text: // DO NOT EDIT! This test has been generated by /offscreen-canvas/tools/gentest.py.
  // OffscreenCanvas test in a worker:2d.composite.canvas.source-over
  // Description:
  // Note:
  
  importScripts("/resources/testharness.js");
  importScripts("/2dcontext/resources/canvas-tests.js");
  
  var t = async_test("");
  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');
  
  
  var offscreenCanvas2 = new OffscreenCanvas(offscreenCanvas.width, offscreenCanvas.height);
  var ctx2 = offscreenCanvas2.getContext('2d');
  var promise = new Promise(function(resolve, reject) {
      var xhr = new XMLHttpRequest();
      xhr.open("GET", '/images/yellow75.png');
      xhr.responseType = 'blob';
      xhr.send();
      xhr.onload = function() {
          resolve(xhr.response);
      };
  });
  promise.then(function(response) {
      createImageBitmap(response).then(bitmap => {
          ctx2.drawImage(bitmap, 0, 0);
          ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
          ctx.fillRect(0, 0, 100, 50);
          ctx.globalCompositeOperation = 'source-over';
          ctx.drawImage(offscreenCanvas2, 0, 0);
          _assertPixelApprox(offscreenCanvas, 50,25, 219,255,36,223, "50,25", "219,255,36,223", 5);
      }, t_fail);
  }).then(t_pass, t_fail);
  
  });
  done();
  