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To limit the scope for example purposes, let’s say we act as a vendor with 90% of payments coming from North America and from the 4 major card networks. Further, the discount is driven by the amount alone being higher than 100 (regardless of the currency). With those assumptions, the initiation of your TCD model could look like this:
Value expansions cover card types and currencies we rarely experience in production. They also add extra variety to the amounts for boundary and format testing. We can then add this rule – “Amount[with discount] <-> Discount[“-10.00”]”- and see how TCD quickly generates the scenarios:
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