Testing

2 articles in Testing

Red-Green-Refactor cycle diagram showing TDD as a design feedback loop that shapes architecture before implementation

TDD Is a Design Tool, Not a Testing Strategy

Most teams treat TDD as a way to verify code works. That misses the point entirely. TDD is a design tool — Red-Green-Refactor shapes architecture before implementation, and the failing test is a specification, not a verification step.

By Shivani Sutreja•April 7, 2026

Mutation testing revealing decorative tests — green checkmarks hiding real quality gaps

Code Quality, Testing

88% of Your Tests Are Decorative: The Mutation Testing Wake-Up Call

Most test suites look healthy — high coverage, all green. But run mutation testing and you'll discover that 80-90% of tests would still pass even if you deleted the code they claim to test. Here's what decorative tests are, why they're dangerous, and how to fix them.

By Chirag•March 31, 2026