import { assertRejects } from "https://deno.land/x/pogo@v0.6.0/example/simple-server/dev-dependencies.ts";
Executes a function which returns a promise, expecting it to reject. 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.
Parameters
ErrorClass: new (...args: any[]) => E