text: const test = require('tap').test;
  const MouseWheel = require('../../src/io/mouseWheel');
  const Runtime = require('../../src/engine/runtime');
  
  test('spec', t => {
      const rt = new Runtime();
      const mw = new MouseWheel(rt);
  
      t.type(mw, 'object');
      t.type(mw.postData, 'function');
      t.end();
  });
  
  test('blocks activated by scrolling', t => {
      let _startHatsArgs;
      const rt = {
          startHats: (...args) => {
              _startHatsArgs = args;
          }
      };
      const mw = new MouseWheel(rt);
  
      _startHatsArgs = null;
      mw.postData({
          deltaY: -1
      });
      t.strictEquals(_startHatsArgs[0], 'event_whenkeypressed');
      t.strictEquals(_startHatsArgs[1].KEY_OPTION, 'up arrow');
  
      _startHatsArgs = null;
      mw.postData({
          deltaY: +1
      });
      t.strictEquals(_startHatsArgs[0], 'event_whenkeypressed');
      t.strictEquals(_startHatsArgs[1].KEY_OPTION, 'down arrow');
  
      _startHatsArgs = null;
      mw.postData({
          deltaY: 0
      });
      t.strictEquals(_startHatsArgs, null);
  
      t.end();
  });
  