jest.spyOn behaviour

Question

jest.spyOn behaviour

Miklet opened this issue 4 years ago · comments

Hi Kent!

I would like to ask you about jest.spyOn. In your course you have mentioned that spyOn does replace original implementation with an empty mock function. According to Jest's documentation and my own experience with using that function it doesn't by default. Was that a mistake :)?

Cheers and thank you for your awesome job!

Kent C. Dodds · Answer 1 · Wed Dec 18 2019 01:29:05 GMT+0800 (China Standard Time)

You're correct. Where do I say that?

Paweł Mikołajczyk · Answer 2 · Wed Dec 18 2019 01:56:06 GMT+0800 (China Standard Time)

Here: https://testingjavascript.com/lessons/jest-restore-the-original-implementation-of-a-mocked-javascript-function-with-jest-spyon at 0:26 it starts.

Kent C. Dodds · Answer 3 · Wed Dec 18 2019 05:25:52 GMT+0800 (China Standard Time)

Yep. That's wrong. Thanks for letting me know. I'll look into getting that fixed.

Paweł Mikołajczyk · Answer 4 · Wed Dec 18 2019 13:07:12 GMT+0800 (China Standard Time)

You're welcome!

Kent C. Dodds · Answer 5 · Wed Dec 18 2019 23:38:53 GMT+0800 (China Standard Time)

This has been fixed. Thanks!