forked from google/gson
-
Notifications
You must be signed in to change notification settings - Fork 1
/
EnumTest.java
276 lines (236 loc) · 8.84 KB
/
EnumTest.java
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
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
/*
* Copyright (C) 2008 Google Inc.
*
* 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.google.gson.functional;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonParseException;
import com.google.gson.JsonPrimitive;
import com.google.gson.JsonSerializationContext;
import com.google.gson.JsonSerializer;
import com.google.gson.annotations.SerializedName;
import com.google.gson.common.MoreAsserts;
import com.google.gson.reflect.TypeToken;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.EnumMap;
import java.util.EnumSet;
import java.util.Map;
import java.util.Set;
import junit.framework.TestCase;
/**
* Functional tests for Java 5.0 enums.
*
* @author Inderjeet Singh
* @author Joel Leitch
*/
public class EnumTest extends TestCase {
private Gson gson;
@Override
protected void setUp() throws Exception {
super.setUp();
gson = new Gson();
}
public void testTopLevelEnumSerialization() throws Exception {
String result = gson.toJson(MyEnum.VALUE1);
assertEquals('"' + MyEnum.VALUE1.toString() + '"', result);
}
public void testTopLevelEnumDeserialization() throws Exception {
MyEnum result = gson.fromJson('"' + MyEnum.VALUE1.toString() + '"', MyEnum.class);
assertEquals(MyEnum.VALUE1, result);
}
public void testCollectionOfEnumsSerialization() {
Type type = new TypeToken<Collection<MyEnum>>() {}.getType();
Collection<MyEnum> target = new ArrayList<MyEnum>();
target.add(MyEnum.VALUE1);
target.add(MyEnum.VALUE2);
String expectedJson = "[\"VALUE1\",\"VALUE2\"]";
String actualJson = gson.toJson(target);
assertEquals(expectedJson, actualJson);
actualJson = gson.toJson(target, type);
assertEquals(expectedJson, actualJson);
}
public void testCollectionOfEnumsDeserialization() {
Type type = new TypeToken<Collection<MyEnum>>() {}.getType();
String json = "[\"VALUE1\",\"VALUE2\"]";
Collection<MyEnum> target = gson.fromJson(json, type);
MoreAsserts.assertContains(target, MyEnum.VALUE1);
MoreAsserts.assertContains(target, MyEnum.VALUE2);
}
public void testClassWithEnumFieldSerialization() throws Exception {
ClassWithEnumFields target = new ClassWithEnumFields();
assertEquals(target.getExpectedJson(), gson.toJson(target));
}
public void testClassWithEnumFieldDeserialization() throws Exception {
String json = "{value1:'VALUE1',value2:'VALUE2'}";
ClassWithEnumFields target = gson.fromJson(json, ClassWithEnumFields.class);
assertEquals(MyEnum.VALUE1,target.value1);
assertEquals(MyEnum.VALUE2,target.value2);
}
private static enum MyEnum {
VALUE1, VALUE2
}
private static class ClassWithEnumFields {
private final MyEnum value1 = MyEnum.VALUE1;
private final MyEnum value2 = MyEnum.VALUE2;
public String getExpectedJson() {
return "{\"value1\":\"" + value1 + "\",\"value2\":\"" + value2 + "\"}";
}
}
/**
* Test for issue 226.
