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  • Committer: Teddy Hogeborn
  • Date: 2019-08-02 22:16:53 UTC
  • Revision ID: teddy@recompile.se-20190802221653-ic1iko9hbefzwsk7
Fix bug in server Debian package: Fails to start on first install

There has been a very long-standing bug where installation of the
server (the "mandos" Debian package) would fail to start the server
properly right after installation.  It would work on manual (re)start
after installation, or after reboot, and even after package purge and
reinstall, it would then work the first time.  The problem, it turns
out, is when the new "_mandos" user (and corresponding group) is
created, the D-Bus server is not reloaded, and is therefore not aware
of that user, and does not recognize the user and group name in the
/etc/dbus-1/system.d/mandos.conf file.  The Mandos server, when it
tries to start and access the D-Bus, is then not permitted to connect
to its D-Bus bus name, and disables D-Bus use as a fallback measure;
i.e. the server works, but it is not controllable via D-Bus commands
(via mandos-ctl or mandos-monitor).  The next time the D-Bus daemon is
reloaded for any reason, the new user & group would become visible to
the D-Bus daemon and after that, any restart of the Mandos server
would succeed and it would bind to its D-Bus name properly, and
thereby be visible and controllable by mandos-ctl & mandos-monitor.
This was mostly invisible when using sysvinit, but systemd makes the
problem visible since the systemd service file for the Mandos server
is configured to not consider the Mandos server "started" until the
D-Bus name has been bound; this makes the starting of the service wait
for 90 seconds and then fail with a timeout error.

Fixing this should also make the Debian CI autopkgtest tests work.

* debian/mandos.postinst (configure): After creating (or renaming)
                                      user & group, reload D-Bus
                                      daemon (if present).

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mandos-ctl
1
 
#!/usr/bin/python3 -bbI
 
1
#!/usr/bin/python
2
2
# -*- after-save-hook: (lambda () (let ((command (if (fboundp 'file-local-name) (file-local-name (buffer-file-name)) (or (file-remote-p (buffer-file-name) 'localname) (buffer-file-name))))) (if (= (progn (if (get-buffer "*Test*") (kill-buffer "*Test*")) (process-file-shell-command (format "%s --check" (shell-quote-argument command)) nil "*Test*")) 0) (let ((w (get-buffer-window "*Test*"))) (if w (delete-window w))) (progn (with-current-buffer "*Test*" (compilation-mode)) (display-buffer "*Test*" '(display-buffer-in-side-window)))))); coding: utf-8 -*-
3
3
#
4
 
# Mandos Control - Control or query the Mandos server
 
4
# Mandos Monitor - Control and monitor the Mandos server
5
5
#
6
6
# Copyright © 2008-2019 Teddy Hogeborn
7
7
# Copyright © 2008-2019 Björn Påhlsson
46
46
import tempfile
47
47
import contextlib
48
48
 
49
 
if sys.version_info.major == 2:
50
 
    __metaclass__ = type
51
 
    str = unicode
52
 
 
53
 
class gi:
54
 
    """Dummy gi module, for the tests"""
55
 
    class repository:
56
 
        class GLib:
57
 
            class Error(Exception):
58
 
                pass
59
 
dbussy = None
60
 
ravel = None
61
 
dbus_python = None
62
 
pydbus = None
63
 
 
64
49
try:
65
 
    import dbussy
66
 
    import ravel
 
50
    import pydbus
 
51
    import gi
 
52
    dbus_python = None
67
53
except ImportError:
68
 
    try:
69
 
        import pydbus
70
 
        import gi
71
 
    except ImportError:
72
 
        import dbus as dbus_python
73
 
 
 
54
    import dbus as dbus_python
 
55
    pydbus = None
 
56
    class gi(object):
 
57
        """Dummy gi module, for the tests"""
 
58
        class repository(object):
 
59
            class GLib(object):
 
60
                class Error(Exception):
 
61
                    pass
74
62
 
75
63
# Show warnings by default
76
64
if not sys.warnoptions:
84
72
logging.captureWarnings(True)   # Show warnings via the logging system
85
73
 
86
74
if sys.version_info.major == 2:
 
75
    str = unicode
87
76
    import StringIO
88
77
    io.StringIO = StringIO.StringIO
89
78
 
90
79
locale.setlocale(locale.LC_ALL, "")
91
80
 
92
 
version = "1.8.11"
 
