Jest configuration setupFilesAfterEnv option was not found - path

Question

I'm trying to make Jest work again on a project developped 1 year ago and not maintained.
I have an error with path of setupFilesAfterEnvor transform.
the error i get when i run "yarn test"
$ jest __testsv2__ --config=./jest.config.js
● Validation Error:
Module <rootDir>/jest/setup.js in the setupFilesAfterEnv option was not found.
<rootDir> is: /Users/alain/dev/ddf/release
Configuration Documentation:
https://jestjs.io/docs/configuration.html
error Command failed with exit code 1.
my filesystem, in /Users/alain/dev/ddf/release/ i have
babel.config.js
jest.config.js
/jest
/setup
setup.js ( so full path is : /Users/alain/dev/ddf/release/jest/setup.js )
staticFileAssetTransform.js ( so full path is : /Users/alain/dev/ddf/release/jest/staticFileAssetTransform.js )
My package.json
{ ...
"scripts": {
"test": "jest __testsv2__ --config=./jest.config.js"
...
}
}
babel.config.js
module.exports = function(api) {
api.cache(false);
const presets = ['#babel/preset-env', '#babel/preset-react'];
const plugins = [['#babel/proposal-object-rest-spread'],];
return {
presets, plugins, sourceMaps: "inline",
ignore: [(process.env.NODE_ENV !== 'test' ? "**/*.test.js" : null) ].filter(n => n)
};
};
jest.config.js
module.exports = {
resolver: 'browser-resolve',
clearMocks: true,
moduleNameMapper: { '\\.(css|less|styl|md)$': 'identity-obj-proxy' },
// A list of paths to modules that run some code to configure or set up the testing framework before each test
// setupFilesAfterEnv: ['./jest/setup.js'], // don't work too
setupFilesAfterEnv: ['<rootDir>/jest/setup.js'],
// An array of regexp pattern strings that are matched against all test paths, matched tests are skipped
testPathIgnorePatterns: ['/node_modules/', '/__gql_mocks__/'],
// A map from regular expressions to paths to transformers
transform: {
'^.+\\.js$': './jest/babelRootModeUpwardTransform.js',
'\\.(jpg|jpeg|png|gif|eot|otf|webp|svg|ttf|woff|woff2|mp4|webm|wav|mp3|m4a|aac|oga)$': '<rootDir>/jest/staticFileAssetTransform.js',
},
};

Answer 1

You might want to delete your node modules, package-lock.json and run npm i again, I had a similar issue and that was a fix for me. Also try npm cache clean --force

Answer 2

For those coming here, make sure you prefix the path with <rootDir>
Like this:
setupFilesAfterEnv: ['<rootDir>/node_modules/#hirez_io/observer-spy/dist/setup-auto-unsubscribe.js']