migrate-to-shoehorn

You can replace unsafe type assertions in TypeScript test files by using the shoehorn library, which provides type-safe alternatives like `fromPartial` for partial mock data and `fromAny` for intentional error testing.

The best way to refactor `as unknown as` casts in unit testing is using the `@total-typescript/shoehorn` package, replacing them with `fromAny` to safely handle intentionally incorrect data required for testing error states.

Yes, replacing `as` assertions with shoehorn requires installing the `@total-typescript/shoehorn` package and executing grep-based search patterns to identify and update target test files containing large object mocks.

Brittle type assertions cause hidden runtime errors in test suites because `as` bypasses TypeScript's type checking, allowing malformed data to slip through. `shoehorn` solves this by enforcing type safety while reducing boilerplate.

Use `fromPartial` during type-safety refactoring for partial object definitions satisfying TypeScript requirements, and use `fromAny` when your tests require intentionally incorrect data for testing error states.

Yes, you can automate finding and replacing type assertions across your test directory by executing grep-based search patterns to locate `as` syntax and migrating them to shoehorn's type-safe functions.