Blog

Thoughts on AI, software, and life. Short notes and long-form writing.

Scrapy Review: Engine, Scheduler, Downloader, Spider, Pipeline, and Selectors

Scrapy is not just an HTML parser. It is a full crawling framework for request scheduling, downloading, parsing, pipelines, and middleware.

Software EngineeringMay 23, 2026

Software Engineering Review: SDLC, DevOps, OOP, SOLID, Design Patterns, and Code Quality

Software EngineeringDevOpsDesign Patterns

Software engineering is not only about writing code. It also includes requirements, design, testing, deployment, maintenance, and collaboration.

TestingMay 23, 2026

Jest and Supertest Review: Unit Tests, Mocks, Async Assertions, and API Integration Tests

JestSupertestMocking+1

Jest is useful for functions, service layers, React components, and async logic. Supertest is focused on HTTP API testing.

TestingMay 23, 2026

pytest, Robot Framework, and Playwright: Fixtures, Keyword-Driven Testing, and E2E Tests

pytestRobot FrameworkPlaywright+1

These tools solve different testing problems. pytest is a Python testing framework, Robot Framework is keyword-driven automation, and Playwright is modern web E2E testing.

TypeScriptMay 23, 2026

TypeScript Special Types: any, unknown, void, never, null, and undefined

TypeScriptType SafetyType Narrowing

Some TypeScript types are easy to confuse. Understanding their boundaries is essential for writing safer code.