testing – Page 23 – Türker Yıldırım

script setup, and the Vue component that lost its boilerplate

Deep diveAugust 17, 202110 min read

3.2 in August makes the compiler macro stable. Every component ended with a return listing what it had just declared, and a compiler can work that out.

A CSV export that streams instead of collapsing

Deep diveJuly 29, 202110 min read

An export that worked until the account with 400,000 rows. fetchAll, a collection and a string built in memory, at 512 MB.

Block-based widgets broke every widget we had written

Deep diveJuly 29, 202110 min read

5.8 replaced the widget screen with a block editor. Six custom widgets became six HTML blocks full of rendered markup.

tmpfs for a test database, and the speed it buys

NoteJune 27, 20212 min read

A test database is disposable by definition, so writing it to disk is paying durability costs for data that is deleted at the end of the run. The…

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.

Compose v2 is a plugin, and the hyphen finally goes

Deep diveMay 19, 20219 min read

The same command, spelled two ways, on eight machines. A Python program became a Go plugin, and the container names changed underneath every script.

Http::fake, and the assertion that a call was made

NoteMay 13, 20212 min read

Http::fake without an assertion tests that your code did not crash, which is not the same as testing that it called anything. The catch-all returning a 500 is…

Bootstrap 5 removed jQuery and found what depended on it

Deep diveMay 5, 202110 min read

A CSS framework upgrade that turned out to be a JavaScript audit. The modals work and four things around them do not.

An index that made writes slower than the reads it saved

Deep diveApril 23, 202110 min read

Eleven indexes on a table with a heavy write path. Every index is a write amplification that nobody measured, and three of them were never used.

Fault injection: timeout, 500, and a slow trickle

NoteApril 21, 20211 min read

Every test mocks a fast success, and every production incident is one of the four failure modes nobody wrote a test for. The slow trickle is the one…