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GraphAdapterBuilderTest.java
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GraphAdapterBuilderTest.java
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/*
* Copyright (C) 2011 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.graph;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertSame;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.reflect.TypeToken;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.junit.jupiter.api.Test;
class GraphAdapterBuilderTest {
@Test
void testSerialization() {
Roshambo rock = new Roshambo("ROCK");
Roshambo scissors = new Roshambo("SCISSORS");
Roshambo paper = new Roshambo("PAPER");
rock.beats = scissors;
scissors.beats = paper;
paper.beats = rock;
GsonBuilder gsonBuilder = new GsonBuilder();
new GraphAdapterBuilder()
.addType(Roshambo.class)
.registerOn(gsonBuilder);
Gson gson = gsonBuilder.create();
assertEquals("{'0x1':{'name':'ROCK','beats':'0x2'}," +
"'0x2':{'name':'SCISSORS','beats':'0x3'}," +
"'0x3':{'name':'PAPER','beats':'0x1'}}",
gson.toJson(rock).replace('"', '\''));
}
@Test
void testDeserialization() {
String json = "{'0x1':{'name':'ROCK','beats':'0x2'}," +
"'0x2':{'name':'SCISSORS','beats':'0x3'}," +
"'0x3':{'name':'PAPER','beats':'0x1'}}";
GsonBuilder gsonBuilder = new GsonBuilder();
new GraphAdapterBuilder()
.addType(Roshambo.class)
.registerOn(gsonBuilder);
Gson gson = gsonBuilder.create();
Roshambo rock = gson.fromJson(json, Roshambo.class);
assertEquals("ROCK", rock.name);
Roshambo scissors = rock.beats;
assertEquals("SCISSORS", scissors.name);
Roshambo paper = scissors.beats;
assertEquals("PAPER", paper.name);
assertSame(rock, paper.beats);
}
@Test
void testDeserializationDirectSelfReference() {
String json = "{'0x1':{'name':'SUICIDE','beats':'0x1'}}";
GsonBuilder gsonBuilder = new GsonBuilder();
new GraphAdapterBuilder()
.addType(Roshambo.class)
.registerOn(gsonBuilder);
Gson gson = gsonBuilder.create();
Roshambo suicide = gson.fromJson(json, Roshambo.class);
assertEquals("SUICIDE", suicide.name);
assertSame(suicide, suicide.beats);
}
@Test
void testSerializeListOfLists() {
Type listOfListsType = new TypeToken<List<List<?>>>() {}.getType();
Type listOfAnyType = new TypeToken<List<?>>() {}.getType();
List<List<?>> listOfLists = new ArrayList<List<?>>();
listOfLists.add(listOfLists);
listOfLists.add(new ArrayList<Object>());
GsonBuilder gsonBuilder = new GsonBuilder();
new GraphAdapterBuilder()
.addType(listOfListsType)
.addType(listOfAnyType)
.registerOn(gsonBuilder);
Gson gson = gsonBuilder.create();
String json = gson.toJson(listOfLists, listOfListsType);
assertEquals("{'0x1':['0x1','0x2'],'0x2':[]}", json.replace('"', '\''));
}
@Test
void testDeserializeListOfLists() {
Type listOfAnyType = new TypeToken<List<?>>() {}.getType();
Type listOfListsType = new TypeToken<List<List<?>>>() {}.getType();
GsonBuilder gsonBuilder = new GsonBuilder();
new GraphAdapterBuilder()
.addType(listOfListsType)
.addType(listOfAnyType)
.registerOn(gsonBuilder);
Gson gson = gsonBuilder.create();
List<List<?>> listOfLists = gson.fromJson("{'0x1':['0x1','0x2'],'0x2':[]}", listOfListsType);
assertEquals(2, listOfLists.size());
assertSame(listOfLists, listOfLists.get(0));
assertEquals(Collections.emptyList(), listOfLists.get(1));
}
@Test
void testSerializationWithMultipleTypes() {
Company google = new Company("Google");
new Employee("Jesse", google);
new Employee("Joel", google);
GsonBuilder gsonBuilder = new GsonBuilder();
new GraphAdapterBuilder()
.addType(Company.class)
.addType(Employee.class)
.registerOn(gsonBuilder);
Gson gson = gsonBuilder.create();
assertEquals("{'0x1':{'name':'Google','employees':['0x2','0x3']},"
+ "'0x2':{'name':'Jesse','company':'0x1'},"
+ "'0x3':{'name':'Joel','company':'0x1'}}",
gson.toJson(google).replace('"', '\''));
}
@Test
void testDeserializationWithMultipleTypes() {
GsonBuilder gsonBuilder = new GsonBuilder();
new GraphAdapterBuilder()
.addType(Company.class)
.addType(Employee.class)
.registerOn(gsonBuilder);
Gson gson = gsonBuilder.create();
String json = "{'0x1':{'name':'Google','employees':['0x2','0x3']},"
+ "'0x2':{'name':'Jesse','company':'0x1'},"
+ "'0x3':{'name':'Joel','company':'0x1'}}";
Company company = gson.fromJson(json, Company.class);
assertEquals("Google", company.name);
Employee jesse = company.employees.get(0);
assertEquals("Jesse", jesse.name);
assertEquals(company, jesse.company);
Employee joel = company.employees.get(1);
assertEquals("Joel", joel.name);
assertEquals(company, joel.company);
}
static class Roshambo {
String name;
Roshambo beats;
Roshambo(String name) {
this.name = name;
}
}
static class Employee {
final String name;
final Company company;
Employee(String name, Company company) {
this.name = name;
this.company = company;
this.company.employees.add(this);
}
}
static class Company {
final String name;
final List<Employee> employees = new ArrayList<Employee>();
Company(String name) {
this.name = name;
}
}
}