Shopify/active_merchant — pull request #1450 by jpcaissy (2014-11-05 19:57:34+00:00)
Title: Adds standard error codes on purchase and authorize of bogus gateway

I'm in the process of testing the integration of active_merchant's standard error codes, so it just seemed natural to add the `processing_error` standard error code to any failure response of bogus gateway.

@girasquid @ntalbott @jnormore

/cc @mcgain