assertthat/build/lib/assertions/forResults/assertResultIsAnErrorWithMessage.d.ts

assertthat provides fluent TDD.

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