How to use mocha and jest with typescript without conflicts?

@lew 

To use Mocha and Jest with TypeScript without conflicts, you can follow these steps:

1. Set up your project using TypeScript by running npm install --save-dev typescript @types/node.
2. Configure TypeScript by creating a tsconfig.json file in the root of your project with the following settings:

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{
  "compilerOptions": {
    "target": "es6",
    "module": "commonjs",
    "strict": true,
    "esModuleInterop": true
  }
}

1. Install Mocha and Chai by running npm install --save-dev mocha chai @types/mocha @types/chai.
2. Create a folder for your tests (e.g., tests) and write your Mocha tests in TypeScript files.
3. Install Jest by running npm install --save-dev jest ts-jest @types/jest.
4. Create a folder for your Jest tests (e.g., __tests__) and write your Jest tests in TypeScript files.
5. Configure Jest by adding the following settings to your package.json:

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"jest": {
  "transform": {
    "^.+\.tsx?$": "ts-jest"
  },
  "testRegex": "(/__tests__/.*|(\.|/)(test|spec))\.(jsx?|tsx?)$",
  "moduleFileExtensions": ["ts", "tsx", "js", "jsx", "json", "node"]
}

1. Run your Mocha tests using the mocha command and run your Jest tests using the jest command.

By following these steps, you should be able to use Mocha and Jest with TypeScript in your project without conflicts.