public void ApplyCoupon(string coupon)
{
CouponCode.SetText(coupon);
ApplyCouponButton.Click();
MessageAlert.ToHasContent().ToBeVisible().WaitToBe();
MessageAlert.ValidateInnerTextIs(CouponSuccessfullyAdded);
}
// 3. These elements are always used together when coupon is applied. There are many test cases where you need to apply different coupons and so on.
// This way you reuse the code instead of copy-paste it. If there is a change in the way how the coupon is applied, change the workflow only here.
// Even single line of code is changed in your tests.
public void ApplyCoupon(string coupon)
{
CouponCode.SetText(coupon);
ApplyCouponButton.Click();
MessageAlert.ToHasContent().ToBeVisible().WaitToBe();
// Usually, it is not entirely correct to make assertions inside action methods. However, Validate methods are just waiting for something to happen.
MessageAlert.ValidateInnerTextIs(CouponSuccessfullyAdded);
}