81
version = "1.8.5"
93
82
 
94
83
 
95
84
def main():
104
93
    if options.debug:
105
94
        log.setLevel(logging.DEBUG)
106
95
 
107
 
    if dbussy is not None and ravel is not None:
108
 
        bus = dbussy_adapter.CachingBus(dbussy, ravel)
109
 
    elif pydbus is not None:
 
96
    if pydbus is not None:
110
97
        bus = pydbus_adapter.CachingBus(pydbus)
111
98
    else:
112
99
        bus = dbus_python_adapter.CachingBus(dbus_python)
480
467
        parser.error("--remove can only be combined with --deny")
481
468
 
482
469
 
483
 
class dbus:
 
470
class dbus(object):
484
471
 
485
 
    class SystemBus:
 
472
    class SystemBus(object):
486
473
 
487
474
        object_manager_iface = "org.freedesktop.DBus.ObjectManager"
488
475
        def get_managed_objects(self, busname, objectpath):
497
484
                             self.properties_iface, interface, key,
498
485
                             value)
499
486
 
500
 
        def call_method(self, methodname, busname, objectpath,
501
 
                        interface, *args):
502
 
            raise NotImplementedError()
503
 
 
504
487
 
505
488
    class MandosBus(SystemBus):
506
489
        busname_domain = "se.recompile"
538
521
        pass
539
522
 
540
523
 
541
 
class dbus_python_adapter:
 
524
class dbus_python_adapter(object):
542
525
 
543
526
    class SystemBus(dbus.MandosBus):
544
527
        """Use dbus-python"""
598
581
                                     self.client_interface, key,
599
582
                                     value)
600
583
 
601
 
    class SilenceLogger:
 
584
    class SilenceLogger(object):
602
585
        "Simple context manager to silence a particular logger"
603
586
        def __init__(self, loggername):
604
587
            self.logger = logging.getLogger(loggername)
633
616
                return new_object
634
617
 
635
618
 
636
 
class pydbus_adapter:
 
619
class pydbus_adapter(object):
637
620
    class SystemBus(dbus.MandosBus):
638
621
        def __init__(self, module=pydbus):
639
622
            self.pydbus = module
696
679
                return new_object
697
680
 
