// by jussi-kalliokoski


// This test is asynchronous. Watch out.

// The test will potentially add garbage to console.

(function(){
  try {

    // we're avoiding using Modernizr._domPrefixes as the prefix capitalization on
    // these guys are notoriously peculiar.
    var BlobBuilder = window.MozBlobBuilder || window.WebKitBlobBuilder || window.MSBlobBuilder || window.OBlobBuilder || window.BlobBuilder,
        URL         = window.MozURL || window.webkitURL || window.MSURL || window.OURL || window.URL;

    var data    = 'Modernizr',
        bb      = new BlobBuilder();

    bb.append('this.onmessage=function(e){postMessage(e.data)}');

    var url     = URL.createObjectURL(bb.getBlob()),
        worker  = new Worker(url);

    bb = null;

    worker.onmessage = function(e) {
      worker.terminate();
      URL.revokeObjectURL(url);
      Modernizr.addTest('blobworkers', data === e.data);
      worker = null;
    };

    // Just in case...
    worker.onerror = function() {
      Modernizr.addTest('blobworkers', false);
      worker = null;
    };

    setTimeout(function() {
        Modernizr.addTest('blobworkers', false);
    }, 200);

    worker.postMessage(data);

  } catch (e) {
    Modernizr.addTest('blobworkers', false);
  }
}());