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Documentation Course

Master JavaScript Testing

From Unit Tests to End-to-End Mastery

A premium, industry-ready curriculum teaching the complete JavaScript testing pyramid. Learn to build bulletproof test suites using Jest, React Testing Library, Supertest, and Playwright. Covers everything from mocking databases to constructing robust CI/CD deployment pipelines.

7 modulesIntermediate to AdvancedWritten / Documentation-style7 of 7 modules live

How to use this course

This course works as both a sequential read and a standalone reference. Read front-to-back to build a complete mental model of Postgres under production load. Or jump to any module when you hit a specific incident — VACUUM bloat, a lock queue outage, a query regression after a data load.

Total reading time

~15 hrs

across 7 modules

Built from

20–30 TB

live blockchain indexer

Prerequisite

Zero SQL to production internals

Beginner through senior engineer

Phase 1 — Foundation

Absolute basics · No prior knowledge assumed

1 modules

Testing Foundations

Why testing matters, the testing pyramid, the AAA pattern, TDD vs BDD, and coverage metrics.

Phase 2 — Practitioner

Production patterns · Real application architecture

3 modules

Configuration, matchers, async testing, mocking, React Testing Library, snapshot testing, and coverage analysis.

Backend Testing with Node.js

Testing Express APIs, Supertest fundamentals, database testing strategies, mocking repositories/services, Sinon, and Mocha/Chai for legacy projects.

BDD with Cucumber

Gherkin syntax, step definitions, feature files, and bridging the communication gap with stakeholder collaboration.

Phase 3 — Architect

Engine internals · High-throughput systems · Distributed architecture

3 modules

End-to-End Testing

Playwright (Primary), Cypress (Comparison), authentication flows, network interception, flaky test prevention, and CI-friendly test architecture.

CI/CD & Quality Gates

GitHub Actions, coverage reports, pull request validation, and zero-downtime deployment pipelines.

Capstone Project

Build and test a production-style authentication application (Next.js + Express API) with Jest, RTL, Supertest, Playwright, and GitHub Actions.