1 files changed, 32 insertions, 0 deletions
diff --git a/js/xpconnect/tests/unit/head.js b/js/xpconnect/tests/unit/head.js
new file mode 100644
index 0000000000..be3d74401a
--- /dev/null
+++ b/js/xpconnect/tests/unit/head.js
@@ -0,0 +1,32 @@
+"use strict";
+
+// Wraps the given object in an XPConnect wrapper and, if an interface
+// is passed, queries the result to that interface.
+function xpcWrap(obj, iface) {
+  let ifacePointer = Cc[
+    "@mozilla.org/supports-interface-pointer;1"
+  ].createInstance(Ci.nsISupportsInterfacePointer);
+
+  ifacePointer.data = obj;
+  if (iface) {
+    return ifacePointer.data.QueryInterface(iface);
+  }
+  return ifacePointer.data;
+}
+
+function createContentWindow(uri) {
+  const principal = Services.scriptSecurityManager
+    .createContentPrincipalFromOrigin(uri);
+  const webnav = Services.appShell.createWindowlessBrowser(false);
+  const docShell = webnav.docShell;
+  docShell.createAboutBlankDocumentViewer(principal, principal);
+  return webnav.document.defaultView;
+}
+
+function createChromeWindow() {
+  const principal = Services.scriptSecurityManager.getSystemPrincipal();
+  const webnav = Services.appShell.createWindowlessBrowser(true);
+  const docShell = webnav.docShell;
+  docShell.createAboutBlankDocumentViewer(principal, principal);
+  return webnav.document.defaultView;
+}