Agent Skills
› FradSer/dotclaude
› migrate-to-shoehorn
migrate-to-shoehorn
GitHub将测试代码中的 TypeScript as 类型断言迁移至 @total-typescript/shoehorn，通过 fromPartial/fromAny 等函数实现更安全的类型处理。
Trigger Scenarios
替换测试中的 as 断言
使用 shoehorn 库
Install
npx skills add FradSer/dotclaude --skill migrate-to-shoehorn -g -y
SKILL.md
Frontmatter
{
"name": "migrate-to-shoehorn",
"description": "Migrate test files from `as` type assertions to @total-typescript\/shoehorn. Use when user mentions shoehorn, wants to replace `as` in tests, or needs partial test data."
}
Migrate to Shoehorn
Why shoehorn?
shoehorn lets you pass partial data in tests while keeping TypeScript happy. It replaces as assertions with type-safe alternatives.
Test code only. Never use shoehorn in production code.
Problems with as in tests:
- Trained not to use it
- Must manually specify target type
- Double-as (
as unknown as Type) for intentionally wrong data
Install
npm i @total-typescript/shoehorn
Migration patterns
Large objects with few needed properties
Before:
type Request = {
body: { id: string };
headers: Record<string, string>;
cookies: Record<string, string>;
// ...20 more properties
};
it("gets user by id", () => {
// Only care about body.id but must fake entire Request
getUser({
body: { id: "123" },
headers: {},
cookies: {},
// ...fake all 20 properties
});
});
After:
import { fromPartial } from "@total-typescript/shoehorn";
it("gets user by id", () => {
getUser(
fromPartial({
body: { id: "123" },
}),
);
});
as Type → fromPartial()
Before:
getUser({ body: { id: "123" } } as Request);
After:
import { fromPartial } from "@total-typescript/shoehorn";
getUser(fromPartial({ body: { id: "123" } }));
as unknown as Type → fromAny()
Before:
getUser({ body: { id: 123 } } as unknown as Request); // wrong type on purpose
After:
import { fromAny } from "@total-typescript/shoehorn";
getUser(fromAny({ body: { id: 123 } }));
When to use each
| Function | Use case |
|---|---|
fromPartial() |
Pass partial data that still type-checks |
fromAny() |
Pass intentionally wrong data (keeps autocomplete) |
fromExact() |
Force full object (swap with fromPartial later) |
Workflow
-
Gather requirements - ask user:
- What test files have
asassertions causing problems? - Are they dealing with large objects where only some properties matter?
- Do they need to pass intentionally wrong data for error testing?
- What test files have
-
Install and migrate:
- Install:
npm i @total-typescript/shoehorn - Find test files with
asassertions:grep -r " as [A-Z]" --include="*.test.ts" --include="*.spec.ts" - Replace
as TypewithfromPartial() - Replace
as unknown as TypewithfromAny() - Add imports from
@total-typescript/shoehorn - Run type check to verify
- Install:
Version History
- 6f2a0b2 Current 2026-08-20 11:00
