/**
 * Asserts that a Promise has rejected, returning a resolved Promise containing the error.
 * If the promise does not reject returns a rejected Promise.
 *
 * @name rejects<Err extends Error>(promise: Promise<any>): Promise<Err>
 * @example
 * import { rejects } from '@typed/assertions'
 *
 * rejects(Promise.reject(new Error('foo))) // => resolved Promise containing Error('foo')
 * rejects(Promise.resolve()) // => rejected Promise
 */
export declare const rejects: <Err extends Error = Error>(promise: Promise<any>) => Promise<Err>;