# go through front-end checkout process
# confirm, that on `Shipping Information` step `E-mail` field was not required
# go through front-end checkout process with filling not required `E-mail` field on `Shipping Information` step with value `shipping@intechnic.com` and with filling required `E-mail` field on `Billing Information` step with value `billing@intechnic.com`
# confirm that on `Order Preview` step on the left, in the `Shipping Information` subsection is shown `EmailAddress: shipping@intechnic.com` and on the right, in the `Billing Information` subsection is shown `EmailAddress: billing@intechnic.com`