diff -r 000000000000 -r 6474c204b198 toolkit/mozapps/extensions/test/xpinstall/browser_signed_trigger.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/mozapps/extensions/test/xpinstall/browser_signed_trigger.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,41 @@
+// ----------------------------------------------------------------------------
+// Tests installing an signed add-on through an InstallTrigger call in web
+// content.
+function test() {
+  Harness.installConfirmCallback = confirm_install;
+  Harness.installEndedCallback = install_ended;
+  Harness.installsCompletedCallback = finish_test;
+  Harness.setup();
+
+  var pm = Services.perms;
+  pm.add(makeURI("http://example.com/"), "install", pm.ALLOW_ACTION);
+
+  var triggers = encodeURIComponent(JSON.stringify({
+    "Signed XPI": TESTROOT + "signed.xpi"
+  }));
+  gBrowser.selectedTab = gBrowser.addTab();
+  gBrowser.loadURI(TESTROOT + "installtrigger.html?" + triggers);
+}
+
+function confirm_install(window) {
+  var items = window.document.getElementById("itemList").childNodes;
+  is(items.length, 1, "Should only be 1 item listed in the confirmation dialog");
+  is(items[0].name, "Signed XPI Test", "Should have seen the name from the trigger list");
+  is(items[0].url, TESTROOT + "signed.xpi", "Should have listed the correct url for the item");
+  is(items[0].cert, "(Object Signer)", "Should have seen the signer");
+  is(items[0].signed, "true", "Should have listed the item as signed");
+  return true;
+}
+
+function install_ended(install, addon) {
+  install.cancel();
+}
+
+function finish_test(count) {
+  is(count, 1, "1 Add-on should have been successfully installed");
+
+  Services.perms.remove("example.com", "install");
+
+  gBrowser.removeCurrentTab();
+  Harness.finish();
+}