def test_discount_calculation(self):
        c = Coupon()
        c.discount_amount = "10.00"

        self.assertEqual(10.00, c.discount(10.00))
        #make sure it's indepent of price for dollar value coupons
        self.assertEqual(10.00, c.discount(25.00))

        c.is_percent = True
        self.assertEqual(2.5, c.discount(25.00))
        self.assertEqual(1.0, c.discount(10.00))
 def test_discount_calculation(self): 
     c = Coupon()
     c.discount_amount = "10.00"
     
     self.assertEqual(10.00, c.discount(10.00))
     #make sure it's indepent of price for dollar value coupons
     self.assertEqual(10.00, c.discount(25.00)) 
     
     c.is_percent = True
     self.assertEqual(2.5, c.discount(25.00)) 
     self.assertEqual(1.0, c.discount(10.00))