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• Avoid unnecessary comments that get out of date.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.