import { Rect } from '../dom/rect';
export declare class RectMock extends Rect implements DOMRect {
    constructor();
    constructor(x: number, y: number, width: number, height: number);
    toJSON(): DOMRect;
}
export declare class IntersectionObserverMock implements IntersectionObserver {
    callback: IntersectionObserverCallback;
    constructor(callback: IntersectionObserverCallback);
    root: Document | Element | null;
    rootMargin: string;
    get thresholds(): number[];
    takeRecords(): IntersectionObserverEntry[];
    private _onObserve;
    observe(element: Element): void;
    unobserve(element: Element): void;
    disconnect(): void;
    static createEntry(target: Element, init: Partial<IntersectionObserverEntry>): IntersectionObserverEntry;
    static trigger($el: Element, detail: Partial<IntersectionObserverEntry> | Partial<IntersectionObserverEntry>[]): void;
    static mock(): void;
    static unmock(): void;
    static get lastInstance(): IntersectionObserverMock;
}