*/
public void testEnumSubclass() {
assertFalse(Roshambo.class == Roshambo.ROCK.getClass());
assertEquals("\"ROCK\"", gson.toJson(Roshambo.ROCK));
assertEquals("[\"ROCK\",\"PAPER\",\"SCISSORS\"]", gson.toJson(EnumSet.allOf(Roshambo.class)));
assertEquals(Roshambo.ROCK, gson.fromJson("\"ROCK\"", Roshambo.class));
assertEquals(EnumSet.allOf(Roshambo.class),
gson.fromJson("[\"ROCK\",\"PAPER\",\"SCISSORS\"]", new TypeToken<Set<Roshambo>>() {}.getType()));
}
public void testEnumSubclassWithRegisteredTypeAdapter() {
gson = new GsonBuilder()
.registerTypeHierarchyAdapter(Roshambo.class, new MyEnumTypeAdapter())
.create();
assertFalse(Roshambo.class == Roshambo.ROCK.getClass());
assertEquals("\"123ROCK\"", gson.toJson(Roshambo.ROCK));
assertEquals("[\"123ROCK\",\"123PAPER\",\"123SCISSORS\"]", gson.toJson(EnumSet.allOf(Roshambo.class)));
assertEquals(Roshambo.ROCK, gson.fromJson("\"123ROCK\"", Roshambo.class));
assertEquals(EnumSet.allOf(Roshambo.class),
gson.fromJson("[\"123ROCK\",\"123PAPER\",\"123SCISSORS\"]", new TypeToken<Set<Roshambo>>() {}.getType()));
}
public void testEnumSubclassAsParameterizedType() {
Collection<Roshambo> list = new ArrayList<Roshambo>();
list.add(Roshambo.ROCK);
list.add(Roshambo.PAPER);
String json = gson.toJson(list);
assertEquals("[\"ROCK\",\"PAPER\"]", json);
Type collectionType = new TypeToken<Collection<Roshambo>>() {}.getType();
Collection<Roshambo> actualJsonList = gson.fromJson(json, collectionType);
MoreAsserts.assertContains(actualJsonList, Roshambo.ROCK);
MoreAsserts.assertContains(actualJsonList, Roshambo.PAPER);
}
public void testEnumCaseMapping() {
assertEquals(Gender.MALE, gson.fromJson("\"boy\"", Gender.class));
assertEquals("\"boy\"", gson.toJson(Gender.MALE, Gender.class));
}
public void testEnumSet() {
EnumSet<Roshambo> foo = EnumSet.of(Roshambo.ROCK, Roshambo.PAPER);
String json = gson.toJson(foo);
assertEquals("[\"ROCK\",\"PAPER\"]", json);
Type type = new TypeToken<EnumSet<Roshambo>>() {}.getType();
EnumSet<Roshambo> bar = gson.fromJson(json, type);
assertTrue(bar.contains(Roshambo.ROCK));
assertTrue(bar.contains(Roshambo.PAPER));
assertFalse(bar.contains(Roshambo.SCISSORS));
}
public void testEnumMap() throws Exception {
EnumMap<MyEnum, String> map = new EnumMap<MyEnum, String>(MyEnum.class);
map.put(MyEnum.VALUE1, "test");
String json = gson.toJson(map);
assertEquals("{\"VALUE1\":\"test\"}", json);
Type type = new TypeToken<EnumMap<MyEnum, String>>() {}.getType();
EnumMap<?, ?> actualMap = gson.fromJson("{\"VALUE1\":\"test\"}", type);
Map<?, ?> expectedMap = Collections.singletonMap(MyEnum.VALUE1, "test");
assertEquals(expectedMap, actualMap);
}
private enum Roshambo {
ROCK {
@Override Roshambo defeats() {
return SCISSORS;
}
},
PAPER {
@Override Roshambo defeats() {
return ROCK;
}
},
SCISSORS {
@Override Roshambo defeats() {
return PAPER;
}
};
abstract Roshambo defeats();
}
private static class MyEnumTypeAdapter
implements JsonSerializer<Roshambo>, JsonDeserializer<Roshambo> {
@Override public JsonElement serialize(Roshambo src, Type typeOfSrc, JsonSerializationContext context) {
return new JsonPrimitive("123" + src.name());
}
@Override public Roshambo deserialize(JsonElement json, Type classOfT, JsonDeserializationContext context)
throws JsonParseException {
return Roshambo.valueOf(json.getAsString().substring(3));
}
}
private enum Gender {
@SerializedName("boy")
MALE,
@SerializedName("girl")
FEMALE
}
public void testEnumClassWithFields() {
assertEquals("\"RED\"", gson.toJson(Color.RED));
assertEquals("red", gson.fromJson("RED", Color.class).value);
assertEquals(2, gson.fromJson("BLUE", Color.class).index);
}
private enum Color {
RED("red", 1), BLUE("blue", 2), GREEN("green", 3);
String value;
int index;
private Color(String value, int index) {
this.value = value;
this.index = index;
}
}
public void testEnumToStringRead() {
// Should still be able to read constant name
assertEquals(CustomToString.A, gson.fromJson("\"A\"", CustomToString.class));
// Should be able to read toString() value
assertEquals(CustomToString.A, gson.fromJson("\"test\"", CustomToString.class));
assertNull(gson.fromJson("\"other\"", CustomToString.class));
}
private enum CustomToString {
A;
@Override
public String toString() {
return "test";
}
}
/**
* Test that enum constant names have higher precedence than {@code toString()}
* result.
*/
public void testEnumToStringReadInterchanged() {
assertEquals(InterchangedToString.A, gson.fromJson("\"A\"", InterchangedToString.class));
assertEquals(InterchangedToString.B, gson.fromJson("\"B\"", InterchangedToString.class));
}
private enum InterchangedToString {
A("B"),
B("A");
private final String toString;
InterchangedToString(String toString) {
this.toString = toString;
}
@Override
public String toString() {
return toString;
}
}
}