Category · 180 articles

Testing & Quality

Unit testing with xUnit: real-world lessons and examples

.NET & ASP.NET CORE · DAY 052

Unit testing with xUnit: real-world lessons and examples

Expona Admin · Oct 27, 2026 · 7 min read

Integration tests with WebApplicationFactory in practice

.NET & ASP.NET CORE · DAY 053

Integration tests with WebApplicationFactory in practice

Expona Admin · Oct 27, 2026 · 6 min read

Testcontainers for real databases in .NET & ASP.NET Core

.NET & ASP.NET CORE · DAY 054

Testcontainers for real databases in .NET & ASP.NET Core

Expona Admin · Oct 27, 2026 · 8 min read

Mocking with NSubstitute: a hands-on guide for engineers

.NET & ASP.NET CORE · DAY 055

Mocking with NSubstitute: a hands-on guide for engineers

Expona Admin · Oct 27, 2026 · 9 min read

Architecture tests in .NET: patterns, pitfalls and fixes

.NET & ASP.NET CORE · DAY 095

Architecture tests in .NET: patterns, pitfalls and fixes

Expona Admin · Oct 27, 2026 · 6 min read

Unit testing NestJS services: what developers should know

NESTJS · DAY 050

Unit testing NestJS services: what developers should know

Expona Admin · Oct 27, 2026 · 8 min read

Mocking providers cleanly: a NestJS guide for developers

NESTJS · DAY 051

Mocking providers cleanly: a NestJS guide for developers

Expona Admin · Oct 27, 2026 · 8 min read

E2E tests with Supertest: NestJS lessons from production

NESTJS · DAY 052

E2E tests with Supertest: NestJS lessons from production

Expona Admin · Oct 27, 2026 · 9 min read

Testcontainers for Node: NestJS best practices explained

NESTJS · DAY 053

Testcontainers for Node: NestJS best practices explained

Expona Admin · Oct 27, 2026 · 9 min read

Testing React the right way: what developers should know

REACT & NEXT.JS · DAY 062

Testing React the right way: what developers should know

Expona Admin · Oct 27, 2026 · 10 min read

Testing custom hooks: a practical React & Next.js guide

REACT & NEXT.JS · DAY 063

Testing custom hooks: a practical React & Next.js guide

Expona Admin · Oct 27, 2026 · 9 min read

End-to-end tests with Playwright: lessons from production

REACT & NEXT.JS · DAY 064

End-to-end tests with Playwright: lessons from production

Expona Admin · Oct 27, 2026 · 9 min read

Mock APIs with MSW: a React & Next.js guide for developers

REACT & NEXT.JS · DAY 065

Mock APIs with MSW: a React & Next.js guide for developers

Expona Admin · Oct 27, 2026 · 7 min read

Dates and time zones in the UI: best practices explained

REACT & NEXT.JS · DAY 069

Dates and time zones in the UI: best practices explained

Expona Admin · Oct 27, 2026 · 7 min read

A/B testing without layout shift: lessons from production

REACT & NEXT.JS · DAY 089

A/B testing without layout shift: lessons from production

Expona Admin · Oct 27, 2026 · 8 min read

Testing Kafka applications: patterns, pitfalls and fixes

KAFKA & WEBSOCKETS · DAY 044

Testing Kafka applications: patterns, pitfalls and fixes

Expona Admin · Oct 27, 2026 · 10 min read

Load testing WebSockets: real-world lessons and examples

KAFKA & WEBSOCKETS · DAY 090

Load testing WebSockets: real-world lessons and examples

Expona Admin · Oct 27, 2026 · 8 min read

Test reconnect storms for Kafka & WebSockets developers

KAFKA & WEBSOCKETS · DAY 091

Test reconnect storms for Kafka & WebSockets developers

Expona Admin · Oct 27, 2026 · 14 min read

Interface segregation and dependency inversion explained

DESIGN PATTERNS IN PRACTICE · DAY 006

Interface segregation and dependency inversion explained

Expona Admin · Oct 27, 2026 · 8 min read

Testing patterns: a Design Patterns guide for developers

DESIGN PATTERNS IN PRACTICE · DAY 096

Testing patterns: a Design Patterns guide for developers

Expona Admin · Oct 27, 2026 · 7 min read