assertthat/build/lib/assertions/combined/assertActualIsAnError.d.ts

assertthat provides fluent TDD.

import { AssertionFailed } from '../../errors';
import { Result } from 'defekt';
declare const assertActualIsAnError: <TValue, TError extends Error>(actual: Result<TValue, TError>) => Result<undefined, AssertionFailed>;
export { assertActualIsAnError };