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.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;
022
023import com.google.common.annotations.GwtCompatible;
024import com.google.common.collect.testing.AbstractMapTester;
025import com.google.common.collect.testing.WrongType;
026import com.google.common.collect.testing.features.CollectionSize;
027import com.google.common.collect.testing.features.MapFeature;
028import org.junit.Ignore;
029
030/**
031 * A generic JUnit test which tests {@code get} operations on a map. Can't be invoked directly;
032 * please see {@link com.google.common.collect.testing.MapTestSuiteBuilder}.
033 *
034 * @author Kevin Bourrillion
035 * @author Chris Povirk
036 */
037@GwtCompatible
038@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
039@SuppressWarnings("JUnit4ClassUsedInJUnit3")
040public class MapGetTester<K, V> extends AbstractMapTester<K, V> {
041  @CollectionSize.Require(absent = ZERO)
042  public void testGet_yes() {
043    assertEquals("get(present) should return the associated value", v0(), get(k0()));
044  }
045
046  public void testGet_no() {
047    assertNull("get(notPresent) should return null", get(k3()));
048  }
049
050  @MapFeature.Require(ALLOWS_NULL_KEY_QUERIES)
051  public void testGet_nullNotContainedButAllowed() {
052    assertNull("get(null) should return null", get(null));
053  }
054
055  @MapFeature.Require(absent = ALLOWS_NULL_KEY_QUERIES)
056  public void testGet_nullNotContainedAndUnsupported() {
057    try {
058      assertNull("get(null) should return null or throw", get(null));
059    } catch (NullPointerException tolerated) {
060    }
061  }
062
063  @MapFeature.Require(ALLOWS_NULL_KEYS)
064  @CollectionSize.Require(absent = ZERO)
065  public void testGet_nonNullWhenNullContained() {
066    initMapWithNullKey();
067    assertNull("get(notPresent) should return null", get(k3()));
068  }
069
070  @MapFeature.Require(ALLOWS_NULL_KEYS)
071  @CollectionSize.Require(absent = ZERO)
072  public void testGet_nullContained() {
073    initMapWithNullKey();
074    assertEquals("get(null) should return the associated value", getValueForNullKey(), get(null));
075  }
076
077  public void testGet_wrongType() {
078    try {
079      assertNull("get(wrongType) should return null or throw", getMap().get(WrongType.VALUE));
080    } catch (ClassCastException tolerated) {
081    }
082  }
083}