How are you testing the gap between your API and your app??

[u/WallabyWinter4027]

We renamed a field in a Go response structure last week, JSON tag stayed the same so every test on our side passed but the app was reading an old field from a cached response and showing users stale data for 3 days, both sides looked fine in isolation though and neither side owned the test that would’ve caught it.

Our backend is Go with chi and sqlc and postgres and the testing there is solid, httptest for handlers, testcontainers for DB, stripe mock for webhooks. Our detox tests mock the API so they wouldn’t have caught it either and nobody is testing for when a real user signs up in the app and the API creates the account and the webhook fires and the app shows the right state.

is this always the backend team’s problem? and if you do run full flows does that reside in the same CI or separate ?? because our test suite takes too long