/// <reference types="jest" />
import { TestMessages, SubscriptionLog } from '../rxjs/types';
export declare const customTestMatchers: jest.ExpectExtendMap;
declare global {
    namespace jest {
        interface Matchers<R extends void | Promise<void>> {
            toBeNotifications(notifications: TestMessages): R;
            toBeSubscriptions(subscriptions: SubscriptionLog[]): R;
            toHaveEmptySubscriptions(): R;
        }
    }
}