gecko/browser/base/content/test/browser_bug462289.js

var tab1, tab2;

function focus_in_navbar() {
  var parent = document.activeElement.parentNode;
  while (parent && parent.id != "nav-bar")
    parent = parent.parentNode;

  return (parent != null);
}

function test() {
  waitForExplicitFinish();

  tab1 = gBrowser.addTab("about:blank", {skipAnimation: true});
  tab2 = gBrowser.addTab("about:blank", {skipAnimation: true});

  EventUtils.synthesizeMouseAtCenter(tab1, {});
  setTimeout(step2, 0);
}

function step2()
{
  isnot(document.activeElement, tab1, "mouse on tab not activeElement");

  EventUtils.synthesizeMouseAtCenter(tab1, {});
  setTimeout(step3, 0);
}

function step3()
{
  isnot(document.activeElement, tab1, "mouse on tab again activeElement");

  if (gNavToolbox.getAttribute("tabsontop") == "true") {
    gURLBar.focus();
    EventUtils.synthesizeKey("VK_TAB", {shiftKey: true});
  } else {
    document.getElementById("searchbar").focus();

    while (focus_in_navbar())
      EventUtils.synthesizeKey("VK_TAB", { });
  }
  is(document.activeElement, tab1, "tab key to tab activeElement");

  EventUtils.synthesizeMouseAtCenter(tab1, {});
  setTimeout(step4, 0);
}

function step4()
{
  is(document.activeElement, tab1, "mouse on tab while focused still activeElement");

  EventUtils.synthesizeMouseAtCenter(tab2, {});
  setTimeout(step5, 0);
}

function step5()
{
  // The tabbox selects a tab within a setTimeout in a bubbling mousedown event
  // listener, and focuses the current tab if another tab previously had focus
  is(document.activeElement, tab2, "mouse on another tab while focused still activeElement");

  content.focus();
  EventUtils.synthesizeMouseAtCenter(tab2, {button: 1, type: "mousedown"});
  setTimeout(step6, 0);
}

function step6()
{
  isnot(document.activeElement, tab2, "tab not focused via middle click");

  gBrowser.removeTab(tab1);
  gBrowser.removeTab(tab2);

  finish();
}