Function expectToFail

tests/e2e/utils/utils.ts:6–19

(fn: () => Promise<any>, errorMessage?: string)

import path from 'node:path';

export function expectToFail(fn: () => Promise<any>, errorMessage?: string): Promise<Error> {
  return fn().then(
    () => {
      const functionSource = fn.name || (<any>fn).source || fn.toString();
      const errorDetails = errorMessage ? `\n\tDetails:\n\t${errorMessage}` : '';
      throw new Error(
        `Function ${functionSource} was expected to fail, but succeeded.${errorDetails}`,
      );
    },
    (err) => {
      return err instanceof Error ? err : new Error(err);
    },
  );
}

export async function mktempd(prefix: string, tempRoot?: string): Promise<string> {
  return realpath(await mkdtemp(path.join(tempRoot ?? tmpdir(), prefix)));