mock.ts

// https://github.com/total-typescript/shoehorn
export type NoInfer<T> = [T][T extends any ? 0 : never];
export type DeepPartial<T> = T extends (...args: any[]) => unknown
  ? T | undefined
  : T extends object
    ? T extends ReadonlyArray<infer ItemType>
      ? ItemType[] extends T
        ? readonly ItemType[] extends T
          ? ReadonlyArray<DeepPartial<ItemType | undefined>>
          : Array<DeepPartial<ItemType | undefined>>
        : DeepPartialObject<T>
      : DeepPartialObject<T>
    : T;

export type DeepPartialObject<ObjectType extends object> = {
  [KeyType in keyof ObjectType]?: DeepPartial<ObjectType[KeyType]>;
};

export function mock<T>(mock: DeepPartial<NoInfer<T>>): T {
  return mock as T
}