TypeError: TestEnvironment is not a constructor in combination with Enzyme
See original GitHub issueWith Enzyme installed, running tests:
"test": "react-scripts test --env=jsdom"
Throws the error:
TypeError: TestEnvironment is not a constructor
at runTest (node_modules/react-scripts/node_modules/jest/node_modules/jest-cli/build/runTest.js:30:15)
The tests run correctly when removing --env=jsdom
.
Issue Analytics
- State:
- Created 7 years ago
- Reactions:1
- Comments:6 (5 by maintainers)
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We’re going to cut a patch fixing this today but for now, you can work around it by opening
node_modules/react-scripts/node_modules/jest-config/build/normalize.js
and commenting out lines 80 to 90.I fixed this locally by commenting these lines out. In case of Create React App it is incorrect to resolve relative to
rootDir
because that’s not where Jest is. It should tryrequire.resolve()
first—at least for our use case.