[TECH] Migrate tests from jest to vitest

[Romakita]

[derevnjuk]

@Romakita what do you think about migrating to the native test runner, thereby completely eliminating the need to use jest, vitest, and mocha? Like vitest it has a jest-compatible API, as result the migration process will be a quite straightforward.

[Romakita]

I haven’t tested a native test runner. But native test runner add some feature like coverage (autoUpdate, transformers, globalsetups) that are required by the current stack ;) And I prefer to use a tool that is used by major project to detect issue related to jest / vitest early.

[Romakita]

Done

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