import mocha from 'mocha';
import { Task, Operation } from 'effection';
type TestFunction = (this: mocha.Context, world: Task, scope: Task) => Generator<Operation<any>, any, any>;
interface ItFunction {
    (title: string, fn?: TestFunction): void;
    only(title: string, fn: TestFunction): void;
    skip(title: string, fn: TestFunction): void;
}
export declare const describe: mocha.SuiteFunction;
export declare const beforeEach: (fn: TestFunction) => void;
export declare const afterEach: (fn: TestFunction) => void;
export declare const it: ItFunction;
export declare function captureError(op: Operation<any>): Operation<Error>;
export {};
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