Test-Driven Development

Definitions

1. A software development methodology where you write a failing test before writing the production code that makes it pass. The cycle is red (fail), green (pass), refactor — repeated for each small increment of functionality.

   In plain English: Writing the test for your code before you write the actual code, so you always know exactly what your code is supposed to do.

   Example: "TDD felt slow at first, but after six months the codebase has almost zero regressions."

Related Terms

• Code Coverage
• Testing
• Unit Testing
• Mutation Testing
• Shift Left
• Property-Based Testing
• Golden File Test
• Test Fixture
• Test Double
• RED Method
• Acceptance Testing
• Assertion
• BDD
• Benchmark Suite
• Breakpoint
• Code Review Bot
• End-to-End Test
• TDD