698
681
 
699
 
class dbussy_adapter:
700
 
    class SystemBus(dbus.SystemBus):
701
 
        """Use DBussy"""
702
 
 
703
 
        def __init__(self, dbussy, ravel):
704
 
            self.dbussy = dbussy
705
 
            self.ravel = ravel
706
 
            self.bus = ravel.system_bus()
707
 
 
708
 
        @contextlib.contextmanager
709
 
        def convert_exception(self, exception_class=dbus.Error):
710
 
            try:
711
 
                yield
712
 
            except self.dbussy.DBusError as e:
713
 
                # This does what "raise from" would do
714
 
                exc = exception_class(*e.args)
715
 
                exc.__cause__ = e
716
 
                raise exc
717
 
 
718
 
        def call_method(self, methodname, busname, objectpath,
719
 
                        interface, *args):
720
 
            proxy_object = self.get_object(busname, objectpath)
721
 
            log.debug("D-Bus: %s:%s:%s.%s(%s)", busname, objectpath,
722
 
                      interface, methodname,
723
 
                      ", ".join(repr(a) for a in args))
724
 
            iface = proxy_object.get_interface(interface)
725
 
            method = getattr(iface, methodname)
726
 
            with self.convert_exception(dbus.Error):
727
 
                value =  method(*args)
728
 
            # DBussy returns values either as an empty list or as a
729
 
            # list of one element with the return value
730
 
            if value:
731
 
                return self.type_filter(value[0])
732
 
 
733
 
        def get_object(self, busname, objectpath):
734
 
            log.debug("D-Bus: Connect to: (busname=%r, path=%r)",
735
 
                      busname, objectpath)
736
 
            with self.convert_exception(dbus.ConnectFailed):
737
 
                return self.bus[busname][objectpath]
738
 
 
739
 
        def type_filter(self, value):
740
 
            """Convert the most bothersome types to Python types"""
741
 
            # A D-Bus Variant value is represented as the Python type
742
 
            # Tuple[dbussy.DBUS.Signature, Any]
743
 
            if isinstance(value, tuple):
744
 
                if (len(value) == 2
745
 
                    and isinstance(value[0],
746
 
                                   self.dbussy.DBUS.Signature)):
747
 
                    return self.type_filter(value[1])
748
 
            elif isinstance(value, self.dbussy.DBUS.ObjectPath):
749
 
                return str(value)
750
 
            # Also recurse into dictionaries
751
 
            elif isinstance(value, dict):
752
 
                return {self.type_filter(key):
753
 
                        self.type_filter(subval)
754
 
                        for key, subval in value.items()}
755
 
            return value
756
 
 
757
 
        def set_property(self, busname, objectpath, interface, key,
758
 
                         value):
759
 
            proxy_object = self.get_object(busname, objectpath)
760
 
            log.debug("D-Bus: %s:%s:%s.Set(%r, %r, %r)", busname,
761
 
                      objectpath, self.properties_iface, interface,
762
 
                      key, value)
763
 
            if key == "Secret":
764
 
                # DBussy wants a Byte Array to be a sequence of
765
 
                # values, not a byte string
766
 
                value = tuple(value)
767
 
            setattr(proxy_object.get_interface(interface), key, value)
768
 
 
769
 
    class MandosBus(SystemBus, dbus.MandosBus):
770
 
        pass
771
 
 
772
 
    class CachingBus(MandosBus):
773
 
        """A caching layer for dbussy_adapter.MandosBus"""
774
 
        def __init__(self, *args, **kwargs):
775
 
            self.object_cache = {}
776
 
            super(dbussy_adapter.CachingBus, self).__init__(*args,
777
 
                                                            **kwargs)
778
 
        def get_object(self, busname, objectpath):
779
 
            try:
780
 
                return self.object_cache[(busname, objectpath)]
781
 
            except KeyError:
782
 
                new_object = super(
783
 
                    dbussy_adapter.CachingBus,
784
 
                    self).get_object(busname, objectpath)
785
 
                self.object_cache[(busname, objectpath)]  = new_object
786
 
                return new_object
787
 
 
788
 
 
789
682
def commands_from_options(options):
790
683
 
791
684
    commands = list(options.commands)
819
712
    return commands
820
713
 
821
714
 
822
 
class command:
 
715
class command(object):
823
716
    """A namespace for command classes"""
824
717
 
825
 
    class Base:
 
718
    class Base(object):
826
719
        """Abstract base class for commands"""
827
720
        def run(self, clients, bus=None):
828
721
            """Normal commands should implement run_on_one_client(),
891
784
                keywords = self.all_keywords
892
785
            print(self.TableOfClients(clients.values(), keywords))
893
786
 
894
 
        class TableOfClients:
 
787
        class TableOfClients(object):
895
788
            tableheaders = {
896
789
                "Name": "Name",
897
790
                "Enabled": "Enabled",
1128
1021
                                                     "output"))
1129
1022
 
1130
1023
 
1131
 
class Unique:
 
1024
class Unique(object):
1132
1025
    """Class for objects which exist only to be unique objects, since
1133
1026
unittest.mock.sentinel only exists in Python 3.3"""
1134
1027
 
1418
1311
class Test_dbus_python_adapter_SystemBus(TestCaseWithAssertLogs):
1419
1312
 
1420
1313
    def MockDBusPython_func(self, func):
1421
 
        class mock_dbus_python:
 
1314
        class mock_dbus_python(object):
1422
1315
            """mock dbus-python module"""
1423
 
            class exceptions:
 
1316
            class exceptions(object):
1424
1317
                """Pseudo-namespace"""
1425
1318
                class DBusException(Exception):
1426
1319
                    pass
1427
 
            class SystemBus:
 
1320
            class SystemBus(object):
1428
1321
                @staticmethod
1429
1322
                def get_object(busname, objectpath):
1430
1323
                    DBusObject = collections.namedtuple(
1444
1337
                                    dbus_interface=dbus_interface)
1445
1338
                    return DBusObject(methodname=method,
1446
1339
                                      Set=set_property)
1447
 
            class Boolean:
 
1340
            class Boolean(object):
1448
1341
                def __init__(self, value):
1449
1342
                    self.value = bool(value)
1450
1343
                def __bool__(self):
1634
1527
        finally:
1635
1528
            dbus_logger.removeFilter(counting_handler)
1636
1529
 
1637
 
        self.assertNotIsInstance(e.exception, dbus.ConnectFailed)
 
1530
        self.assertNotIsInstance(e, dbus.ConnectFailed)
1638
1531
 
1639
1532
        # Make sure the dbus logger was suppressed
1640
1533
        self.assertEqual(0, counting_handler.count)
1662
1555
            self.call_method(bus, "methodname", "busname",
1663
1556
                             "objectpath", "interface")
1664
1557
 
