/*
 * 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 java.lang.reflect.Type;
import java.util.LinkedHashMap;
import java.util.Map;

import junit.framework.TestCase;

import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;

/**
 * Functional test for Json serialization and deserialization for Maps
 *
 * @author Inderjeet Singh
 * @author Joel Leitch
 */
public class MapTest extends TestCase {
  private Gson gson;

  @Override
  protected void setUp() throws Exception {
    super.setUp();
    gson = new Gson();
  }

  public void testMapSerialization() {
    Map<String, Integer> map = new LinkedHashMap<String, Integer>();
    map.put("a", 1);
    map.put("b", 2);
    Type typeOfMap = new TypeToken<Map<String, Integer>>() {}.getType();
    String json = gson.toJson(map, typeOfMap);
    assertTrue(json.contains("\"a\":1"));
    assertTrue(json.contains("\"b\":2"));
  }

  public void testMapDeserialization() {
    String json = "{\"a\":1,\"b\":2}";
    Type typeOfMap = new TypeToken<Map<String,Integer>>(){}.getType();
    Map<String, Integer> target = gson.fromJson(json, typeOfMap);
    assertEquals(1, target.get("a").intValue());
    assertEquals(2, target.get("b").intValue());
  }

  @SuppressWarnings("unchecked")
  public void testRawMapSerialization() {
    Map map = new LinkedHashMap();
    map.put("a", 1);
    map.put("b", "string");
    String json = gson.toJson(map);
    assertTrue(json.contains("\"a\":1"));
    assertTrue(json.contains("\"b\":\"string\""));    
  }
  
  public void testMapSerializationEmpty() {
    Map<String, Integer> map = new LinkedHashMap<String, Integer>();
    Type typeOfMap = new TypeToken<Map<String, Integer>>() {}.getType();
    String json = gson.toJson(map, typeOfMap);
    assertEquals("{}", json);
  }
}