testing – Page 25 – Türker Yıldırım

The cache that returned stale data for eleven days

Deep diveMarch 4, 202110 min read

A price change that took eleven days to reach one page. Three caches, and only one of them was being cleared.

Recording a real response, including the ugly ones

NoteMarch 2, 20212 min read

Hand-written fixtures encode what you believe the provider returns, and providers return things nobody believes. The 502 with an HTML body is the one that reaches production, because…

A laptop profile is a hypothesis, not a finding

NoteFebruary 25, 20211 min read

Four differences between a development machine and production can each invert the conclusion a profile suggests. The dataset difference is the one that inverts rather than scales: an…

An OpenAPI document that is the test suite’s source of truth

Deep diveFebruary 23, 202110 min read

3.1 lands in February with real JSON Schema. Generating docs from code fixes half the problem; making the document the contract fixes the other half.

A data provider runs before setUp

NoteFebruary 22, 20212 min read

Providers are collected during test discovery, long before any setUp has run, so a provider touching the application container or the database fails. String keys on the provider…

Transactions per test, and the three things that break

NoteFebruary 22, 20212 min read

Wrapping each test in a transaction and rolling back is much faster than migrating between tests, and three things do not survive it. The second connection case is…

The N+1 that only appeared in the API serialiser

Deep diveFebruary 14, 202110 min read

A controller with eager loading and four hundred queries anyway, because the query count depends on which fields the client asked for.

A queue worker that stops cleanly

Deep diveFebruary 11, 202110 min read

A deploy killed a worker mid-job and a customer was charged without an order. SIGTERM, a grace period that was too short, and the job that must be…

Vite in development and webpack in production is a real answer

Deep diveFebruary 9, 20218 min read

A 38-second dev server start on a machine with nothing else to do. Native ESM changes the feedback loop, and running two build tools has a specific cost.

A matrix with an exclude, for the one combination that fails

NoteFebruary 5, 20212 min read

A matrix of PHP versions against WordPress versions produces a grid, and two cells of it are combinations that were never supported. fail-fast: false is the setting that…