forked from OpenFeign/feign
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathUtilTest.java
More file actions
128 lines (110 loc) · 4.88 KB
/
UtilTest.java
File metadata and controls
128 lines (110 loc) · 4.88 KB
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
/**
* Copyright 2012-2018 The Feign Authors
*
* 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 feign;
import org.junit.Test;
import java.io.Reader;
import java.lang.reflect.Type;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import feign.codec.Decoder;
import static feign.Util.resolveLastTypeParameter;
import static org.assertj.core.api.Assertions.assertThat;
import static org.junit.Assert.assertEquals;
public class UtilTest {
@Test
public void emptyValueOf() throws Exception {
assertEquals(false, Util.emptyValueOf(boolean.class));
assertEquals(false, Util.emptyValueOf(Boolean.class));
assertThat((byte[]) Util.emptyValueOf(byte[].class)).isEmpty();
assertEquals(Collections.emptyList(), Util.emptyValueOf(Collection.class));
assertThat((Iterator<?>) Util.emptyValueOf(Iterator.class)).isEmpty();
assertEquals(Collections.emptyList(), Util.emptyValueOf(List.class));
assertEquals(Collections.emptyMap(), Util.emptyValueOf(Map.class));
assertEquals(Collections.emptySet(), Util.emptyValueOf(Set.class));
}
/** In other words, {@code List<String>} is as empty as {@code List<?>}. */
@Test
public void emptyValueOf_considersRawType() throws Exception {
Type listStringType = LastTypeParameter.class.getDeclaredField("LIST_STRING").getGenericType();
assertThat((List<?>) Util.emptyValueOf(listStringType)).isEmpty();
}
/** Ex. your {@code Foo} object would be null, but so would things like Number. */
@Test
public void emptyValueOf_nullForUndefined() throws Exception {
assertThat(Util.emptyValueOf(Number.class)).isNull();
assertThat(Util.emptyValueOf(Parameterized.class)).isNull();
}
@Test
public void resolveLastTypeParameterWhenNotSubtype() throws Exception {
Type context =
LastTypeParameter.class.getDeclaredField("PARAMETERIZED_LIST_STRING").getGenericType();
Type listStringType = LastTypeParameter.class.getDeclaredField("LIST_STRING").getGenericType();
Type last = resolveLastTypeParameter(context, Parameterized.class);
assertEquals(listStringType, last);
}
@Test
public void lastTypeFromInstance() throws Exception {
Parameterized<?> instance = new ParameterizedSubtype();
Type last = resolveLastTypeParameter(instance.getClass(), Parameterized.class);
assertEquals(String.class, last);
}
@Test
public void lastTypeFromAnonymous() throws Exception {
Parameterized<?> instance = new Parameterized<Reader>() {};
Type last = resolveLastTypeParameter(instance.getClass(), Parameterized.class);
assertEquals(Reader.class, last);
}
@Test
public void resolveLastTypeParameterWhenWildcard() throws Exception {
Type context =
LastTypeParameter.class.getDeclaredField("PARAMETERIZED_WILDCARD_LIST_STRING")
.getGenericType();
Type listStringType = LastTypeParameter.class.getDeclaredField("LIST_STRING").getGenericType();
Type last = resolveLastTypeParameter(context, Parameterized.class);
assertEquals(listStringType, last);
}
@Test
public void resolveLastTypeParameterWhenParameterizedSubtype() throws Exception {
Type context =
LastTypeParameter.class.getDeclaredField("PARAMETERIZED_DECODER_LIST_STRING")
.getGenericType();
Type listStringType = LastTypeParameter.class.getDeclaredField("LIST_STRING").getGenericType();
Type last = resolveLastTypeParameter(context, ParameterizedDecoder.class);
assertEquals(listStringType, last);
}
@Test
public void unboundWildcardIsObject() throws Exception {
Type context =
LastTypeParameter.class.getDeclaredField("PARAMETERIZED_DECODER_UNBOUND").getGenericType();
Type last = resolveLastTypeParameter(context, ParameterizedDecoder.class);
assertEquals(Object.class, last);
}
interface LastTypeParameter {
final List<String> LIST_STRING = null;
final Parameterized<List<String>> PARAMETERIZED_LIST_STRING = null;
final Parameterized<? extends List<String>> PARAMETERIZED_WILDCARD_LIST_STRING = null;
final ParameterizedDecoder<List<String>> PARAMETERIZED_DECODER_LIST_STRING = null;
final ParameterizedDecoder<?> PARAMETERIZED_DECODER_UNBOUND = null;
}
interface ParameterizedDecoder<T extends List<String>> extends Decoder {
}
interface Parameterized<T> {
}
static class ParameterizedSubtype implements Parameterized<String> {
}
}