guava
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1/*
2* Copyright (C) 2007 The Guava Authors
3*
4* Licensed under the Apache License, Version 2.0 (the "License");
5* you may not use this file except in compliance with the License.
6* You may obtain a copy of the License at
7*
8* http://www.apache.org/licenses/LICENSE-2.0
9*
10* Unless required by applicable law or agreed to in writing, software
11* distributed under the License is distributed on an "AS IS" BASIS,
12* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13* See the License for the specific language governing permissions and
14* limitations under the License.
15*/
16
17package com.google.common.collect.testing.testers;
18
19import static com.google.common.collect.testing.features.CollectionSize.ZERO;
20import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEYS;
21import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEY_QUERIES;
22
23import com.google.common.annotations.GwtCompatible;
24import com.google.common.collect.testing.AbstractMapTester;
25import com.google.common.collect.testing.WrongType;
26import com.google.common.collect.testing.features.CollectionSize;
27import com.google.common.collect.testing.features.MapFeature;
28import org.junit.Ignore;
29
30/**
31* A generic JUnit test which tests {@code get} operations on a map. Can't be invoked directly;
32* please see {@link com.google.common.collect.testing.MapTestSuiteBuilder}.
33*
34* @author Kevin Bourrillion
35* @author Chris Povirk
36*/
37@GwtCompatible
38@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
39public class MapGetTester<K, V> extends AbstractMapTester<K, V> {
40@CollectionSize.Require(absent = ZERO)
41public void testGet_yes() {
42assertEquals("get(present) should return the associated value", v0(), get(k0()));
43}
44
45public void testGet_no() {
46assertNull("get(notPresent) should return null", get(k3()));
47}
48
49@MapFeature.Require(ALLOWS_NULL_KEY_QUERIES)
50public void testGet_nullNotContainedButAllowed() {
51assertNull("get(null) should return null", get(null));
52}
53
54@MapFeature.Require(absent = ALLOWS_NULL_KEY_QUERIES)
55public void testGet_nullNotContainedAndUnsupported() {
56try {
57assertNull("get(null) should return null or throw", get(null));
58} catch (NullPointerException tolerated) {
59}
60}
61
62@MapFeature.Require(ALLOWS_NULL_KEYS)
63@CollectionSize.Require(absent = ZERO)
64public void testGet_nonNullWhenNullContained() {
65initMapWithNullKey();
66assertNull("get(notPresent) should return null", get(k3()));
67}
68
69@MapFeature.Require(ALLOWS_NULL_KEYS)
70@CollectionSize.Require(absent = ZERO)
71public void testGet_nullContained() {
72initMapWithNullKey();
73assertEquals("get(null) should return the associated value", getValueForNullKey(), get(null));
74}
75
76public void testGet_wrongType() {
77try {
78assertNull("get(wrongType) should return null or throw", getMap().get(WrongType.VALUE));
79} catch (ClassCastException tolerated) {
80}
81}
82}
83