import { LitElement } from '@arcgis/lumina';
/**
 * Wrap a controller in a small component - useful when you are interested in
 * only testing the controller behavior.
 *
 * @example
 * ```ts
 * const testController = (): string => makeController(()=>'a');
 * const { component } = await mount(wrapController(testController));
 * expect(component.controller).toEqual("a");
 * ```
 *
 * @example
 * ```ts
 * class TestController extends Controller {
 *   a = "a";
 * }
 * const {
 *   component: { controller }
 * } = await mount(wrapController(TestController));
 * expect(controller.a).toEqual("a");
 * ```
 */
export declare function wrapController<T>(controller: ((component: LitElement) => T) | (new (component: LitElement) => T), 
/**
 * An optional callback to call right after controller constructor
 */
afterConstruct?: (component: LitElement & {
    controller: T;
}) => Promise<void> | void): typeof LitElement & (new () => LitElement & {
    controller: T;
});