Java
84 строки · 2.7 Кб
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;
18
19import com.google.common.annotations.GwtCompatible;
20import com.google.errorprone.annotations.CanIgnoreReturnValue;
21import java.util.Collection;
22import org.checkerframework.checker.nullness.qual.Nullable;
23import org.junit.Ignore;
24
25/**
26* Base class for collection testers.
27*
28* @param <E> the element type of the collection to be tested.
29* @author Kevin Bourrillion
30*/
31@GwtCompatible
32@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
33@SuppressWarnings("JUnit4ClassUsedInJUnit3")
34@ElementTypesAreNonnullByDefault
35public abstract class AbstractCollectionTester<E extends @Nullable Object>
36extends AbstractContainerTester<Collection<E>, E> {
37
38// TODO: replace this with an accessor.
39protected Collection<E> collection;
40
41@Override
42protected Collection<E> actualContents() {
43return collection;
44}
45
46// TODO: dispose of this once collection is encapsulated.
47@Override
48@CanIgnoreReturnValue
49protected Collection<E> resetContainer(Collection<E> newContents) {
50collection = super.resetContainer(newContents);
51return collection;
52}
53
54/** @see AbstractContainerTester#resetContainer() */
55protected void resetCollection() {
56resetContainer();
57}
58
59/** @return an array of the proper size with {@code null} inserted into the middle element. */
60protected E[] createArrayWithNullElement() {
61E[] array = createSamplesArray();
62array[getNullLocation()] = null;
63return array;
64}
65
66protected void initCollectionWithNullElement() {
67E[] array = createArrayWithNullElement();
68resetContainer(getSubjectGenerator().create(array));
69}
70
71/**
72* Equivalent to {@link #expectMissing(Object[]) expectMissing}{@code (null)} except that the call
73* to {@code contains(null)} is permitted to throw a {@code NullPointerException}.
74*
75* @param message message to use upon assertion failure
76*/
77protected void expectNullMissingWhenNullUnsupported(String message) {
78try {
79assertFalse(message, actualContents().contains(null));
80} catch (NullPointerException tolerated) {
81// Tolerated
82}
83}
84}
85