# Yahoo! UI Library

### test 3.0.0

Yahoo! UI Library > test > DateAssert.js (source view)
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        /**
         * The DateAssert object provides functions to test JavaScript Date objects
         * for a variety of cases.
         *
         * @class DateAssert
         * @static
         */

        Y.DateAssert = {

            /**
             * Asserts that a date's month, day, and year are equal to another date's.
             * @param {Date} expected The expected date.
             * @param {Date} actual The actual date to test.
             * @param {String} message (Optional) The message to display if the assertion fails.
             * @method datesAreEqual
             * @static
             */
            datesAreEqual : function (expected, actual, message){
                Y.Assert._increment();
                if (expected instanceof Date && actual instanceof Date){
                    var msg = "";

                    //check years first
                    if (expected.getFullYear() != actual.getFullYear()){
                        msg = "Years should be equal.";
                    }

                    //now check months
                    if (expected.getMonth() != actual.getMonth()){
                        msg = "Months should be equal.";
                    }

                    //last, check the day of the month
                    if (expected.getDate() != actual.getDate()){
                        msg = "Days of month should be equal.";
                    }

                    if (msg.length){
                        throw new Y.Assert.ComparisonFailure(Y.Assert._formatMessage(message, msg), expected, actual);
                    }
                } else {
                    throw new TypeError("Y.Assert.datesAreEqual(): Expected and actual values must be Date objects.");
                }
            },

            /**
             * Asserts that a date's hour, minutes, and seconds are equal to another date's.
             * @param {Date} expected The expected date.
             * @param {Date} actual The actual date to test.
             * @param {String} message (Optional) The message to display if the assertion fails.
             * @method timesAreEqual
             * @static
             */
            timesAreEqual : function (expected, actual, message){
                Y.Assert._increment();
                if (expected instanceof Date && actual instanceof Date){
                    var msg = "";

                    //check hours first
                    if (expected.getHours() != actual.getHours()){
                        msg = "Hours should be equal.";
                    }

                    //now check minutes
                    if (expected.getMinutes() != actual.getMinutes()){
                        msg = "Minutes should be equal.";
                    }

                    //last, check the seconds
                    if (expected.getSeconds() != actual.getSeconds()){
                        msg = "Seconds should be equal.";
                    }

                    if (msg.length){
                        throw new Y.Assert.ComparisonFailure(Y.Assert._formatMessage(message, msg), expected, actual);
                    }
                } else {
                    throw new TypeError("DateY.AsserttimesAreEqual(): Expected and actual values must be Date objects.");
                }
            }

        };

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