text: // DO NOT EDIT! This test has been generated by tools/gentest.py.
  // OffscreenCanvas test in a worker:2d.composite.uncovered.image.destination-atop
  // Description:drawImage() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.
  // Note:
  
  importScripts("/resources/testharness.js");
  importScripts("/2dcontext/resources/canvas-tests.js");
  
  var t = async_test("drawImage() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.");
  var t_pass = t.done.bind(t);
  var t_fail = t.step_func(function(reason) {
      throw reason;
  });
  t.step(function() {
  
  var offscreenCanvas = new OffscreenCanvas(100, 50);
  var ctx = offscreenCanvas.getContext('2d');
  
  
  ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
  ctx.fillRect(0, 0, 100, 50);
  ctx.globalCompositeOperation = 'destination-atop';
  var promise = new Promise(function(resolve, reject) {
      var xhr = new XMLHttpRequest();
      xhr.open("GET", '/images/yellow.png');
      xhr.responseType = 'blob';
      xhr.send();
      xhr.onload = function() {
          resolve(xhr.response);
      };
  });
  promise.then(function(response) {
      ctx.drawImage(response, 40, 40, 10, 10, 40, 50, 10, 10);
      _assertPixelApprox(offscreenCanvas, 15,15, 0,0,0,0, "15,15", "0,0,0,0", 5);
      _assertPixelApprox(offscreenCanvas, 50,25, 0,0,0,0, "50,25", "0,0,0,0", 5);
  }).then(t_pass, t_fail);
  
  });
  done();
  