# JSONAssert.java

    /*
     * Copyright (c) 2012, Paul Merlin.
     *
     * 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 org.qi4j.test.util;

    import java.util.Iterator;
    import org.json.JSONArray;
    import org.json.JSONException;
    import org.json.JSONObject;
    import org.junit.Assert;

    /**
     * A set of assertion methods useful for tests using org.json.
     */
    public class JSONAssert
        extends Assert
    {

        /**
         * Assert that two JSONObjects are equals without enforcing field order.
         */
        public static void jsonObjectsEquals( JSONObject o1, JSONObject o2 )
            throws JSONException
        {
            if( o1 != o2 )
            {
                if( o1.length() != o2.length() )
                {
                    fail( "JSONObjects length differ: " + o1.length() + " / " + o2.length() );
                }
                @SuppressWarnings( "unchecked" )
                Iterator<String> o1Keys = o1.keys();
                while( o1Keys.hasNext() )
                {
                    String key = o1Keys.next();
                    Object o1Value = o1.get( key );
                    Object o2Value = o2.get( key );
                    if( !jsonValueEquals( o1Value, o2Value ) )
                    {
                        fail( "JSONObject '" + key + "' values differ: " + o1Value + " / " + o2Value );
                    }
                }
            }
        }

        /**
         * Assert that two JSONArrays are equals.
         */
        public static void jsonArraysEquals( JSONArray a1, JSONArray a2 )
            throws JSONException
        {
            if( a1 != a2 )
            {
                if( a1.length() != a2.length() )
                {
                    fail( "JSONArrays length differ: " + a1.length() + " / " + a2.length() );
                }
                for( int idx = 0; idx < a1.length(); idx++ )
                {
                    Object a1Value = a1.get( idx );
                    Object a2Value = a2.get( idx );
                    if( !jsonValueEquals( a1Value, a2Value ) )
                    {
                        fail( "JSONArray '" + idx + "' values differ: " + a1Value + " / " + a2Value );
                    }
                }
            }
        }

        private static boolean jsonValueEquals( Object o1Value, Object o2Value )
            throws JSONException
        {
            if( o1Value instanceof JSONObject )
            {

                if( !( o2Value instanceof JSONObject ) )
                {
                    return false;
                }
                jsonObjectsEquals( (JSONObject) o1Value, (JSONObject) o2Value );

            }
            else if( o1Value instanceof JSONArray )
            {

                if( !( o2Value instanceof JSONArray ) )
                {
                    return false;
                }
                jsonArraysEquals( (JSONArray) o1Value, (JSONArray) o2Value );

            }
            else if( !o1Value.equals( o2Value ) )
            {

                return false;

            }
            return true;
        }

        private JSONAssert()
        {
        }

    }