third_party/WebKit/LayoutTests/crypto/worker-random-values-concurrent.html

   1 <!DOCTYPE html>
   2 <html>
   3 <head>
   4 <script src="../resources/js-test.js"></script>
   5 </head>
   6 <body>
   7 <p id="description"></p>
   8 <div id="console"></div>
   9
  10 <script>
  11     description("Tests concurrent calls to crypto.randomValues from workers.");
  12
  13     // Generate random values from different 10 workers, and wait until they
  14     // have all finished.
  15     var randomValues = {};
  16     var numRandomValues = 0;
  17     var NUM_WORKERS = 10;
  18
  19     self.jsTestIsAsync = true;
  20
  21     // Asserts that each call to receivedRandomValue() contains unique bytes.
  22     // The bytes are 100 randomly generated, and as such have an extremely low
  23     // probability of matching each other.
  24     function workerGeneratedRandomBytes(bytes)
  25     {
  26         if (bytes.length != 100)
  27             throw "bytes is not the right length: " + bytes.length;
  28
  29         var bytesStr = Array.prototype.join.call(bytes, '');
  30
  31         if (bytesStr in randomValues)
  32             debug("Generated a duplicate 'random' number: " + bytesStr);
  33         else
  34             debug("Received random bytes from worker");
  35
  36         randomValues[bytesStr] = true;
  37
  38         if (++numRandomValues == NUM_WORKERS)
  39             finishJSTest();
  40     }
  41
  42     for (var i = 0; i < NUM_WORKERS; ++i) {
  43         var worker = new Worker('random-values-concurrent.js');
  44         worker.onmessage = function(event)
  45         {
  46             if (event.data instanceof Uint8Array)
  47                 workerGeneratedRandomBytes(event.data);
  48             else
  49                 debug('[Worker] ' + event.data);
  50         }
  51         worker.onerror = function(event)
  52         {
  53             debug('Got error from worker: ' + event.message);
  54             finishJSTest();
  55         }
  56     }
  57 </script>
  58
  59 </body>
  60 </html>