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
|
/*
* Copyright 2000-2018 Vaadin Ltd.
*
* Licensed 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 com.vaadin.data;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import org.junit.Test;
import com.vaadin.server.SerializableFunction;
/**
* @author Vaadin Ltd
*
*/
public class ResultTest {
@Test
public void testOk() {
String value = "foo";
Result<String> ok = Result.ok(value);
assertFalse(ok.isError());
assertFalse(ok.getMessage().isPresent());
ok.ifOk(v -> assertEquals(value, v));
ok.ifError(msg -> fail());
}
@Test
public void testError() {
String message = "foo";
Result<String> error = Result.error(message);
assertTrue(error.isError());
assertTrue(error.getMessage().isPresent());
error.ifOk(v -> fail());
error.ifError(msg -> assertEquals(message, msg));
assertEquals(message, error.getMessage().get());
}
@Test
public void of_noException() {
Result<String> result = Result.of(() -> "", exception -> null);
assertTrue(result instanceof SimpleResult);
assertFalse(result.isError());
}
@Test
public void of_exception() {
String message = "foo";
Result<String> result = Result.of(() -> {
throw new RuntimeException();
}, exception -> message);
assertTrue(result instanceof SimpleResult);
assertTrue(result.isError());
assertEquals(message, result.getMessage().get());
}
@SuppressWarnings("serial")
@Test
public void map_norError_mapperIsApplied() {
Result<String> result = new SimpleResult<String>("foo", null) {
@Override
public <S> Result<S> flatMap(
SerializableFunction<String, Result<S>> mapper) {
return mapper.apply("foo");
}
};
Result<String> mapResult = result.map(value -> {
assertEquals("foo", value);
return "bar";
});
assertTrue(mapResult instanceof SimpleResult);
assertFalse(mapResult.isError());
mapResult.ifOk(v -> assertEquals("bar", v));
}
@SuppressWarnings("serial")
@Test
public void map_error_mapperIsApplied() {
Result<String> result = new SimpleResult<String>("foo", null) {
@Override
public <S> Result<S> flatMap(
SerializableFunction<String, Result<S>> mapper) {
return new SimpleResult<>(null, "bar");
}
};
Result<String> mapResult = result.map(value -> {
assertEquals("foo", value);
return "somevalue";
});
assertTrue(mapResult instanceof SimpleResult);
assertTrue(mapResult.isError());
mapResult.ifError(msg -> assertEquals("bar", msg));
}
}
|