1665
 
    class fake_dbus_python_raises_exception_on_connect:
 
1558
    class fake_dbus_python_raises_exception_on_connect(object):
1666
1559
        """fake dbus-python module"""
1667
 
        class exceptions:
 
1560
        class exceptions(object):
1668
1561
            """Pseudo-namespace"""
1669
1562
            class DBusException(Exception):
1670
1563
                pass
1678
1571
 
1679
1572
 
1680
1573
class Test_dbus_python_adapter_CachingBus(unittest.TestCase):
1681
 
    class mock_dbus_python:
 
1574
    class mock_dbus_python(object):
1682
1575
        """mock dbus-python modules"""
1683
 
        class SystemBus:
 
1576
        class SystemBus(object):
1684
1577
            @staticmethod
1685
1578
            def get_object(busname, objectpath):
1686
1579
                return Unique()
1732
1625
class Test_pydbus_adapter_SystemBus(TestCaseWithAssertLogs):
1733
1626
 
1734
1627
    def Stub_pydbus_func(self, func):
1735
 
        class stub_pydbus:
 
1628
        class stub_pydbus(object):
1736
1629
            """stub pydbus module"""
1737
 
            class SystemBus:
 
1630
            class SystemBus(object):
1738
1631
                @staticmethod
1739
1632
                def get(busname, objectpath):
1740
1633
                    DBusObject = collections.namedtuple(
1777
1670
            self.call_method(bus, "methodname", "busname",
1778
1671
                             "objectpath", "interface")
1779
1672
 
1780
 
        self.assertNotIsInstance(e.exception, dbus.ConnectFailed)
 
1673
        self.assertNotIsInstance(e, dbus.ConnectFailed)
1781
1674
 
1782
1675
    def test_get_converts_to_correct_exception(self):
1783
1676
        bus = pydbus_adapter.SystemBus(
1786
1679
            self.call_method(bus, "methodname", "busname",
1787
1680
                             "objectpath", "interface")
1788
1681
 
1789
 
    class fake_pydbus_raises_exception_on_connect:
 
1682
    class fake_pydbus_raises_exception_on_connect(object):
1790
1683
        """fake dbus-python module"""
1791
1684
        @classmethod
1792
1685
        def SystemBus(cls):
1796
1689
            return Bus(get=get)
1797
1690
 
1798
1691
    def test_set_property_uses_setattr(self):
1799
 
        class Object:
 
1692
        class Object(object):
1800
1693
            pass
1801
1694
        obj = Object()
1802
 
        class pydbus_spy:
1803
 
            class SystemBus:
 
1695
        class pydbus_spy(object):
 
1696
            class SystemBus(object):
1804
1697
                @staticmethod
1805
1698
                def get(busname, objectpath):
1806
1699
                    return {"interface": obj}
1813
1706
    def test_get_suppresses_xml_deprecation_warning(self):
1814
1707
        if sys.version_info.major >= 3:
1815
1708
            return
1816
 
        class stub_pydbus_get:
1817
 
            class SystemBus:
 
1709
        class stub_pydbus_get(object):
 
1710
            class SystemBus(object):
1818
1711
                @staticmethod
1819
1712
                def get(busname, objectpath):
1820
1713
                    warnings.warn_explicit(
1828
1721
 
1829
1722
 
1830
1723
class Test_pydbus_adapter_CachingBus(unittest.TestCase):
1831
 
    class stub_pydbus:
 
1724
    class stub_pydbus(object):
1832
1725
        """stub pydbus module"""
1833
 
        class SystemBus:
 
1726
        class SystemBus(object):
1834
1727
            @staticmethod
1835
1728
            def get(busname, objectpath):
1836
1729
                return Unique()
1878
1771
        self.assertIs(obj1, obj1b)
1879
1772
 
