tor-browser

The Tor Browser
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Worker-terminate-forever-during-evaluation.html (2559B)

      1 <!DOCTYPE html>
      2 <title>Test Worker.terminate() for a worker that tries to run forever after top-level script evaluation is started.</title>
      3 <script src="/resources/testharness.js"></script>
      4 <script src="/resources/testharnessreport.js"></script>
      5 <script>
      6 // The tests here are to provide execution coverage for the code paths for
      7 // forcible worker termination.
      8 // Expectation here is:
      9 // - Not to crash, not to cause assertion failures
     10 // - No WorkerGlobalScope error events and thus Worker error events are fired
     11 //   (#report-the-exception is not called when a script is terminated during
     12 //   #run-a-classic-script/#run-a-module-script according to the spec)
     13 // - Nothing after infinte loop, promise resolusion/rejection etc. occurs.
     14 
     15 for (const test of [
     16  {
     17    url: 'support/Worker-run-forever.js',
     18    description: 'Worker is terminated during top-level script evaluation'
     19  },
     20  {
     21    url: 'support/Worker-run-forever.js',
     22    options: {type: 'module'},
     23    description: 'Worker is terminated during top-level script evaluation (module)'
     24  },
     25  {
     26    url: 'support/Worker-run-forever-during-importScripts.js',
     27    description: 'Worker is terminated during importScripts() call'
     28  },
     29  {
     30    url: 'support/Worker-run-forever-during-nested-importScripts.js',
     31    description: 'Worker is terminated during nested importScripts() call'
     32  },
     33  {
     34    url: 'support/Worker-run-forever-during-dynamic-import.js',
     35    description: 'Worker is terminated during dynamic import()'
     36  },
     37  {
     38    url: 'support/Worker-run-forever-during-dynamic-import.js',
     39    options: {type: 'module'},
     40    description: 'Worker is terminated during dynamic import() (module)'
     41  },
     42  {
     43    url: 'support/Worker-run-forever-during-top-level-await.js',
     44    options: {type: 'module'},
     45    description: 'Worker is terminated during top-level await'
     46  }
     47 ]) {
     48  async_test((t) => {
     49    const worker = new Worker(test.url, test.options);
     50    worker.onerror = t.step_func(e => {
     51      // Calls preventDefault() to prevent this event from being considered
     52      // as an uncaught exception.
     53      e.preventDefault();
     54      assert_unreached('onerror');
     55    });
     56    worker.onmessage = t.step_func((e) => {
     57      if (e.data === 'start') {
     58        worker.terminate();
     59        // To make the worker forcibly terminated, because in Chromium worker is
     60        // forcibly terminated after 2 seconds.
     61        t.step_timeout(function() { t.done(); }, 4000);
     62      }
     63      else {
     64        assert_unreached('Unexpected message received: ' + e.data);
     65      }
     66    });
     67  }, test.description);
     68 }
     69 </script>