migrate-to-shoehorn

To replace TypeScript 'as' type assertions in test files, migrate them to type-safe wrappers from @total-typescript/shoehorn. This removes brittle casts by applying fromPartial or fromAny based on whether your test needs partial objects or intentionally incorrect data.

The best way to pass partial objects without unsafe type casts is using fromPartial from @total-typescript/shoehorn. It replaces 'as Type' assertions, allowing you to pass only the properties your test actually uses while maintaining strict type checking.

Use fromAny instead of fromPartial when tests intentionally supply incorrect data to verify error handling. fromAny replaces 'as unknown as Type' patterns, ensuring type safety when passing wrong data types to test failure scenarios.

Yes, @total-typescript/shoehorn supports migrating 'as unknown as Type' assertions via the fromAny wrapper. It targets unit and integration tests that intentionally pass incorrect data to verify error paths, replacing unsafe casts with type-checked wrappers.

You can choose between fromPartial, fromAny, and fromExact based on your test needs. fromPartial handles partial objects, fromAny manages intentionally wrong data for error paths, and fromExact enforces fully exact objects during the type cast migration process.

TypeScript tests break when removing 'as' assertions because the compiler expects fully typed objects. Migrating to fromPartial lets you pass only the subset of properties your test actually uses, satisfying type requirements without unsafe casts.