1880
1773
 
1881
 
class Test_dbussy_adapter_SystemBus(TestCaseWithAssertLogs):
1882
 
 
1883
 
    class dummy_dbussy:
1884
 
        class DBUS:
1885
 
            class ObjectPath(str):
1886
 
                pass
1887
 
        class DBusError(Exception):
1888
 
            pass
1889
 
 
1890
 
    def fake_ravel_func(self, func):
1891
 
        class fake_ravel:
1892
 
            @staticmethod
1893
 
            def system_bus():
1894
 
                class DBusInterfaceProxy:
1895
 
                    @staticmethod
1896
 
                    def methodname(*args):
1897
 
                        return [func(*args)]
1898
 
                class DBusObject:
1899
 
                    @staticmethod
1900
 
                    def get_interface(interface):
1901
 
                        if interface == "interface":
1902
 
                            return DBusInterfaceProxy()
1903
 
                return {"busname": {"objectpath": DBusObject()}}
1904
 
        return fake_ravel
1905
 
 
1906
 
    def call_method(self, bus, methodname, busname, objectpath,
1907
 
                    interface, *args):
1908
 
        with self.assertLogs(log, logging.DEBUG):
1909
 
            return bus.call_method(methodname, busname, objectpath,
1910
 
                                   interface, *args)
1911
 
 
1912
 
    def test_call_method_returns(self):
1913
 
        expected_method_return = Unique()
1914
 
        method_args = (Unique(), Unique())
1915
 
        def func(*args):
1916
 
            self.assertEqual(len(method_args), len(args))
1917
 
            for marg, arg in zip(method_args, args):
1918
 
                self.assertIs(marg, arg)
1919
 
            return expected_method_return
1920
 
        fake_ravel = self.fake_ravel_func(func)
1921
 
        bus = dbussy_adapter.SystemBus(self.dummy_dbussy, fake_ravel)
1922
 
        ret = self.call_method(bus, "methodname", "busname",
1923
 
                               "objectpath", "interface",
1924
 
                               *method_args)
1925
 
        self.assertIs(ret, expected_method_return)
1926
 
 
1927
 
    def test_call_method_filters_objectpath(self):
1928
 
        def func():
1929
 
            return method_return
1930
 
        fake_ravel = self.fake_ravel_func(func)
1931
 
        bus = dbussy_adapter.SystemBus(self.dummy_dbussy, fake_ravel)
1932
 
        method_return = (self.dummy_dbussy.DBUS
1933
 
                         .ObjectPath("objectpath"))
1934
 
        ret = self.call_method(bus, "methodname", "busname",
1935
 
                               "objectpath", "interface")
1936
 
        self.assertEqual("objectpath", ret)
1937
 
        self.assertNotIsInstance(ret,
1938
 
                                 self.dummy_dbussy.DBUS.ObjectPath)
1939
 
 
1940
 
    def test_call_method_filters_objectpaths_in_dict(self):
1941
 
        ObjectPath = self.dummy_dbussy.DBUS.ObjectPath
1942
 
        def func():
1943
 
            return method_return
1944
 
        fake_ravel = self.fake_ravel_func(func)
1945
 
        bus = dbussy_adapter.SystemBus(self.dummy_dbussy, fake_ravel)
1946
 
        method_return = {
1947
 
            ObjectPath("objectpath_key_1"):
1948
 
            ObjectPath("objectpath_value_1"),
1949
 
            ObjectPath("objectpath_key_2"):
1950
 
            ObjectPath("objectpath_value_2"),
1951
 
        }
1952
 
        ret = self.call_method(bus, "methodname", "busname",
1953
 
                               "objectpath", "interface")
1954
 
        expected_method_return = {str(key): str(value)
1955
 
                                  for key, value in
1956
 
                                  method_return.items()}
1957
 
        for key, value in ret.items():
1958
 
            self.assertNotIsInstance(key, ObjectPath)
1959
 
            self.assertNotIsInstance(value, ObjectPath)
1960
 
        self.assertEqual(expected_method_return, ret)
1961
 
        self.assertIsInstance(ret, dict)
1962
 
 
1963
 
    def test_call_method_filters_objectpaths_in_dict_in_dict(self):
1964
 
        ObjectPath = self.dummy_dbussy.DBUS.ObjectPath
1965
 
        def func():
1966
 
            return method_return
1967
 
        fake_ravel = self.fake_ravel_func(func)
1968
 
        bus = dbussy_adapter.SystemBus(self.dummy_dbussy, fake_ravel)
1969
 
        method_return = {
1970
 
            ObjectPath("key1"): {
1971
 
                ObjectPath("key11"): ObjectPath("value11"),
1972
 
                ObjectPath("key12"): ObjectPath("value12"),
