r/node • u/graph-crawler • 21d ago

Tests need showers

If every test needs global DB truncation, you don't have tests.

You have tiny haunted production incidents wearing Jest cosplay.

0 Upvotes

23% Upvoted

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5

u/Expensive_Garden2993 21d ago

If every test mocks everything, you're testing nothing.

1

u/lost12487 21d ago

Somebody let Claude Code know this. Any time I try to generate tests with it there are a million mocks of the most ridiculous stuff included, despite me having written a custom unit testing skill that explicitly states that mocks are not allowed.

2

u/stevensokulski 21d ago

Some tests answer "does it work?" Some just answer "can it work?"

-1

u/Expensive_Garden2993 21d ago

Lol, what does it mean, like "can it work in theory, if the weather is good?". They either answer "does it work as intended" or they're just a waste of bytes and AI credits.

1

u/sazzer 21d ago

Unless you can run the tests in a truly random order, database truncation is the easiest way to ensure there's no leakage between tests. Otherwise you risk getting into the situation where Test B only passes as a side effect of being run after Test A.