Hey there, I'm currently working on a project which includes TypeScript and Express.js. Right now, my main focus is on setting up the tests. However, when I try to run yarn test (which essentially runs jest without any additional flags), I encounter this specific error:
PS C:\Users\joaov\Documents\gittin> yarn test
yarn run v1.22.10
$ jest
Error: Jest: Failed to parse the TypeScript config file C:\Users\joaov\Documents\gittin\jest.config.ts
TSError: ⨯ Unable to compile TypeScript:
jest.config.ts:1:1 - error TS2580: Cannot find name 'module'. Do you need to install type definitions for node? Try `npm i --save-dev @types/node`.
1 module.exports = {
~~~~~~
at readConfigFileAndSetRootDir (C:\Users\joaov\Documents\gittin\node_modules\jest-config\build\readConfigFileAndSetRootDir.js:118:13)
at readConfig (C:\Users\joaov\Documents\gittin\node_modules\jest-config\build\index.js:227:18)
at readConfigs (C:\Users\joaov\Documents\gittin\node_modules\jest-config\build\index.js:412:26)
at runCLI (C:\Users\joaov\Documents\gittin\node_modules\@jest\core\build\cli\index.js:220:59)
at Object.run (C:\Users\joaov\Documents\gittin\node_modules\jest-cli\build\cli\index.js:163:37)
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
I've been informed that the reason behind this error is the inclusion of the property typeRoots in my tsconfig.json. By commenting out that line, the tests do work as intended, but I am curious to find out how I can make the typeRoots functionality compatible with jest in order to retain that necessary local type.
To expedite things, here are the contents of my tsconfig.json and jest.config.ts files respectively:
{
"compilerOptions": {
"target": "es5",
"module": "commonjs",
"outDir": "dist",
"rootDir": "src",
"removeComments": true,
"strict": true,
"strictPropertyInitialization": false,
"typeRoots": ["./src/@types"],
"esModuleInterop": true,
"experimentalDecorators": true,
"emitDecoratorMetadata": true,
"skipLibCheck": true,
"forceConsistentCasingInFileNames": true
},
"exclude": [
"src/**/*.spec.ts",
"src/**/*.test.ts",
"jest.config.ts",
"ormconfig.js",
"node_modules"
]
}
module.exports = {
preset: 'ts-jest',
testEnvironment: 'node',
};