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TypeError: expect.addSnapshotSerializer is not a function #71

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willmruzek opened this issue Apr 1, 2017 · 3 comments
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TypeError: expect.addSnapshotSerializer is not a function #71

willmruzek opened this issue Apr 1, 2017 · 3 comments
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@willmruzek
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I receive the following error when I try to run my tests with jest-enzyme:

TypeError: expect.addSnapshotSerializer is not a function
@blainekasten
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I'm assuming you ignored the npm peer dependency warnings :)

Jest added this feature in version 19 hence this [https://github.com/blainekasten/enzyme-matchers/blob/master/packages/jest-enzyme/package.json#L46](peer dep).

You either need to upgrade jest or use a 2.x version of jest-enzyme that supports older versions of jest.

@andrei-e-random andrei-e-random mentioned this issue Apr 5, 2017
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@andrei-e-random
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Created a PR to add what you mentioned in the README.

I'm expecting people new to the ecosystem to use create-react-app a lot and stumble upon enzyme eventually. And I'm not really expecting many of them to read peer dependency warnings :).

@blainekasten
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Awesome! Thanks so much!

blainekasten pushed a commit that referenced this issue Apr 6, 2017
@andrei-e-random @blainekasten
Updated Usage with Create React App - avoiding #71 (#72)
f1f42ff 
Using jest-enzyme@3.0.0+ with Create React App is causing "TypeError: expect.addSnapshotSerializer is not a function" error.
This is happening because jest-enzyme@3.0.0+ depends on jest@19.0.0 while Create React App is currently using jest@18.1.0.
Added README warning - pending to be modified when Create React App updates their Jest dependency.

See also #71.
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@willmruzek @blainekasten @andrei-e-random