First things first, let's make sure we've got all the testing tools we need. Common ones are Jest for JavaScript testing and Cypress for end-to-end testing. WeWeb supports these and maybe a few others.

Create a special folder for your WeWeb project if you haven't already. Then, initialize it with:

npm init

Next, install the testing libraries:

npm install jest cypress --save-dev

Let's set up Jest by creating a jest.config.js file:

module.exports = {
  testEnvironment: 'node',
};

For Cypress, you'll need a cypress.json file in the root of your project:

{
  "baseUrl": "http://localhost:3000",
  "integrationFolder": "cypress/integration",
  "supportFile": "cypress/support/index.js"
}

Time to write some tests! For Jest, put your tests in a __tests__ directory:

// File: __tests__/example.test.js
test('should perform example test', () => {
  expect(true).toBe(true);
});

For Cypress, your tests go in the cypress/integration directory:

// File: cypress/integration/example_spec.js
describe('Example Test', function() {
  it('Visits the WeWeb page and checks for text', function() {
    cy.visit('/');
    cy.contains('Welcome to WeWeb');
  });
});

Add some scripts to your package.json to run the tests:

"scripts": {
  "test": "jest",
  "cypress:open": "cypress open",
  "cypress:run": "cypress run"
}

Now, let's run those tests! Open your terminal and type:

For Jest:

npm test

For Cypress:

npm run cypress:open

Or if you prefer headless mode:

npm run cypress:run

Finally, let's integrate this with a CI service like GitHub Actions or GitLab CI. Create a YAML file (e.g., .github/workflows/ci.yml):

name: CI

on: [push, pull_request]

jobs:
  build:
    runs-on: ubuntu-latest

    strategy:
      matrix:
        node-version: [14, 16]

    steps:
    - uses: actions/checkout@v2
    - name: Use Node.js ${{ matrix.node-version }}
      uses: actions/setup-node@v1
      with:
        node-version: ${{ matrix.node-version }}
    - run: npm install
    - run: npm test
    - run: npm run cypress:run

And there you have it! Your WeWeb project is now set up for automated testing.