1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.commons.lang3.stream;
import static org.junit.jupiter.api.Assertions.assertEquals;
import java.util.Objects;
import java.util.concurrent.atomic.AtomicLong;
import java.util.function.Function;
import java.util.stream.Collector;
import java.util.stream.Stream;
import org.junit.jupiter.api.Test;
/**
* Tests {@link LangCollectors}
*/
public class LangCollectorsTest {
private static class Fixture {
int value;
private Fixture(final int value) {
this.value = value;
}
@Override
public String toString() {
return Integer.toString(value);
}
}
private static final Long _1L = Long.valueOf(1);
private static final Long _2L = Long.valueOf(2);
private static final Long _3L = Long.valueOf(3);
private static final Function<Object, String> TO_STRING = Objects::toString;
private static final Collector<Object, ?, String> JOINING_0 = LangCollectors.joining();
private static final Collector<Object, ?, String> JOINING_1 = LangCollectors.joining("-");
private static final Collector<Object, ?, String> JOINING_3 = LangCollectors.joining("-", "<", ">");
private static final Collector<Object, ?, String> JOINING_4 = LangCollectors.joining("-", "<", ">", TO_STRING);
private static final Collector<Object, ?, String> JOINING_4_NUL = LangCollectors.joining("-", "<", ">", o -> Objects.toString(o, "NUL"));
@Test
public void testJoiningNonStrings0Arg() {
assertEquals("", Stream.of().collect(JOINING_0));
assertEquals("1", Stream.of(_1L).collect(JOINING_0));
assertEquals("12", Stream.of(_1L, _2L).collect(JOINING_0));
assertEquals("123", Stream.of(_1L, _2L, _3L).collect(JOINING_0));
assertEquals("1null3", Stream.of(_1L, null, _3L).collect(JOINING_0));
assertEquals("12", Stream.of(new AtomicLong(1), new AtomicLong(2)).collect(JOINING_0));
assertEquals("12", Stream.of(new Fixture(1), new Fixture(2)).collect(JOINING_0));
}
@Test
public void testJoiningNonStrings1Arg() {
assertEquals("", Stream.of().collect(JOINING_1));
assertEquals("1", Stream.of(_1L).collect(JOINING_1));
assertEquals("1-2", Stream.of(_1L, _2L).collect(JOINING_1));
assertEquals("1-2-3", Stream.of(_1L, _2L, _3L).collect(JOINING_1));
assertEquals("1-null-3", Stream.of(_1L, null, _3L).collect(JOINING_1));
assertEquals("1-2", Stream.of(new AtomicLong(1), new AtomicLong(2)).collect(JOINING_1));
assertEquals("1-2", Stream.of(new Fixture(1), new Fixture(2)).collect(JOINING_1));
}
@Test
public void testJoiningNonStrings3Args() {
assertEquals("<>", Stream.of().collect(JOINING_3));
assertEquals("<1>", Stream.of(_1L).collect(JOINING_3));
assertEquals("<1-2>", Stream.of(_1L, _2L).collect(JOINING_3));
assertEquals("<1-2-3>", Stream.of(_1L, _2L, _3L).collect(JOINING_3));
assertEquals("<1-null-3>", Stream.of(_1L, null, _3L).collect(JOINING_3));
assertEquals("<1-2>", Stream.of(new AtomicLong(1), new AtomicLong(2)).collect(JOINING_3));
assertEquals("<1-2>", Stream.of(new Fixture(1), new Fixture(2)).collect(JOINING_3));
}
@Test
public void testJoiningNonStrings4Args() {
assertEquals("<>", Stream.of().collect(JOINING_4));
assertEquals("<1>", Stream.of(_1L).collect(JOINING_4));
assertEquals("<1-2>", Stream.of(_1L, _2L).collect(JOINING_4));
assertEquals("<1-2-3>", Stream.of(_1L, _2L, _3L).collect(JOINING_4));
assertEquals("<1-null-3>", Stream.of(_1L, null, _3L).collect(JOINING_4));
assertEquals("<1-NUL-3>", Stream.of(_1L, null, _3L).collect(JOINING_4_NUL));
assertEquals("<1-2>", Stream.of(new AtomicLong(1), new AtomicLong(2)).collect(JOINING_4));
assertEquals("<1-2>", Stream.of(new Fixture(1), new Fixture(2)).collect(JOINING_4));
}
@Test
public void testJoiningStrings0Arg() {
assertEquals("", Stream.of().collect(JOINING_0));
assertEquals("1", Stream.of("1").collect(JOINING_0));
assertEquals("12", Stream.of("1", "2").collect(JOINING_0));
assertEquals("123", Stream.of("1", "2", "3").collect(JOINING_0));
assertEquals("1null3", Stream.of("1", null, "3").collect(JOINING_0));
}
@Test
public void testJoiningStrings1Arg() {
assertEquals("", Stream.of().collect(JOINING_1));
assertEquals("1", Stream.of("1").collect(JOINING_1));
assertEquals("1-2", Stream.of("1", "2").collect(JOINING_1));
assertEquals("1-2-3", Stream.of("1", "2", "3").collect(JOINING_1));
assertEquals("1-null-3", Stream.of("1", null, "3").collect(JOINING_1));
}
@Test
public void testJoiningStrings3Args() {
assertEquals("<>", Stream.of().collect(JOINING_3));
assertEquals("<1>", Stream.of("1").collect(JOINING_3));
assertEquals("<1-2>", Stream.of("1", "2").collect(JOINING_3));
assertEquals("<1-2-3>", Stream.of("1", "2", "3").collect(JOINING_3));
assertEquals("<1-null-3>", Stream.of("1", null, "3").collect(JOINING_3));
}
@Test
public void testJoiningStrings4Args() {
assertEquals("<>", Stream.of().collect(JOINING_4));
assertEquals("<1>", Stream.of("1").collect(JOINING_4));
assertEquals("<1-2>", Stream.of("1", "2").collect(JOINING_4));
assertEquals("<1-2-3>", Stream.of("1", "2", "3").collect(JOINING_4));
assertEquals("<1-null-3>", Stream.of("1", null, "3").collect(JOINING_4));
assertEquals("<1-NUL-3>", Stream.of("1", null, "3").collect(JOINING_4_NUL));
}
}
|
