oliverdavies.uk/source/_daily_emails/2022-11-14.md

title	pubDate	permalink	tags
Camel-case or snake-case for test methods?	2022-11-14	daily/2022/11/14/camel-case-or-snake-case-for-test-methods	testing

When writing object-orientated code, particularly in PHP, you usually write method names using camel-case letters - such as:

public function doSomething(): void {
  // ...
}

This is also true when writing methods within a test class - only that the method name is prefixed with the word test:

public function testSomething(): void {
}

This is probably expected and complies with the PSR code style standards like PSR-12.

Something that I've seen some PHP developers and some frameworks prefer is to write their test methods using snake-case letters and commonly removing the test prefix in favour of using an annotation:

/** @test */
public function the_api_should_return_a_200_response_code_if_everything_is_ok(): void {
  // ...
}

This is something that I've done myself for a while, but now I'm starting to reconsider both options.

Whilst it's more readable, especially for longer test names (which I like to write), it's not consistent with method names in non-test files or non-test methods in test files; it looks odd if I need to add another annotation (do I keep a single annotation on one line, or just those with multiple annotations on the separate lines), and to do this, I need to disable some code sniffer rules for code to pass the PHPCS checks.

If I used camel-cased names, I wouldn't need the PHPCS overrides, the annotations would be simpler, and the code would be more consistent - so I think I'll try that way again in the next tests that I write and see how it feels.

Which do you prefer, and which would you expect to see in your project?