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Jest/Vitest interactive course (runs in the browser) (howtotestfrontend.com)
8 points by howToTestFE 2 days ago
3 comments
halflife 15 minutes ago
Jest mocks allow developers to write bad code. Instead of separating concerns with DI, jest mocks overwrite the importing mechanism without any type safety. Also, if you wish to migrate to native node test runner, the mocks lock you into jest.

Use proper mocks with ts mockito and it will force you to write better code.

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howToTestFE 7 minutes ago
100%. its a horrible code smell, and AI loves to jest.mock (or vi.mock()). (The most recent blog post on my site covers this as one of the things to look out for in AI generated tests...)

in JS (with Jest/Vitest) it is far too easy to call mock()...

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felooboolooomba 24 minutes ago
Vitest is a brilliant software. I wish that the vitest vscode extension would be managed in a more careful manner though, too buggy for me to use.
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howToTestFE 19 minutes ago
yup vitest is great (my default choice for new projects).

vitest browser mode is really nice too. (new-ish feature, although at this point it isn't exactly new).

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howToTestFE 2 days ago
learn step by step the main features of both Jest and Vitest (they're very similar for most common usages) in these interactive4 lessons
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