Comprehensive Testing Strategy for Angular Ecommerce App Using Cypress

🧪 Introduction to Testing Strategy

Testing is crucial for building robust applications. This blog dives deep into testing approaches for our Angular ecommerce app, with special focus on Cypress for end-to-end testing.

1. 🧪 Unit Testing

• Tools: Jasmine & Karma
• Scope: Individual components, services, pipes, and utilities
• Best Practices:
  • Mock dependencies (e.g., HttpClient, NgRx Store)
  • Write clear, isolated tests
  • Aim for high coverage of business logic
  • Avoid testing Angular internals (trust the framework)

2. 🔗 Integration Testing

• Utilize Angular TestBed to test module interaction
• Test NgRx store: actions, reducers, selectors
• Validate multi-component behavior and shared services

3. 🌐 End-to-End (E2E) Testing with Cypress

✅ Why Cypress?

• Fast, real-browser testing environment
• Clean syntax and intuitive debugging
• Supports:
  • Network stubbing
  • Time travel and snapshots
  • Parallelization & CI-friendly

🧪 Key E2E Scenarios to Cover

🧾 Sample Cypress Test Snippet

describe("User Login Flow", () => {
  it("allows a user to login successfully", () => {
    cy.visit("/login");
    cy.get("input[name=email]").type("test@example.com");
    cy.get("input[name=password]").type("password123");
    cy.get("button[type=submit]").click();
    cy.url().should("include", "/dashboard");
    cy.contains("Welcome, Test User");
  });
});

4. 🚦 Performance Testing (Overview)

• Use Lighthouse or WebPageTest to evaluate performance
• Automate with CI for baseline comparison
• Track metrics like FCP, LCP, TTI

5. 🛡️ Security Testing (Basics)

• Validate AuthGuard and role-based access with E2E tests

• Use static analysis tools like ESLint + security plugins

• Run audits using:

  • OWASP ZAP
  • Google Lighthouse (Security Tab)
  • Dependency vulnerability scanners

✅ Summary

A comprehensive test strategy includes:

A reliable and well-tested Angular application ensures faster releases, lower bugs, and higher customer confidence.