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INTERMEDIATE

Software Testing

Master every layer of software testing — unit, integration, E2E, performance, security, and mutation testing.

12 modules120 lessons

Course Curriculum

Module 1

Unit Testing Fundamentals

Write reliable unit tests with Jest and Vitest. Test isolation, assertions, mocks, and coverage.

8 hoursStart Module

Introduction to Unit Testing and the Testing Pyramid45 min Jest Setup and Test Structure with describe, it, and expect60 min AAA Pattern, Test Naming, and File Organisation45 min Testing Asynchronous Code with async/await, resolves, and rejects60 min Mocking with jest.fn, jest.spyOn, and Module Mocks75 min Code Coverage Analysis with Istanbul and Jest60 min +4 more lessons →

Module 2

Integration Testing

Test modules and services working together. Database integration, API contract testing, and seeding strategies.

7 hoursStart Module

Integration Testing — Why Unit Tests Are Not Enough45 min Testing Express REST APIs with Supertest60 min Database Testing Strategies with Prisma and Test Containers75 min Testing Authentication Middleware and JWT Flows75 min Mocking External Services with MSW and nock60 min Testing NestJS Module Interactions with Test.createTestingModule75 min +4 more lessons →

Module 3

End-to-End Testing

Automate real-browser tests with Playwright and Cypress. Page Object Model, fixtures, and CI integration.

9 hoursStart Module

Introduction to End-to-End Testing with Playwright45 min Playwright Locators — getByRole, getByLabel, getByText, and getByTestId60 min Forms, Clicks, Keyboard, and User Interactions in Playwright60 min Page Object Model — Encapsulating UI Interactions60 min Authentication State Management in E2E Tests60 min Network Interception and API Mocking in Playwright60 min +6 more lessons →

Module 4

Test-Driven Development

Red-Green-Refactor workflow, TDD with React, Node.js, and backend services. Emergent design through tests.

8 hoursStart Module

TDD Philosophy — Why Write Tests Before Code45 min The Red-Green-Refactor Cycle in Practice60 min Writing the First Failing Test — Choosing Where to Start60 min Refactoring with Confidence — Safe Transformation Patterns60 min TDD for Pure Functions and Classes75 min TDD for React Components with Testing Library75 min +4 more lessons →

Module 5

Performance Testing

Load testing with k6 and Lighthouse. Identifying bottlenecks, benchmarking, and setting performance budgets.

6 hoursStart Module

Performance Testing Types and Key Metrics45 min k6 Basics: Virtual Users, Groups, Checks, and Thresholds50 min k6 Scenarios: Executors, Stress, Spike, and Soak Tests55 min k6 Thresholds, Checks, and Grafana Dashboard Integration50 min Data-Driven k6 Tests and Parameterization45 min k6 Extensions and Grafana Cloud Integration45 min +6 more lessons →

Module 6

Security Testing

OWASP Top 10 in practice. Penetration testing basics, SAST, DAST, and integrating security scans into CI.

7 hoursStart Module

Security Testing Overview and OWASP Top 1045 min SQL Injection Detection and Prevention Testing50 min XSS Payload Testing and Content Security Policy Validation50 min Authentication and Authorization Security Testing55 min CORS Misconfiguration and Rate Limiting Testing45 min Dependency Vulnerability Scanning with npm audit and Snyk45 min +6 more lessons →

Module 7

Visual Regression Testing

Catch unintended UI changes with screenshot diffing. Percy, Playwright screenshots, and Storybook integration.

5 hoursStart Module

Visual Regression Testing with Screenshot Comparison45 min Playwright Screenshot Testing Setup and Configuration50 min Handling Dynamic Content in Visual Tests45 min Cross-Browser Visual Testing Strategies45 min Component-Level Visual Regression Tests45 min Dark Mode Visual Testing Patterns40 min +2 more lessons →

Module 8

API Testing Mastery

Test REST and GraphQL APIs with Supertest, Postman, and Hurl. Schema validation and contract testing.

6 hoursStart Module

REST API Testing Fundamentals with Supertest45 min Postman and Newman for API Testing45 min Testing API Authentication and Authorization Headers50 min Advanced Supertest: Interceptors, Guards, and Middleware Testing50 min API Mocking and Stubbing with MSW and NestJS TestModule45 min API Contract Testing with OpenAPI Spec Validation50 min +6 more lessons →

Module 9

Mutation Testing

Measure test suite effectiveness with mutation testing. Stryker, mutation score, and improving coverage quality.

4 hoursStart Module

Mutation Testing: Why Code Coverage Lies45 min Stryker Mutator: Setup, Configuration, and First Run50 min Reading and Interpreting Stryker Mutation Reports45 min Reading and Interpreting Mutation Reports40 min Strategies to Kill Surviving Mutants50 min Cost-Benefit Analysis and Where to Apply Mutation Testing45 min

Module 10

Accessibility Testing

Automated and manual accessibility audits. axe-core, WAVE, keyboard testing, and WCAG 2.1 compliance.

5 hoursStart Module

WCAG 2.1 AA Overview and Accessibility Testing Strategy45 min Automated Accessibility Testing with axe-core and jest-axe45 min Keyboard Navigation Testing with Playwright45 min Screen Reader Compatibility Testing Concepts45 min Color Contrast and Visual Accessibility Testing40 min Form Accessibility Testing: Labels, Errors, and Hints45 min +4 more lessons →

Module 11

Mobile App Testing

Test React Native and Flutter apps. Detox, Appium, device farms, and mobile-specific test strategies.

6 hoursStart Module

Mobile Testing Overview: Detox vs Appium vs Native Tools45 min Detox Setup and First React Native Test55 min Testing User Interactions on Mobile: Tap, Swipe, Scroll50 min Testing Navigation Flows in React Native50 min Testing Forms and Input on Mobile45 min Testing Offline Mode and Network Conditions50 min +4 more lessons →

Module 12

Contract Testing

Consumer-driven contract testing with Pact. Microservice testing strategies and schema evolution.

5 hoursStart Module

Consumer-Driven Contract Testing Concepts45 min Writing Pact Consumer Tests in TypeScript55 min Pact Provider Verification Setup50 min Pact Broker: Publishing and Sharing Contracts45 min Contract Testing in CI/CD Pipelines50 min Bi-Directional Contract Testing50 min +2 more lessons →