Function assertIsIntString

assertIsIntString(
input: unknown,
error?: string | Error,
): asserts input is `${number}` | `${bigint}`
Assert that input is a string representing an integer.
Parameters
- input: unknown
- error: string | Error = 'input is not an integer string'
Returns asserts input is `${number}` | `${bigint}`
Example
```
assertIsIntString('42'); // does not throw
assertIsIntString('42.5'); // throws TypeError: input is not an integer string
```
- Defined in src/assertion/assertIsIntString.ts:16