How to use .cjs extension for config when using "module" type in package.json

[paul-uz]

I'm trying to move a load of Lambda functions to MJS, so I have set the type to "module" in package.json.

However, this means the jest-dynamodb-config.js gets interpreted as a module file, buts its commonjs.

I tried changing jest-dynamodb-config.js to jest-dynamodb-config.cjs but it fails with the following:

Error: Jest: Got error running globalSetup - /Users/me/Programming/Work/myproject/node_modules/@shelf/jest-dynamodb/setup.js, reason: Cannot find module '/Users/me/Programming/Work/myproject/jest-dynamodb-config.js'

[brucelay]

Had the same issue, it's covered in the README. My solution:

jest.config.cjs

const {resolve} = require('path');

process.env.JEST_DYNAMODB_CONFIG = resolve(__dirname, './jest-dynamodb-config.cjs');

module.exports = {
  "preset": "@shelf/jest-dynamodb"
}

[paul-uz]

@brucelay that does work, but in the README, the solution description doesn't mention anything about ESM, modules, mjs etc