AddNullCouponTest
waitForElementPresent link=Coupons
clickAndWait link=Coupons
waitForElementPresent //input[@value='Add Coupon']
clickAndWait //input[@value='Add Coupon']
waitForElementPresent //input[@value='Save']
clickAndWait //input[@value='Save']
assertTextPresent You have entered invalid data. Please try again.
clickAndWait link=Return to Full Page