Vitest allows you to write tests for your types, using expectTypeOf or assertType syntaxes. By default all tests inside *.test-d.ts files are considered type tests, but you can change it with typecheck.include config option. Under the hood Vitest calls tsc or vue-tsc, depending on your config, and parses results. Vitest will also print out type errors in your source code, if it finds any. You can
