testing – Page 14 – Türker Yıldırım

A block that renders on the server and edits on the client

Deep diveMarch 17, 202310 min read

A block showing live stock levels, which cannot be saved into post content. Static markup that was wrong the moment it was written.

A read replica, and the six queries that could not use it

Deep diveMarch 16, 202314 min read

A primary at 80% CPU and reports running during the working day. Setting up the replica takes an afternoon; the consistency model takes a month.

PHPUnit 10, and the event system that replaced listeners

NoteMarch 14, 20232 min read

The old TestListener interface is gone, and the replacement is a set of typed events with subscribers. The typed events are a genuine improvement over a nine-method interface…

A build stage that exists only to fail the build

NoteMarch 8, 20232 min read

A stage that runs the analyser and the tests, produces no artefact, and is depended on by the final stage so it cannot be skipped. BuildKit skips any…

Attributes instead of annotations, everywhere

NoteMarch 6, 20232 min read

PHPUnit 10 deprecates the docblock forms in favour of attributes, which is a mechanical change across every test file and a real improvement. Attributes are parsed by the…

The generic PHP does not have, and the analyser that does

Deep diveFebruary 27, 20239 min read

A collection class that returns mixed, and forty call sites asserting the type by hand. Docblock generics, and where they stop being worth it.

PHPUnit 10, and the listeners that no longer exist

Deep diveFebruary 20, 202314 min read

10.0 in February, a configuration file that has accreted since 2014, and a custom TestListener that the new version has no place for.

Time in tests, and the clock we injected

NoteFebruary 16, 20232 min read

A test that fails between 23:00 and midnight, once a year, and passes on every rerun. PSR-20 standardised this interface in 2022, which is worth adopting for the…

Coverage on a directory, not on a percentage

NoteFebruary 14, 20232 min read

A global threshold of 80% says nothing about whether the code that matters is tested, and it is satisfied by testing the code that is easy. Different code…

An HTTP client faked at the PSR-18 boundary

NoteFebruary 8, 20232 min read

Mocking a client library’s own interface couples every test to that library; faking the standard interface does not. Throwing on an unstubbed request is the design decision that…