Testing · Senior · Question 30 of 75

What does `expectTypeOf` in Vitest test?

expectTypeOf(parse("1")).toEqualTypeOf<number>();

✓Correct answer: Types at compile time - useful for libraries with complex generics
2The typeof of runtime values
3PropTypes of React components

Explanation

Type tests run with vitest --typecheck (or files *.test-d.ts).

Further reading

Vitest: Features ↗

Test yourself

Take the Testing · Senior quiz: questions and options are shuffled, and you get a review of your mistakes at the end.