "map.toString() incorrect", expectedToString(getMap().entrySet()), getMap().toString()); 80 } 81 expectedToString(Set<Entry<K, V>> entries)82 private String expectedToString(Set<Entry<K, V>> entries) { 83 Map<K, V> reference = new LinkedHashMap<>(); 84 for (Entry<K, V> entry : entries) { 85 reference.put(entry.getKey(), entry.getValue()); 86 } 87 return reference.toString(); 88 } 89 } 90