gson-comments/gson/src/test/java/com/google/gson/JsonObjectTest.java

/*
 * 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;

import junit.framework.TestCase;

/**
 * Unit test for the {@link JsonObject} class.
 *
 * @author Joel Leitch
 */
public class JsonObjectTest extends TestCase {

  public void testAddingAndRemovingObjectProperties() throws Exception {
    JsonObject jsonObj = new JsonObject();
    String propertyName = "property";
    assertFalse(jsonObj.has(propertyName));
    assertNull(jsonObj.get(propertyName));
    
    JsonPrimitive value = new JsonPrimitive("blah");
    jsonObj.add(propertyName, value);
    assertEquals(value, jsonObj.get(propertyName));
    
    JsonElement removedElement = jsonObj.remove(propertyName);
    assertEquals(value, removedElement);
    assertFalse(jsonObj.has(propertyName));
  }
  
  public void testAddingNullProperties() throws Exception {
    String propertyName = "property";
    JsonObject jsonObj = new JsonObject();
    jsonObj.add(propertyName, null);
    
    assertTrue(jsonObj.has(propertyName));
    
    JsonElement jsonElement = jsonObj.get(propertyName);
    assertNotNull(jsonElement);
    assertTrue(jsonElement.isJsonNull());
  }
  
  public void testAddingBooleanProperties() throws Exception {
    String propertyName = "property";
    JsonObject jsonObj = new JsonObject();
    jsonObj.addProperty(propertyName, true);
    
    assertTrue(jsonObj.has(propertyName));
    
    JsonElement jsonElement = jsonObj.get(propertyName);
    assertNotNull(jsonElement);
    assertTrue(jsonElement.getAsBoolean());
  }
  
  public void testAddingStringProperties() throws Exception {
    String propertyName = "property";
    String value = "blah";

    JsonObject jsonObj = new JsonObject();
    jsonObj.addProperty(propertyName, value);
    
    assertTrue(jsonObj.has(propertyName));
    
    JsonElement jsonElement = jsonObj.get(propertyName);
    assertNotNull(jsonElement);
    assertEquals(value, jsonElement.getAsString());
  }
  
  public void testAddingCharacterProperties() throws Exception {
    String propertyName = "property";
    char value = 'a';

    JsonObject jsonObj = new JsonObject();
    jsonObj.addProperty(propertyName, value);
    
    assertTrue(jsonObj.has(propertyName));
    
    JsonElement jsonElement = jsonObj.get(propertyName);
    assertNotNull(jsonElement);
    assertEquals(String.valueOf(value), jsonElement.getAsString());
    assertEquals(value, jsonElement.getAsCharacter());
  }
}