Automated UI WatIN Test - Setting date and format for Jquery Datepicker

I came across  situation where I have to write test case in which user will select date from calendar and that selected date and format has to asset in test case. Below DatePickerField class is useful to set date and format in JQuery Datepicker

using System;

using WatiN.Core;

namespace Twenty57.Stadium.TestHelpers.WatiNElements

{

       public class DatePickerField : Control<TextField>

       {

              public override WatiN.Core.Constraints.Constraint ElementConstraint

              {

                     get { return Find.ByClass("hasDatepicker"); }

              }

              public DateTime? Date

              {

                     get

                     {

                           if (Element.Text == null) return null;

                           var date = Eval("{0}('getDate').toUTCString()", ElementReference);

                            return DateTime.Parse(date);

                     }

                     set

                     {

                           var javascriptDate = "null";

                           if (value.HasValue)

                           {

                                  var date = value.Value;

                                  javascriptDate = string.Format("new Date({0}, {1}, {2})", date.Year, date.Month - 1, date.Day);

                           }

                           CallDatepicker("'setDate', {0}", javascriptDate);

                     }

              }

              public string DateFormat

              {

                     get { return GetOption("dateFormat"); }

              }

              public bool Enabled

              {

                     get

                     {

                           var isDisabled = CallDatepicker("'isDisabled'");

                           return !bool.Parse(isDisabled);

                     }

              }

              public string GetOption(string option)

              {

                     return CallDatepicker("'option', '{0}'", option);

              }

              private string ElementReference

              {

                     get

                     {

                           return string.Format("window.jQuery({0}).datepicker", Element.GetJavascriptElementReference());

                     }

              }

              private string CallDatepicker(string script, params object[] args)

              {

                     var theScript = string.Format(script, args);

                     return Eval("{0}({1})", ElementReference, theScript);

              }

              private string Eval(string script, params object[] args)

              {

                     return Element.DomContainer.Eval(string.Format(script, args));

              }

       }

}

[Test]

              public void TestSetDate()

              {

                     this.browser.GoTo(this.appURL + "/Page1");

                     this.browser.WaitForComplete();

                     DateTime dateToValidate = new DateTime(2013, 06, 11);               

                     string dateText = dateToValidate.ToString(Config.DateFormat);

                     string controlId = "Page1_DatePicker1";

                     DatePickerField datePicker = this.browser.Control<DatePickerField>(Find.ById(controlId));

                     Assert.IsNotNull(datePicker, string.Format("DatePicker with Id [{0}] not found.", controlId));

                     Assert.IsTrue(datePicker.Enabled, "DatePicker should be enabled.");

                     datePicker.Date = dateToValidate;

                     Assert.AreEqual(dateText, datePickerTextField.Text);

                     Assert.AreEqual(JQueryUIDatePickerHelper.GetDateFormat(), datePicker.DateFormat, "Date format is incorrect.");

}

JQueryUIDatePickerHelper is class which maps C# date format with JQuery Datepicker format.

public static class JQueryUIDatePickerHelper

       {

              public static string GetDateFormat()

              {

                     string currentFormat = Config.DateFormat;

                     currentFormat = currentFormat.Replace("dddd", "DD");

                     currentFormat = currentFormat.Replace("ddd", "D");

                     if (currentFormat.Contains("MMMM"))

                     {

                           currentFormat = currentFormat.Replace("MMMM", "MM");

                     }

                     else if (currentFormat.Contains("MMM"))

                     {

                           currentFormat = currentFormat.Replace("MMM", "M");

                     }

                     else if (currentFormat.Contains("MM"))

                     {

                           currentFormat = currentFormat.Replace("MM", "mm");

                     }

                     else

                     {

                           currentFormat = currentFormat.Replace("M", "m");

                     }

                     currentFormat = currentFormat.Contains("yyyy") ? currentFormat.Replace("yyyy", "yy") : currentFormat.Replace("yy", "y");

                     return currentFormat;

              }

       }