1/*
2 * Copyright (C) 2008 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.CollectionFeature.ALLOWS_NULL_VALUES;
20import static com.google.common.collect.testing.features.CollectionSize.ZERO;
21
22import com.google.common.collect.testing.AbstractCollectionTester;
23import com.google.common.collect.testing.features.CollectionFeature;
24import com.google.common.collect.testing.features.CollectionSize;
25
26import java.lang.reflect.Method;
27
28/**
29 * A generic JUnit test which tests creation (typically through a constructor or
30 * static factory method) of a collection. Can't be invoked directly; please see
31 * {@link com.google.common.collect.testing.CollectionTestSuiteBuilder}.
32 *
33 * <p>This class is GWT compatible.
34 *
35 * @author Chris Povirk
36 */
37public class CollectionCreationTester<E> extends AbstractCollectionTester<E> {
38  @CollectionFeature.Require(ALLOWS_NULL_VALUES)
39  @CollectionSize.Require(absent = ZERO)
40  public void testCreateWithNull_supported() {
41    E[] array = createArrayWithNullElement();
42    collection = getSubjectGenerator().create(array);
43    expectContents(array);
44  }
45
46  @CollectionFeature.Require(absent = ALLOWS_NULL_VALUES)
47  @CollectionSize.Require(absent = ZERO)
48  public void testCreateWithNull_unsupported() {
49    E[] array = createArrayWithNullElement();
50
51    try {
52      getSubjectGenerator().create(array);
53      fail("Creating a collection containing null should fail");
54    } catch (NullPointerException expected) {
55    }
56  }
57
58  /**
59   * Returns the {@link Method} instance for {@link
60   * #testCreateWithNull_unsupported()} so that tests can suppress it
61   * with {@code FeatureSpecificTestSuiteBuilder.suppressing()} until <a
62   * href="http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=5045147">Sun
63   * bug 5045147</a> is fixed.
64   */
65  public static Method getCreateWithNullUnsupportedMethod() {
66    return Platform.getMethod(CollectionCreationTester.class, "testCreateWithNull_unsupported");
67  }
68}
69