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 /**
 * UnexpectedValue is subclass of Error that is thrown whenever
 * a value was unexpected in its scope. This typically means that a test
 * was performed to determine that a value was *not* equal to a certain
 * value.
 *
 * @param {String} message The message to display when the error occurs.
 * @param {Object} unexpected The unexpected value.
 * @namespace Test
 * @extends AssertionError
 * @module test
 * @class UnexpectedValue
 * @constructor
 */
 YUITest.UnexpectedValue = function (message, unexpected){
 
 //call superclass
 YUITest.AssertionError.call(this, message);
 
 /**
 * The unexpected value.
 * @type Object
 * @property unexpected
 */
 this.unexpected = unexpected;
 
 /**
 * The name of the error that occurred.
 * @type String
 * @property name
 */
 this.name = "UnexpectedValue";
 
 };
 
 //inherit from YUITest.AssertionError
 YUITest.UnexpectedValue.prototype = new YUITest.AssertionError();
 
 //restore constructor
 YUITest.UnexpectedValue.prototype.constructor = YUITest.UnexpectedValue;
 
 /**
 * Returns a fully formatted error for an assertion failure. This message
 * provides information about the expected and actual values.
 * @method getMessage
 * @return {String} A string describing the error.
 */
 YUITest.UnexpectedValue.prototype.getMessage = function(){
 return this.message + "\nUnexpected: " + this.unexpected + " (" + (typeof this.unexpected) + ") ";
 };