Can you describe how testing was carried out in your previous projects?

In my previous projects, testing was comprehensive, including several levels:

• Unit tests: testing individual functions and modules using frameworks like Mocha, Jest, or Jasmine. This allowed for quick detection of errors at the code level.

• Integration tests: testing the interaction between components, such as API and database, using test databases and mocks.

• E2E tests: automated testing of user scenarios using tools like Cypress or Selenium.

• Continuous Integration (CI): automatically running tests on each commit or pull request, ensuring code stability.

• Code review and static analysis: complemented testing by helping to find potential errors and improve quality.

Example of a unit test in Node.js with Jest:

const sum = (a, b) => a + b;

test('adds 1 + 2 to equal 3', () => {
  expect(sum(1, 2)).toBe(3);
});

This approach ensured high quality and reliability of applications.