Testing · Junior · Question 18 of 78

Why does this check fail and how do you fix it?

expect(0.1 + 0.2).toBe(0.3);

✓Correct answer: Floating-point arithmetic gives 0.30000000000000004; use toBeCloseTo(0.3)
2toBe doesn't work with numbers; use toEqual
3It doesn't fail

Explanation

toBeCloseTo compares with a given precision (2 decimal digits by default).

Further reading

Jest: Expect ↗

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