phpunit – Page 4 – Türker Yıldırım

Testing a block theme without a browser

Deep diveFebruary 16, 202210 min read

A theme with no PHP has nothing a unit test can call, and the only test is a person looking at a page.

A test that queries for data it did not create

NoteJanuary 27, 20221 min read

A test calling first() depends on whatever happens to be in the database, which is an ordering dependency nobody wrote down. The failure only appears under a randomised…

A randomised test order, in CI, on every push

NoteDecember 20, 20211 min read

Tests that pass in file order and fail in any other order are testing the order, and the coupling is invisible until something is added. The seed being…

Readonly properties and the value object that stops defending itself

Deep diveDecember 7, 202110 min read

8.1, and a keyword that removes a getter per property. Forty value objects, each with private fields and public accessors that existed only to prevent writes.

Static analysis at level 8, and the six months it took

Deep diveNovember 26, 202115 min read

1.0 in November after five years of 0.x. Level 0 passes and finds nothing anybody cared about; raising the level all at once does not work.

A database per parallel worker

NoteNovember 23, 20212 min read

Eight parallel workers against one database is eight processes fighting over the same rows, and the failures look like flakiness. The setup cost is what determines whether parallelism…

Testing what happens when the third party is down

Deep diveSeptember 22, 202110 min read

Every test mocks a 200 and production returned a 502 with an HTML body. The happy path is the only path with coverage.

Two hundred integration tests that share one database

Deep diveMay 27, 202110 min read

A suite that passes alone and fails in a different order. Test 141 depends on a row test 88 created, and nobody wrote that down.

A WordPress plugin with a test suite that runs in CI

Deep diveMarch 18, 202110 min read

A plugin on forty sites and no test that was not a person clicking. WordPress is a global, and the matrix is the actual value.

Mutation testing finds the test that asserts nothing

NoteMarch 10, 20212 min read

Line coverage says a line ran, and mutation testing says a test would have noticed if it were wrong. The forty-three are the interesting number and they are…