case studies
Case Study: Putting an Old Admin Panel Behind AfterGuard
This case uses the examples/legacy-admin folder from the code repository: a small stand-in for a real old admin panel, and the guard.yaml and fixture that ship in every …
Posts
afterconfig
How AfterConfig Was Tested to Never Write a Vendor Config File
AfterConfig makes four promises, and the tests go after each one. It never writes the vendor’s file. It never changes what the overlay doesn’t name. A failed …
afterguard
How AfterGuard Was Tested to Let Nothing Ambiguous Through
A security gateway is only as good as its worst gap, so AfterGuard got a written threat model before any code, and every promise in it got a test. Six promises: nothing …
afterhook
How AfterHook Was Tested to Turn Every Change Into One Event
AfterHook makes four promises. Every change gives exactly one event. Nothing is lost while the receiver is down or across restarts. A source that didn’t change by …
afterschema
How AfterSchema Was Tested
AfterSchema makes two promises that matter. It never writes a database. And when schema test says an old read gives the same rows through the views, it does: same values, …
afterconfig
How TOML Support in AfterConfig Was Tested
TOML in AfterConfig makes one promise on top of the old ones: the output is the vendor’s file with only your changes in it. Comments, spacing and every untouched …
afterapi
AfterAPI Released to Keep Old API Clients Working
Aftermarket 0.2.0 adds a second tool. AfterAPI, run as aftermarket adapt, keeps an old client working after the API it was written for has been replaced. AfterPatch fixes …
aftertest
AfterTest and AfterDiff Released to Record Traffic and Compare Versions
Aftermarket 0.3.0 adds two tools that work as a pair. AfterTest, run as aftermarket record, saves real traffic as test fixtures. AfterDiff, run as aftermarket replay, …
case studies
Case Study: Catching a Renamed Field Before Release With AfterTest and AfterDiff
This is a worked case on two small stand-in versions of an orders service. Every command and every line of output below comes from a real run of aftermarket 0.3.0. The …
case studies
Case Study: Fixing a Moved Exchange Rate Endpoint With Two AfterPatch Rules
This is a worked case on a small stand-in service, built to look like a common kind of break. Every command and every line of output below comes from a real run of …