Testing · Junior · Question 20 of 78

What does `.not` do in `expect(value).not.toBeNull()`?

✓Correct answer: Inverts the matcher
2Skips the assertion
3Marks the test as expected to fail

Explanation

Any matcher can be negated: .not.toContain, .not.toHaveBeenCalled and so on.

Further reading

Jest: Expect ↗

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