datepickers.html

<input class="w-100 hasDatepicker" data-clear-button-text="Datum zurücksetzen" data-dateformat="dd.mm.yy" data-daynames="['So','Mo','Di','Mi','Do','Fr','Sa']" data-firstday="monday" data-monthnames="['Januar','Februar','März','April','Mai','Juni','Juli','August','September','Oktober','November','Dezember']" id="booking_checkin_date" name="booking[checkin_date]" placeholder="mm/tt/jjjj" size="30" type="text">
<input class="w-100 hasDatepicker" id="booking_checkout_date" name="booking[checkout_date]" placeholder="mm/tt/jjjj" size="30" type="text">

utils_spec.coffee

describe "wimdu.utils", ->
  describe "datePickers", ->
    beforeEach ->
      loadFixtures("datepickers.html")
      wimdu.utils.datePickers($("#booking_checkin_date"), $("#booking_checkout_date"), true);

    it "sets the checkout_date after selecting a checkin_date", ->
      $("#booking_checkin_date").datepicker("show")
      $(".ui-datepicker-today").click()
      expect($("#booking_checkout_date").val()).toBeGreaterThan(new Date)