Free PDF · 7 parts

Hands-On Testing, seven real tests in one PDF.

Build and run a UI test with Playwright, API tests with pytest, a security scan with OWASP ZAP and a load test with k6. Every command and every line of output is real.

• 7 parts, one small API built, tested, scanned and load-tested end to end
• Playwright in Python: locators, traces, a failure read line by line
• pytest + requests: functional, negative and authorisation tests
• OWASP Top 10 (2025) explained, then a ZAP scan that finds a planted injection
• k6: a load test that passes and a stress test that finds the knee

What's inside

1. 1UI testing explained: what it is, how it works, and Selenium vs Playwright vs Cypress
2. 2Your first Playwright test in 15 minutes (Python)
3. 3API testing explained: what it is, why test the API before the UI, and what to check
4. 4Your first API tests in 15 minutes (Python, pytest and requests)
5. 5Security testing basics: the OWASP Top 10 (2025) in plain language
6. 6Your first security scan with OWASP ZAP (hands-on)
7. 7Your first load test with k6 (hands-on): find where your API slows down

Every part is also free to read on the blog.

Also free: Testing Basics, from “what is a test?” to testing in agile and ci/cd, in plain language, with diagrams and real code. Get that PDF