Allow selecting test mode with command-line argument

Useful for local development.

qubes_menu/appmenu.py

@@ -114,6 +114,15 @@ def __init__(self, qapp, dispatcher):
         self.tasks = []
 
     def _add_cli_options(self):
+        self.add_main_option(
+            "mock-qubes",
+            ord("m"),
+            GLib.OptionFlags.NONE,
+            GLib.OptionArg.NONE,
+            "Use fake Qubes object (FOR TESTING AND DEBUGGING ONLY)",
+            None,
+        )
+
         self.add_main_option(
             "keep-visible",
             ord("k"),
@@ -166,6 +175,17 @@ def parse_options(self, options: Dict[str, Any]):
                                  if int(v) == int(options["page"])][0]
         if "background" in options:
             self.start_in_background = True
+        if "mock-qubes" in options:
+            from qubesadmin.tests.mock_app import MockQubesComplete, MockDispatcher, MockQube
+            self.qapp = MockQubesComplete()
+
+            self.qapp._qubes['test-vm2'] = MockQube(name="test-vm2", qapp=self.qapp,
+                                               features={'menu-favorites': ''})
+            self.qapp._qubes['dom0'].features['menu-initial-page'] = 'favorites_page'
+            self.qapp._qubes['dom0'].features['menu-sort-running'] = '1'
+            self.qapp.update_vm_calls()
+
+            self.dispatcher = MockDispatcher(self.qapp)
 
     @staticmethod
     def _do_power_button(_widget):