Dr. Axel Rauschmayer • 2/24/2025

Testing types in TypeScript

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This technical article explains methods for testing complicated TypeScript types, focusing on type-level assertions. It demonstrates how to check if two types are equal, discusses challenges with naive implementations, and shows how to disable distribution in conditional types using the asserttt npm package as both a tool and a learning example.

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#TypeScript #type system #generic types
Testing types in TypeScript

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