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.CollectionFeature.ALLOWS_NULL_VALUES;
20import static com.google.common.collect.testing.features.CollectionFeature.KNOWN_ORDER;
21import static com.google.common.collect.testing.features.CollectionFeature.NON_STANDARD_TOSTRING;
22import static com.google.common.collect.testing.features.CollectionSize.ONE;
23import static com.google.common.collect.testing.features.CollectionSize.SEVERAL;
24import static com.google.common.collect.testing.features.CollectionSize.ZERO;
25
26import com.google.common.annotations.GwtCompatible;
27import com.google.common.collect.testing.AbstractCollectionTester;
28import com.google.common.collect.testing.Helpers;
29import com.google.common.collect.testing.features.CollectionFeature;
30import com.google.common.collect.testing.features.CollectionSize;
31
32/**
33 * A generic JUnit test which tests {@code toString()} operations on a
34 * collection. Can't be invoked directly; please see
35 * {@link com.google.common.collect.testing.CollectionTestSuiteBuilder}.
36 *
37 * @author Kevin Bourrillion
38 */
39@GwtCompatible
40public class CollectionToStringTester<E> extends AbstractCollectionTester<E> {
41  public void testToString_minimal() {
42    assertNotNull("toString() should not return null",
43        collection.toString());
44  }
45
46  @CollectionSize.Require(ZERO)
47  @CollectionFeature.Require(absent = NON_STANDARD_TOSTRING)
48  public void testToString_size0() {
49    assertEquals("emptyCollection.toString should return []", "[]",
50        collection.toString());
51  }
52
53  @CollectionSize.Require(ONE)
54  @CollectionFeature.Require(absent = NON_STANDARD_TOSTRING)
55  public void testToString_size1() {
56    assertEquals("size1Collection.toString should return [{element}]",
57        "[" + samples.e0 + "]", collection.toString());
58  }
59
60  @CollectionSize.Require(SEVERAL)
61  @CollectionFeature.Require(
62      value = KNOWN_ORDER, absent = NON_STANDARD_TOSTRING)
63  public void testToString_sizeSeveral() {
64    String expected = Helpers.copyToList(getOrderedElements()).toString();
65    assertEquals("collection.toString() incorrect",
66        expected, collection.toString());
67  }
68
69  @CollectionSize.Require(absent = ZERO)
70  @CollectionFeature.Require(ALLOWS_NULL_VALUES)
71  public void testToString_null() {
72    initCollectionWithNullElement();
73    testToString_minimal();
74  }
75}
76