Snapshots tests fail for jest 20 with jest-serializer-enzyme

[ismay]

When upgrading to jest 20 the snapshot tests I'm running with shallow rendering fail because the results aren't being serialized anymore:

• https://travis-ci.org/ismay/ismaywolff.nl/builds/229692127
• https://github.com/ismay/ismaywolff.nl/pull/407

According to the jest docs and blog there shouldn't be any breaking changes that affect this:

• https://github.com/facebook/jest/blob/master/CHANGELOG.md#jest-2000
• https://facebook.github.io/jest/blog/2017/05/06/jest-20-delightful-testing-multi-project-runner.html#breaking-changes

But still they're failing (it's rendering the shallow wrapper directly, instead of the serialized result), while tests that aren't using enzyme pass. I was wondering if there is anything that needs to be changed when using this library with jest 20.

[ismay]

Using ReactShallowRenderer seems to fix it though. So I'm not sure what's going on here. Seems to me that it's the serialization, but I could be wrong.

[ismay]

I think the problem is this: jestjs/jest#3535. My config is:

{
  "snapshotSerializers": [
    "<rootDir>/node_modules/jest-serializer-enzyme"
  ]
}

And apparently rootDir isn't being resolved anymore.

[mAiNiNfEcTiOn]

@ismay yup, you should just have:

{
  "snapshotSerializers": [
    "jest-serializer-enzyme"
  ]
}