import { ElementFinder } from "../wdio";
import { Widget } from "../widgets";
import { BasePage } from "../pages";
export declare class ScreenshotUtility {
    private static basePath;
    private static pixelTolerance;
    private static imageMatchingThreshold;
    static setBasePath(basePath: string): void;
    static setPixelTolerance(pixelTolerance: number): void;
    static setImageMatchingThreshold(imageMatchingThreshold: number): void;
    static expectPageScreenshot(page: BasePage, fileName: string, pageDescriptiveName: string): Promise<void>;
    static expectWidgetScreenshot(widget: Widget, fileName: string, widgetDescriptiveName: string): Promise<void>;
    static expectScreenshot(element: ElementFinder, fileName: string, elementDescriptiveName: string): Promise<void>;
    private static compareImageFiles;
}