Type Testing

Test your .d.ts type declarations to ensure they work correctly for consumers.

Quick Start

1. Create a test-d/ directory
2. Write .test-d.ts files
3. Run tspub test-types

tspub test-types

Why Test Types?

Type declarations can break independently of runtime code:

• A refactor might widen a return type to any
• A generic might lose its constraint
• An overload might be removed

Type tests catch these regressions at CI time.