Social Media Ideas for Mutation Testing

Negative Testing

Tests That Survive Change

How to write Ruby tests that survive refactoring: what to test, what to ignore, and how to keep doubles from going stale.

Mutation Testing With PIT in Java: The Coverage Metric You’re Ignoring That Actually Measures Test Quality

Line coverage tells you which code ran. Mutation testing tells you whether your tests would actually catch a bug. Here is how to close that gap with PITest — the fastest mutation t...

TWIQ 139 - Models and Negative Testing

Advanced Mocking Strategies: Mastering Test Doubles & Behavior Verification

Every experienced developer has been there: a test suite that passes on your machine but fails in CI, a green build that hides a broken integration, or a test that's so tightly cou...

Test Oracle

Equivalence partitioning

The test suite as a regression sensor

Birgitta Böckeler finishes her post on sensors for coding agents by examining the role of a test suite as a regression sensor, focusing on the role mutation testing can...

The test continuity test is for your tool stack too

Painfully Simple Test Case Mistakes That Are Easy To Fix

Originally appeared on The Rails Tech Debt Blog.Writing effective test cases is as important as writing the business logic in your application. This blog post dives into the simple...

The continuity test is for your tool stack too

My MCP server had 32 green tests. Not one of them had ever called a tool.

For weeks my CI badge was green and I believed it. Safari MCP is an open-source tool that lets an AI coding agent drive a real, logged-in Safari — click, type, read the page, swit...

Painfully Simple Test Case Mistakes That Are Easy to Fix

Writing effective test cases is as important as writing the business logic in your application. In this article Rishi dives into the simple yet effective ways developers can use wh...

TypeMock Launches Test Review to Identify Duplicate, Fragile and Ineffective unit Tests

Unit testing solutions provider TypeMock today launched Test Review, a new offering designed to help development teams evaluate whether AI-generated unit tests are delivering value...

Boundary testing

How I Think About Tests: Skips

Originally appeared on Rails at Scale. If you’ve ever written a test for your code, you’re probably familiar with typical test framework methods: test/it to define test cases, and...

Kotlin

🧪 JUnit Test Isolation — One Small Detail That Changed Everything Today I learned that JUnit creates a brand-new instance of your test class for every "@test" method by defau...

Interruption testing

The Ahh Test Summary

AI Test Strategy

The Uggh Test

Cursor пишет вам unit‑тесты за минуту. 5 паттернов, на которых эти тесты пропустят любой баг

Cursor, Copilot и другие AI‑инструменты обещают быстро закрыть рутину с unit‑тестами: сгенерировать кейсы, расставить моки, добавить ассерты и поднять покрытие. Но зелёные тесты ещ...

Tester

Test the numbers, a cheat sheet