Quelle test_doc_busy.html Sprache: HTML

products/Sources/formale Sprachen/C/Firefox/accessible/tests/mochitest/states/test_doc_busy.html

<!DOCTYPE html>
<html>
<head>
  <title>states of document</title>
  <link rel="stylesheet" type="text/css"
        href="chrome://mochikit/content/tests/SimpleTest/test.css" />

  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>

  <script type="application/javascript"
          src="../common.js"></script>
  <script type="application/javascript"
          src="../role.js"></script>
  <script type="application/javascript"
          src="../states.js"></script>
  <script type="application/javascript"
          src="../promisified-events.js"></script>

  <script type="application/javascript">
    const { BrowserTestUtils } = ChromeUtils.importESModule(
      "resource://testing-common/BrowserTestUtils.sys.mjs");
    const { Downloads } = ChromeUtils.importESModule(
      "resource://gre/modules/Downloads.sys.mjs");

    function matchDocBusyChange(isBusy) {
      return function(event) {
        const scEvent = event.QueryInterface(nsIAccessibleStateChangeEvent);
        return (
          event.DOMNode == document &&
          scEvent.state === STATE_BUSY &&
          scEvent.isEnabled === isBusy
        );
      };
    }

    function getDownloadStartedPromise() {
      return Downloads.getList(Downloads.PUBLIC).then(list => {
        return new Promise(resolve => {
          list.addView({
            onDownloadAdded(download) {
              resolve(download);
            }
          })
        });
      });
    }

    async function downloadHandled(downloadResult) {
      if (Window.isInstance(downloadResult)) {
        return BrowserTestUtils.closeWindow(downloadResult);
      }
      // downloadResult is a download object.
      await downloadResult.finalize(true);
      return Downloads.getList(Downloads.PUBLIC).then(list => list.remove(downloadResult));
    }

    async function doTest() {
      // Because of variable timing, there are two acceptable possibilities:
      // 1. We get an event for busy and an event for not busy.
      // 2. The two events get coalesced, so no events are fired.
      // However, we fail this test if we get the first event but not the
      // second.
      let gotBusy = false;
      let gotNotBusy = false;
      const busyEvents = async function() {
        await waitForEvent(EVENT_STATE_CHANGE, matchDocBusyChange(true));
        info("Got busy event");
        gotBusy = true;
        await waitForEvent(EVENT_STATE_CHANGE, matchDocBusyChange(false));
        info("Got not-busy event");
        gotNotBusy = true;
      }();

      const downloadStarted = getDownloadStartedPromise();

      info("Clicking link to trigger download");
      synthesizeMouse(getNode("link"), 1, 1, {});
      info("Waiting for download prompt to open");
      const downloadResult = await downloadStarted;

      // Once we no longer show a dialog for downloads, the not busy event
      // might show up a bit later.
      if (gotBusy && !gotNotBusy) {
        await busyEvents;
      }

      // Any busy events should have been fired by the time the download
      // prompt has opened.
      if (gotBusy && gotNotBusy) {
        ok(true, "Got both busy change and not-busy change");
      } else if (!gotBusy && !gotNotBusy) {
        ok(true, "No busy events, coalesced");
      } else {
        ok(false, "Got busy change but didn't get not-busy change!");
      }
      testStates(document, 0, 0, STATE_BUSY, 0, "Document not busy");

      // Clean up.
      info("Closing download prompt");
      await downloadHandled(downloadResult);
      // We might still be waiting on busy events. Remove any pending observers.
      for (let observer of Services.obs.enumerateObservers(
        "accessible-event")
      ) {
        Services.obs.removeObserver(observer, "accessible-event");
      }

      SimpleTest.finish();
    }

    SimpleTest.waitForExplicitFinish();
    addA11yLoadEvent(doTest);
  </script>
</head>

<body>

  <a target="_blank"
     title="Missing busy state change event when downloading files"
     href="https://bugzilla.mozilla.org/show_bug.cgi?id=446469">Bug 446469</a>

  <p id="display"></p>
  <div id="content" style="display: none"></div>
  <pre id="test">
  </pre>

  <a id="link" href="http://example.com/a11y/accessible/tests/mochitest/dumbfile.zip">a file</a>
</body>
</html>

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