/// <reference types="jasmine" />
import { Observable } from 'rxjs';
import { ObservableEvent } from '../lib/observable-events';
export declare type ToBeObservable<T> = (expected: ObservableEvent<T | jasmine.Any>[], actual?: Observable<T>) => boolean;
declare global {
    namespace jasmine {
        interface Matchers<T> {
            toBeObservable: T extends Observable<infer U> ? ToBeObservable<U> : never;
        }
    }
    namespace jest {
        interface Matchers<R> {
            toBeObservable: R extends Observable<infer U> ? ToBeObservable<U> : never;
        }
    }
}
export declare const toBeObservable: ToBeObservable<unknown>;