testing – Page 20 – Türker Yıldırım

The N+1 that was in the authorisation layer

Deep diveApril 4, 202210 min read

A policy check that loads the model’s owner, per row. 200 queries on a page with 50 items and correct eager loading.

Moved blocks, and the Terraform refactor that destroyed nothing

Deep diveMarch 30, 202210 min read

1.1, and a block that renames a resource without destroying it. Renaming a module meant a plan that wanted to drop a database.

A path repository, for the package you are writing today

NoteMarch 28, 20222 min read

A path repository symlinks a local directory into vendor, so a change to the package is visible immediately without a version, a tag or a push. The symlink…

StrictMode double-invokes effects in development, deliberately

NoteMarch 25, 20222 min read

18 mounts, unmounts and remounts every component once in development under StrictMode, so an effect without cleanup runs twice and shows it. Every failure it produces is a…

Concurrent rendering is not a feature you turn on

Deep diveMarch 15, 202214 min read

18 in March, after two years of alpha, and createRoot is the whole opt-in. Then a fortnight of consequences.

The test suite that took twelve minutes and now takes ninety seconds

Deep diveMarch 8, 202210 min read

Twelve minutes, six times a day, per developer. Nobody ran it locally, so it only ever failed in CI.

Effects running twice in StrictMode break a naive test

NoteMarch 8, 20222 min read

A test asserting that a fetch happened once fails under React 18 development mode, and the test is wrong rather than the framework. Loosening the assertion to toHaveBeenCalled…

Full-text search that did not need a search engine

Deep diveMarch 3, 202210 min read

A search cluster running for one feature on 40,000 rows. The operational cost was larger than the feature it served.

Rendering a block template in a test

NoteFebruary 24, 20222 min read

A block theme has no PHP for a unit test to call, and the nearest equivalent is rendering the template and asserting on the markup. go_to sets the…

Laravel 9 moved to Symfony 6 and took PHP 8 with it

Deep diveFebruary 17, 20229 min read

February, the first annual major, and a version number that means less than it used to. The work is two packages that block everything.