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Yahoo! UI Library

yuitest  2.5.0

Yahoo! UI Library > yuitest > ObjectAssert.js (source view)

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YAHOO.namespace("util");


//-----------------------------------------------------------------------------
// ObjectAssert object
//-----------------------------------------------------------------------------

/**
 * The ObjectAssert object provides functions to test JavaScript objects
 * for a variety of cases.
 *
 * @namespace YAHOO.util
 * @class ObjectAssert
 * @static
 */
YAHOO.util.ObjectAssert = {
        
    /**
     * Asserts that all properties in the object exist in another object.
     * @param {Object} expected An object with the expected properties.
     * @param {Object} actual An object with the actual properties.
     * @param {String} message (Optional) The message to display if the assertion fails.
     * @method propertiesAreEqual
     * @static
     */
    propertiesAreEqual : function (expected /*:Object*/, actual /*:Object*/, 
                           message /*:String*/) /*:Void*/ {
        
        //get all properties in the object
        var properties /*:Array*/ = [];        
        for (var property in expected){
            properties.push(property);
        }
        
        //see if the properties are in the expected object
        for (var i=0; i < properties.length; i++){
            YAHOO.util.Assert.isNotUndefined(actual[properties[i]], message || 
                    "Property'" + properties[i] + "' expected.");
        }

    },
    
    /**
     * Asserts that an object has a property with the given name.
     * @param {String} propertyName The name of the property to test.
     * @param {Object} object The object to search.
     * @param {String} message (Optional) The message to display if the assertion fails.
     * @method hasProperty
     * @static
     */    
    hasProperty : function (propertyName /*:String*/, object /*:Object*/, message /*:String*/) /*:Void*/ {
        if (YAHOO.lang.isUndefined(object[propertyName])){
            YAHOO.util.Assert.fail(message || 
                    "Property " + propertyName + " not found on object.");
        }    
    },
    
    /**
     * Asserts that a property with the given name exists on an object instance (not on its prototype).
     * @param {String} propertyName The name of the property to test.
     * @param {Object} object The object to search.
     * @param {String} message (Optional) The message to display if the assertion fails.
     * @method hasProperty
     * @static
     */    
    hasOwnProperty : function (propertyName /*:String*/, object /*:Object*/, message /*:String*/) /*:Void*/ {
        if (!YAHOO.lang.hasOwnProperty(object, propertyName)){
            YAHOO.util.Assert.fail(message || 
                    "Property " + propertyName + " not found on object instance.");
        }     
    }
};

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