Generate test signature #436
Description
Problem
Testing signature verification end to end is challenging, as it requires generating a time sensitive, encoded signature.
There are options to work around this like stubs, or alternate code flows under test, but ideally an integration test goes completely end to end, where the incoming request + signature is fully validated.
Solution
It would be great if this crate provided a way to more easily generate test signatures.
Other Stripe libraries provide this functionality, like stripe-node.
Alternatives
The signature can be generated manually, but it's an error prone operation that would be great to have a standard definition for.
I'm aware that #374 exists, but it doesn't lend itself to full end to end testing as it requires an alternative code flow.