001/*
002 * Copyright (C) 2015 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.ZERO;
020import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEYS;
021import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEY_QUERIES;
022import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUES;
023
024import com.google.common.annotations.GwtCompatible;
025import com.google.common.collect.testing.AbstractMapTester;
026import com.google.common.collect.testing.WrongType;
027import com.google.common.collect.testing.features.CollectionSize;
028import com.google.common.collect.testing.features.MapFeature;
029import java.util.Map;
030import org.junit.Ignore;
031
032/**
033 * A generic JUnit test which tests {@link Map#getOrDefault}. Can't be invoked directly; please see
034 * {@link com.google.common.collect.testing.MapTestSuiteBuilder}.
035 *
036 * @author Louis Wasserman
037 */
038@GwtCompatible
039@Ignore("test runners must not instantiate and run this directly, only via suites we build")
040// @Ignore affects the Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
041@SuppressWarnings("JUnit4ClassUsedInJUnit3")
042public class MapGetOrDefaultTester<K, V> extends AbstractMapTester<K, V> {
043  @CollectionSize.Require(absent = ZERO)
044  public void testGetOrDefault_present() {
045    assertEquals(
046        "getOrDefault(present, def) should return the associated value",
047        v0(),
048        getMap().getOrDefault(k0(), v3()));
049  }
050
051  @CollectionSize.Require(absent = ZERO)
052  public void testGetOrDefault_presentNullDefault() {
053    assertEquals(
054        "getOrDefault(present, null) should return the associated value",
055        v0(),
056        getMap().getOrDefault(k0(), null));
057  }
058
059  public void testGetOrDefault_absent() {
060    assertEquals(
061        "getOrDefault(absent, def) should return the default value",
062        v3(),
063        getMap().getOrDefault(k3(), v3()));
064  }
065
066  public void testGetOrDefault_absentNullDefault() {
067    assertNull("getOrDefault(absent, null) should return null", getMap().getOrDefault(k3(), null));
068  }
069
070  @MapFeature.Require(ALLOWS_NULL_KEY_QUERIES)
071  public void testGetOrDefault_absentNull() {
072    assertEquals(
073        "getOrDefault(null, def) should return the default value",
074        v3(),
075        getMap().getOrDefault(null, v3()));
076  }
077
078  @MapFeature.Require(absent = ALLOWS_NULL_KEY_QUERIES)
079  public void testGetOrDefault_nullAbsentAndUnsupported() {
080    try {
081      assertEquals(
082          "getOrDefault(null, def) should return default or throw",
083          v3(),
084          getMap().getOrDefault(null, v3()));
085    } catch (NullPointerException tolerated) {
086    }
087  }
088
089  @MapFeature.Require(ALLOWS_NULL_KEYS)
090  @CollectionSize.Require(absent = ZERO)
091  public void testGetOrDefault_nonNullWhenNullContained() {
092    initMapWithNullKey();
093    assertEquals(
094        "getOrDefault(absent, default) should return default",
095        v3(),
096        getMap().getOrDefault(k3(), v3()));
097  }
098
099  @MapFeature.Require(ALLOWS_NULL_KEYS)
100  @CollectionSize.Require(absent = ZERO)
101  public void testGetOrDefault_presentNull() {
102    initMapWithNullKey();
103    assertEquals(
104        "getOrDefault(null, default) should return the associated value",
105        getValueForNullKey(),
106        getMap().getOrDefault(null, v3()));
107  }
108
109  @MapFeature.Require(ALLOWS_NULL_VALUES)
110  @CollectionSize.Require(absent = ZERO)
111  public void testGetOrDefault_presentMappedToNull() {
112    initMapWithNullValue();
113    assertNull(
114        "getOrDefault(mappedToNull, default) should return null",
115        getMap().getOrDefault(getKeyForNullValue(), v3()));
116  }
117
118  public void testGet_wrongType() {
119    try {
120      assertEquals(
121          "getOrDefault(wrongType, default) should return default or throw",
122          v3(),
123          getMap().getOrDefault(WrongType.VALUE, v3()));
124    } catch (ClassCastException tolerated) {
125    }
126  }
127}