Testing and Quality

Integration Testing (Required)

• Frontend: Cypress integration tests are required.
• Backend: Jest integration tests are required.

Example (Cypress):

describe('Login', () => {
  it('logs in with valid credentials', () => {
    cy.visit('/login');
    cy.get('input[name=email]').type('user@example.com');
    cy.get('input[name=password]').type('password123');
    cy.get('button[type=submit]').click();
    cy.url().should('include', '/dashboard');
  });
});

Unit Testing

• Frontend unit tests are encouraged but not required.
• Backend unit tests are expected for complex services or functions.

Example (Jest):

describe('calculateDiscount', () => {
  it('returns the correct percentage', () => {
    expect(calculateDiscount({price: 100, percent: 10})).toBe(10);
  });
});

Code Quality Heuristics

• Avoid nested conditionals when early returns can solve it.
• Keep methods short; avoid very long classes or functions.
• Keep log messages consistent across the codebase.
• Avoid repeated code blocks; extract common logic.
• Avoid unnecessary comments that get out of date.

Maintenance

Keep dependencies updated.