import { ElementHandle } from "puppeteer";
export declare function e2eTest(html: string): Promise<void>;
export declare function isFocused(element: ElementHandle): Promise<boolean>;
export declare const getAttribute: (element: ElementHandle, attribute: string) => Promise<string | null>;
export declare const getProperty: <T extends Element>(element: ElementHandle<T>, property: keyof T) => Promise<string | null>;
export declare class EventSpy implements EventSpy {
    eventName: string;
    events: Event[];
    private cursor;
    private queuedHandler;
    constructor(eventName: string);
    get length(): number;
    get firstEvent(): Event;
    get lastEvent(): Event;
    next(): Promise<{
        done: boolean;
        value: Event;
    }>;
    push(ev: Event): void;
}
export declare function addE2EListener(elementHandle: ElementHandle, eventName: string, callback: (ev: any) => void): Promise<void>;
export declare function spyOnEvent(elementHandle: ElementHandle, eventName: string): Promise<EventSpy>;