Add Jest for unit testing TypeScript code

[RoshanPShetty]

Background

Unit testing is a crucial part of maintaining code quality and preventing regressions. Adding Jest, a popular JavaScript testing framework, to our boilerplate will provide a solid foundation for writing and running tests.

Objective

Integrate Jest into the ChromeTS Launchpad boilerplate to enable unit testing for TypeScript code.

Tasks

• [ ] Install necessary packages:

  npm install --save-dev jest @types/jest ts-jest

• [ ] Create a Jest configuration file (jest.config.js) in the project root:

  module.exports = {
  preset: 'ts-jest',
  testEnvironment: 'node',
  testMatch: ['**/__tests__/**/*.ts', '**/?(*.)+(spec|test).ts'],
  moduleFileExtensions: ['ts', 'js', 'json', 'node'],
  };

• [ ] Add test scripts to package.json:

  "scripts": {
  "test": "jest",
  "test:watch": "jest --watch"
  }

• [ ] Create a sample test file (e.g., src/__tests__/sample.test.ts) with a basic test:

  describe('Sample Test', () => {
  it('should pass', () => {
    expect(true).toBe(true);
  });
  });

• [ ] Update the README.md with information about running tests.
• [ ] (Optional) Set up GitHub Actions to run tests automatically on push and pull requests.

Resources

• Jest Documentation
• ts-jest

Notes

• Feel free to add more sample tests or suggest improvements to the testing setup.
• If you have any questions or need clarification, please ask in the comments!

[himanshuraimau]

can i work on this?