import button = require("ui/button"); import {StackLayout} from "ui/layouts/stack-layout"; export class MyButton extends button.Button { public measureCount: number; public arrangeCount: number; measured: boolean; arranged: boolean; measureHeight: number; measureWidth: number; layoutWidth: number; layoutHeight: number; layoutLeft: number; layoutTop: number; _getCurrentMeasureSpecs(): { widthMeasureSpec: number; heightMeasureSpec: number }; } export class MyStackLayout extends StackLayout { public measureCount: number; public arrangeCount: number; public measured: boolean; public arranged: boolean; } export function assertMeasure(btn: MyButton, width: number, height: number, name?: string); export function assertLayout(btn: MyButton, left: number, top: number, width: number, height: number, name?: string): void; export function dip(value: number): number;