Jest environment.teardown error with CRA (conflicting versions)

[v1adko]

Note:

This is not an issue per se, but more of a heads-up/unofficial docs for people who encounter the same problem. However this can spark some discussions on how to manage versions of the external (app) and internal (toolbox) dependencies.

Env:

• kcd-scripts ^0.42.1:
• node: 8.11.3
• yarn 1.9.4

What you did:

Use default pre-commit on CRA based repo.

What happened:

TypeError: environment.teardown is not a function

Problem description:

The issue is realated to the fact that CRA does not allow conflicting Jest versions.

Related issues for some background: jest#6393, jest#5119

Suggested solution:

Add lint-staged entry in your package.json, ultimately overwriting actions on pre-commit hook, something along these lines

  "lint-staged": {
    "*.js": [
      "yarn format",
      "yarn lint",
      "git add"
    ]
  },

[kentcdodds]

Yeah, not much we can do about this I'm afraid. Thanks for making it googleable though!