tests: Add standalone PolkitD implementation

We need to be able to hack this to be an async daemon to perform some
multi-thread tests, so replacing default implementation with a simple
one that for now just does same of default

tests/dbusmock/polkitd.py

@@ -0,0 +1,74 @@
+# -*- coding: utf-8 -*-
+
+'''polkit mock template
+
+This creates the basic methods and properties of the
+org.freedesktop.PolicyKit1.Authority object, so that we can use it async
+'''
+
+# This program is free software; you can redistribute it and/or modify it under
+# the terms of the GNU Lesser General Public License as published by the Free
+# Software Foundation; either version 3 of the License, or (at your option) any
+# later version.  See http://www.gnu.org/copyleft/lgpl.html for the full text
+# of the license.
+
+__author__ = 'Marco Trevisan'
+__email__ = 'marco.trevisan@canonical.com'
+__copyright__ = '(c) 2020 Canonical Ltd.'
+__license__ = 'LGPL 3+'
+
+import dbus
+
+from dbusmock import MOCK_IFACE, mockobject
+
+BUS_NAME = 'org.freedesktop.PolicyKit1'
+MAIN_OBJ = '/org/freedesktop/PolicyKit1/Authority'
+MAIN_IFACE = 'org.freedesktop.PolicyKit1.Authority'
+SYSTEM_BUS = True
+IS_OBJECT_MANAGER = False
+
+def load(mock, parameters):
+    polkitd = mockobject.objects[MAIN_OBJ]
+    # default state
+    polkitd.allow_unknown = False
+    polkitd.allowed = []
+
+    mock.AddProperties(MAIN_IFACE,
+                       dbus.Dictionary({
+                           'BackendName': 'local',
+                           'BackendVersion': '0.8.15',
+                           'BackendFeatures': dbus.UInt32(1, variant_level=1),
+                       }, signature='sv'))
+
+
+@dbus.service.method(MAIN_IFACE,
+                     in_signature='(sa{sv})sa{ss}us', out_signature='(bba{ss})')
+def CheckAuthorization(self, subject, action_id, details, flags, cancellation_id):
+    return (action_id in self.allowed or self.allow_unknown, False, {'test': 'test'})
+
+
+@dbus.service.method(MOCK_IFACE, in_signature='b', out_signature='')
+def AllowUnknown(self, default):
+    '''Control whether unknown actions are allowed
+
+    This controls the return value of CheckAuthorization for actions which were
+    not explicitly allowed by SetAllowed().
+    '''
+    self.allow_unknown = default
+
+
+@dbus.service.method(MOCK_IFACE, in_signature='as', out_signature='')
+def SetAllowed(self, actions):
+    '''Set allowed actions'''
+
+    self.allowed = actions
+
+@dbus.service.method(MAIN_IFACE,
+                     in_signature='', out_signature='o')
+def GetDefaultDevice(self):
+    devices = self.GetDevices()
+    if len(devices) < 1:
+        raise dbus.exceptions.DBusException(
+            'No devices available',
+            name='net.reactivated.Fprint.Error.NoSuchDevice')
+    return devices[0]

tests/fprintd.py

@@ -136,6 +136,7 @@ class FPrintdTest(dbusmock.DBusTestCase):
     def setUpClass(cls):
         super().setUpClass()
         fprintd = None
+        cls._polkitd = None
 
         if 'FPRINT_BUILD_DIR' in os.environ:
             print('Testing local build')
@@ -256,9 +257,19 @@ class FPrintdTest(dbusmock.DBusTestCase):
         self.daemon = None
 
     def polkitd_start(self):
+        if self._polkitd:
+            return
+
+        if 'POLKITD_MOCK_PATH' in os.environ:
+            polkitd_template = os.path.join(os.getenv('POLKITD_MOCK_PATH'), 'polkitd.py')
+        else:
+            polkitd_template = os.path.join(os.path.dirname(__file__), 'dbusmock/polkitd.py')
+        print ('Using template from %s' % polkitd_template)
+
         self._polkitd, self._polkitd_obj = self.spawn_server_template(
-            'polkitd', {}, stdout=DEVNULL)
-        self.addCleanup(self.polkitd_stop)
+            polkitd_template, {}, stdout=subprocess.PIPE)
+
+        return self._polkitd
 
     def polkitd_stop(self):
         if self._polkitd is None:
@@ -365,6 +376,7 @@ class FPrintdVirtualDeviceBaseTest(FPrintdTest):
         self.g_signal_id = self.device.connect('g-signal', signal_cb)
 
     def tearDown(self):
+        self.polkitd_stop()
         self.device.disconnect(self.g_signal_id)
         self.device = None
         self.manager = None