Testing · Junior · Question 17 of 78

How does `toStrictEqual` differ from `toEqual`?

✓Correct answer: It also checks undefined properties, sparse arrays and object types (class instances vs plain objects)
2It compares by reference
3It ignores the order of array elements

Explanation

expect({ a: undefined, b: 2 }).toEqual({ b: 2 }) passes, but toStrictEqual fails.

Further reading

Jest: Expect ↗

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