The Tor Browser / file revision

 function test() {

   waitForExplicitFinish();

   gBrowser.selectedTab = gBrowser.addTab();

   // Navigate to a site with a broken cert

   window.addEventListener("DOMContentLoaded", testBrokenCert, true);

   content.location = "https://nocert.example.com/";

 }

 function testBrokenCert() {

   window.removeEventListener("DOMContentLoaded", testBrokenCert, true);

   // Confirm that we are displaying the contributed error page, not the default

   ok(gBrowser.contentDocument.documentURI.startsWith("about:certerror"), "Broken page should go to about:certerror, not about:neterror");

   // Confirm that the expert section is collapsed

   var expertDiv = gBrowser.contentDocument.getElementById("expertContent");

   ok(expertDiv, "Expert content div should exist");

   ok(expertDiv.hasAttribute("collapsed"), "Expert content should be collapsed by default");

   // Tweak the expert mode pref

   gPrefService.setBoolPref("browser.xul.error_pages.expert_bad_cert", true);

   window.addEventListener("DOMContentLoaded", testExpertPref, true);

   gBrowser.reload();

 }

 function testExpertPref() {

   window.removeEventListener("DOMContentLoaded", testExpertPref, true);

   var expertDiv = gBrowser.contentDocument.getElementById("expertContent");

   var technicalDiv = gBrowser.contentDocument.getElementById("technicalContent");

   ok(!expertDiv.hasAttribute("collapsed"), "Expert content should not be collapsed with the expert mode pref set");

   ok(!technicalDiv.hasAttribute("collapsed"), "Technical content should not be collapsed with the expert mode pref set");

   // Clean up

   gBrowser.removeCurrentTab();

   if (gPrefService.prefHasUserValue("browser.xul.error_pages.expert_bad_cert"))

     gPrefService.clearUserPref("browser.xul.error_pages.expert_bad_cert");

   finish();

 }