1973
 
            },
1974
 
            ObjectPath("key2"): {
1975
 
                ObjectPath("key21"): ObjectPath("value21"),
1976
 
                ObjectPath("key22"): ObjectPath("value22"),
1977
 
            },
1978
 
        }
1979
 
        ret = self.call_method(bus, "methodname", "busname",
1980
 
                               "objectpath", "interface")
1981
 
        expected_method_return = {
1982
 
            "key1": {"key11": "value11",
1983
 
                     "key12": "value12"},
1984
 
            "key2": {"key21": "value21",
1985
 
                     "key22": "value22"},
1986
 
        }
1987
 
        self.assertEqual(expected_method_return, ret)
1988
 
        for key, value in ret.items():
1989
 
            self.assertIsInstance(value, dict)
1990
 
            self.assertEqual(expected_method_return[key], value)
1991
 
            self.assertNotIsInstance(key, ObjectPath)
1992
 
            for inner_key, inner_value in value.items():
1993
 
                self.assertIsInstance(value, dict)
1994
 
                self.assertEqual(
1995
 
                    expected_method_return[key][inner_key],
1996
 
                    inner_value)
1997
 
                self.assertNotIsInstance(key, ObjectPath)
1998
 
 
1999
 
    def test_call_method_filters_objectpaths_in_dict_three_deep(self):
2000
 
        ObjectPath = self.dummy_dbussy.DBUS.ObjectPath
2001
 
        def func():
2002
 
            return method_return
2003
 
        fake_ravel = self.fake_ravel_func(func)
2004
 
        bus = dbussy_adapter.SystemBus(self.dummy_dbussy, fake_ravel)
2005
 
        method_return = {
2006
 
            ObjectPath("key1"): {
2007
 
                ObjectPath("key2"): {
2008
 
                    ObjectPath("key3"): ObjectPath("value"),
2009
 
                },
2010
 
            },
2011
 
        }
2012
 
        ret = self.call_method(bus, "methodname", "busname",
2013
 
                               "objectpath", "interface")
2014
 
        expected_method_return = {"key1": {"key2": {"key3": "value"}}}
2015
 
        self.assertEqual(expected_method_return, ret)
2016
 
        self.assertIsInstance(ret, dict)
2017
 
        self.assertNotIsInstance(next(iter(ret.keys())), ObjectPath)
2018
 
        self.assertIsInstance(ret["key1"], dict)
2019
 
        self.assertNotIsInstance(next(iter(ret["key1"].keys())),
2020
 
                                 ObjectPath)
2021
 
        self.assertIsInstance(ret["key1"]["key2"], dict)
2022
 
        self.assertNotIsInstance(
2023
 
            next(iter(ret["key1"]["key2"].keys())),
2024
 
            ObjectPath)
2025
 
        self.assertEqual("value", ret["key1"]["key2"]["key3"])
2026
 
        self.assertNotIsInstance(ret["key1"]["key2"]["key3"],
2027
 
                                 self.dummy_dbussy.DBUS.ObjectPath)
2028
 
 
2029
 
    def test_call_method_handles_exception(self):
2030
 
        def func():
2031
 
            raise self.dummy_dbussy.DBusError()
2032
 
 
2033
 
        fake_ravel = self.fake_ravel_func(func)
2034
 
        bus = dbussy_adapter.SystemBus(self.dummy_dbussy, fake_ravel)
2035
 
 
2036
 
        with self.assertRaises(dbus.Error) as e:
2037
 
            self.call_method(bus, "methodname", "busname",
2038
 
                             "objectpath", "interface")
2039
 
 
2040
 
        self.assertNotIsInstance(e.exception, dbus.ConnectFailed)
2041
 
 
2042
 
    def test_get_object_converts_to_correct_exception(self):
2043
 
        class fake_ravel_raises_exception_on_connect:
2044
 
            @staticmethod
2045
 
            def system_bus():
2046
 
                class Bus:
2047
 
                    @staticmethod
2048
 
                    def __getitem__(key):
2049
 
                        if key == "objectpath":
2050
 
                            raise self.dummy_dbussy.DBusError()
2051
 
                        raise Exception(key)
2052
 
                return {"busname": Bus()}
2053
 
        def func():
2054
 
            raise self.dummy_dbussy.DBusError()
2055
 
        bus = dbussy_adapter.SystemBus(
2056
 
            self.dummy_dbussy,
2057
 
            fake_ravel_raises_exception_on_connect)
2058
 
        with self.assertRaises(dbus.ConnectFailed):
2059
 
            self.call_method(bus, "methodname", "busname",
2060
 
                             "objectpath", "interface")
2061
 
 
2062
 
 
2063
1774
class Test_commands_from_options(unittest.TestCase):
2064
1775
 
2065
1776
    def setUp(self):