import type { Awaitable } from "../../libs/awaitable/mod.ts";
/**
 * Check if a closure throws
 * @param closure closure to check
 * @returns true if the closure throwed
 */
export declare function throws(closure: () => unknown): boolean;
/**
 * Check if an async closure rejects (throws)
 * @param closure async closure to check
 * @returns a promise that returns true if the closure rejected
 */
export declare function rejects(closure: () => Awaitable<unknown>): Promise<boolean>;