import { assertThrows } from "https://deno.land/std@0.112.0/testing/asserts.ts";
Executes a function, expecting it to throw. If it does not, then it throws. An error class and a string that should be included in the error message can also be asserted. Or you can pass a callback which will be passed the error, usually to apply some custom assertions on it.
Parameters
optional
errorClassOrCallback: Constructor | ((e: Error) => unknown)