idraw/packages/board/__tests__/scroll.test.ts

import { Board } from '../src';
import { getData } from './data';

describe('@idraw/board', () => {


  document.body.innerHTML = `
    <div id="mount"></div>
  `;
  const opts = {
    width: 600,
    height: 400,
    contextWidth: 600,
    contextHeight: 400,
    devicePixelRatio: 4
  }
  const mount = document.querySelector('#mount') as HTMLDivElement;
  const board = new Board(mount, opts);

  const ctx = board.getContext();
  const data = getData();
  board.clear();
  ctx.clearRect(0, 0, opts.width, opts.height);
  ctx.setFillStyle('#ffffff');
  ctx.fillRect(0, 0, opts.width, opts.height);
  data.elements.forEach(ele => {
    ctx.setFillStyle(ele.desc.color);
    ctx.fillRect(ele.x, ele.y, ele.w, ele.h);
  });

  test('scroll', async () => {  
    
  
    const resultScale =board.scale(2);
    expect(resultScale).toStrictEqual({"position":{"top":0,"bottom":-400,"left":0,"right":-600},"size":{"x":0,"y":0,"w":1200,"h":800}})
  
    const resultX =board.scrollX(-600);
    expect(resultX).toStrictEqual({"position":{"top":0,"bottom":-400,"left":-600,"right":0},"size":{"x":-1200,"y":0,"w":1200,"h":800}})
  
    const resultY =board.scrollY(-400); 
    expect(resultY).toStrictEqual({"position":{"top":-400,"bottom":0,"left":-600,"right":0},"size":{"x":-1200,"y":-800,"w":1200,"h":800}})
  
    board.draw();
  
    const originCtx = board.getOriginContext2D();
    // @ts-ignore;
    const originCalls = originCtx.__getDrawCalls();
    expect(originCalls).toMatchSnapshot();
  
    const displayCtx = board.getDisplayContext2D();
    // @ts-ignore;
    const displayCalls = displayCtx.__getDrawCalls();
    expect(displayCalls).toMatchSnapshot();


    const screenInfo = board.getScreenInfo();
    expect(screenInfo).toStrictEqual({"size":{"x":-1200,"y":-800,"w":1200,"h":800},"position":{"top":-400,"bottom":0,"left":-600,"right":0},"deviceSize":{"x":-2400,"y":-1600,"w":4800,"h":3200},"width":600,"height":400,"devicePixelRatio":4, "canScrollXNext": true, "canScrollXPrev": true, "canScrollYNext": true, "canScrollYPrev": true, });

  });


});