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/*
* 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.FieldNamingPolicy;
import com.google.gson.FieldNamingStrategy;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.annotations.SerializedName;
import com.google.gson.common.TestTypes.ClassWithSerializedNameFields;
import com.google.gson.common.TestTypes.StringWrapper;
import junit.framework.TestCase;
import java.lang.reflect.Field;
/**
* Functional tests for naming policies.
*
* @author Inderjeet Singh
* @author Joel Leitch
*/
public class NamingPolicyTest extends TestCase {
private GsonBuilder builder;
@Override
protected void setUp() throws Exception {
super.setUp();
builder = new GsonBuilder();
}
public void testGsonWithNonDefaultFieldNamingPolicySerialization() {
Gson gson = builder.setFieldNamingPolicy(FieldNamingPolicy.UPPER_CAMEL_CASE).create();
StringWrapper target = new StringWrapper("blah");
assertEquals("{\"SomeConstantStringInstanceField\":\""
+ target.someConstantStringInstanceField + "\"}", gson.toJson(target));
}
public void testGsonWithNonDefaultFieldNamingPolicyDeserialiation() {
Gson gson = builder.setFieldNamingPolicy(FieldNamingPolicy.UPPER_CAMEL_CASE).create();
String target = "{\"SomeConstantStringInstanceField\":\"someValue\"}";
StringWrapper deserializedObject = gson.fromJson(target, StringWrapper.class);
assertEquals("someValue", deserializedObject.someConstantStringInstanceField);
}
public void testGsonWithLowerCaseDashPolicySerialization() {
Gson gson = builder.setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_DASHES).create();
StringWrapper target = new StringWrapper("blah");
assertEquals("{\"some-constant-string-instance-field\":\""
+ target.someConstantStringInstanceField + "\"}", gson.toJson(target));
}
public void testGsonWithLowerCaseDashPolicyDeserialiation() {
Gson gson = builder.setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_DASHES).create();
String target = "{\"some-constant-string-instance-field\":\"someValue\"}";
StringWrapper deserializedObject = gson.fromJson(target, StringWrapper.class);
assertEquals("someValue", deserializedObject.someConstantStringInstanceField);
}
public void testGsonWithLowerCaseUnderscorePolicySerialization() {
Gson gson = builder.setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_UNDERSCORES)
.create();
StringWrapper target = new StringWrapper("blah");
assertEquals("{\"some_constant_string_instance_field\":\""
+ target.someConstantStringInstanceField + "\"}", gson.toJson(target));
}
public void testGsonWithLowerCaseUnderscorePolicyDeserialiation() {
Gson gson = builder.setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_UNDERSCORES)
.create();
String target = "{\"some_constant_string_instance_field\":\"someValue\"}";
StringWrapper deserializedObject = gson.fromJson(target, StringWrapper.class);
assertEquals("someValue", deserializedObject.someConstantStringInstanceField);
}
public void testGsonWithSerializedNameFieldNamingPolicySerialization() {
Gson gson = builder.create();
ClassWithSerializedNameFields expected = new ClassWithSerializedNameFields(5, 6);
String actual = gson.toJson(expected);
assertEquals(expected.getExpectedJson(), actual);
}
public void testGsonWithSerializedNameFieldNamingPolicyDeserialization() {
Gson gson = builder.create();
ClassWithSerializedNameFields expected = new ClassWithSerializedNameFields(5, 7);
ClassWithSerializedNameFields actual =
gson.fromJson(expected.getExpectedJson(), ClassWithSerializedNameFields.class);
assertEquals(expected.f, actual.f);
}
public void testGsonDuplicateNameUsingSerializedNameFieldNamingPolicySerialization() {
Gson gson = builder.create();
try {
ClassWithDuplicateFields target = new ClassWithDuplicateFields(10);
gson.toJson(target);
fail();
} catch (IllegalArgumentException expected) {
}
}
public void testGsonWithUpperCamelCaseSpacesPolicySerialiation() {
Gson gson = builder.setFieldNamingPolicy(FieldNamingPolicy.UPPER_CAMEL_CASE_WITH_SPACES)
.create();
StringWrapper target = new StringWrapper("blah");
assertEquals("{\"Some Constant String Instance Field\":\""
+ target.someConstantStringInstanceField + "\"}", gson.toJson(target));
}
public void testGsonWithUpperCamelCaseSpacesPolicyDeserialiation() {
Gson gson = builder.setFieldNamingPolicy(FieldNamingPolicy.UPPER_CAMEL_CASE_WITH_SPACES)
.create();
String target = "{\"Some Constant String Instance Field\":\"someValue\"}";
StringWrapper deserializedObject = gson.fromJson(target, StringWrapper.class);
assertEquals("someValue", deserializedObject.someConstantStringInstanceField);
}
public void testDeprecatedNamingStrategy() throws Exception {
Gson gson = builder.setFieldNamingStrategy(new UpperCaseNamingStrategy()).create();
ClassWithDuplicateFields target = new ClassWithDuplicateFields(10);
String actual = gson.toJson(target);
assertEquals("{\"A\":10}", actual);
}
public void testComplexFieldNameStrategy() throws Exception {
Gson gson = new Gson();
String json = gson.toJson(new ClassWithComplexFieldName(10));
String escapedFieldName = "@value\\\"_s$\\\\";
assertEquals("{\"" + escapedFieldName + "\":10}", json);
ClassWithComplexFieldName obj = gson.fromJson(json, ClassWithComplexFieldName.class);
assertEquals(10, obj.value);
}
/** http://code.google.com/p/google-gson/issues/detail?id=349 */
public void testAtSignInSerializedName() {
assertEquals("{\"@foo\":\"bar\"}", new Gson().toJson(new AtName()));
}
static class AtName {
@SerializedName("@foo") String f = "bar";
}
private static class UpperCaseNamingStrategy implements FieldNamingStrategy {
public String translateName(Field f) {
return f.getName().toUpperCase();
}
}
@SuppressWarnings("unused")
private static class ClassWithDuplicateFields {
public Integer a;
@SerializedName("a") public Double b;
public ClassWithDuplicateFields(Integer a) {
this(a, null);
}
public ClassWithDuplicateFields(Double b) {
this(null, b);
}
public ClassWithDuplicateFields(Integer a, Double b) {
this.a = a;
this.b = b;
}
}
private static class ClassWithComplexFieldName {
@SerializedName("@value\"_s$\\") public final long value;
ClassWithComplexFieldName(long value) {
this.value = value;
}
}
}
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