What problem does it solve?
This Skill eliminates the guesswork and fragility in software development by enforcing Test-Driven Development (TDD). It ensures every piece of code is verified by a failing test before implementation, preventing bugs, simplifying refactoring, and building a robust, trustworthy codebase. No more "it works on my machine" or untested edge cases.
Core Features & Use Cases
- Red-Green-Refactor Cycle: Guides you through the iterative process of writing a failing test (Red), writing minimal code to pass it (Green), and then cleaning up your code (Refactor).
- Mandatory Failure Verification: Crucially, it requires you to witness a test fail for the expected reason before writing any implementation, proving the test's validity and preventing false positives.
- Bug Prevention & Regression Safety: By building a comprehensive suite of automated tests from the ground up, this Skill helps catch bugs early in the development cycle and ensures that future changes don't inadvertently break existing functionality.
Quick Start
To implement a new feature using TDD, first, describe the desired behavior in a new test file. For example:
test('should correctly calculate total amount', () => {
expect(calculateTotal(items)).toBe(expectedTotal);
});
Then, run this test and ensure it fails as expected before writing any implementation code.
