Jest quiz

Test your Jest knowledge with a free interactive quiz — 50 questions with answers and explanations. No signup needed to play.

How do you assert a function was called exactly N times?

1. How do you assert a function was called exactly N times?
2. Which command runs Jest?
3. How do you test asynchronous code that returns a Promise?
4. What does `jest.fn()` create?
5. What does `jest --watch` do?
6. How do you assert a string matches a regex?
7. How do you run only one test in a file?
8. How do you assert a function throws?
9. What is Jest?
10. What is a "snapshot" test?
11. How do you run setup code before each test in a `describe` block?
12. How do you measure code coverage?

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