handle ValueError Exception via Gnome import; refs #75

apprise/plugins/NotifyGnome.py

@@ -47,10 +47,13 @@ try:
     # We're good to go!
     NOTIFY_GNOME_SUPPORT_ENABLED = True
 
-except ImportError:
+except (ImportError, ValueError):
     # No problem; we just simply can't support this plugin; we could
     # be in microsoft windows, or we just don't have the python-gobject
     # library available to us (or maybe one we don't support)?
+
+    # Alternativey A ValueError will get thrown upon calling
+    # gi.require_version() if the requested Notify namespace isn't available
     pass
 
 

test/test_glib_plugin.py

@@ -260,3 +260,34 @@ def test_dbus_plugin(mock_mainloop, mock_byte, mock_bytearray,
     # Our notification succeeds even though the gi library was not loaded
     assert(obj.notify(title='title', body='body',
            notify_type=apprise.NotifyType.INFO) is True)
+
+    # Force a global import error
+    _session_bus = sys.modules['dbus']
+    sys.modules['dbus'] = compile('raise ImportError()', 'dbus', 'exec')
+
+    # Reload our modules
+    reload(sys.modules['apprise.plugins.NotifyDBus'])
+    reload(sys.modules['apprise.plugins'])
+    reload(sys.modules['apprise.Apprise'])
+    reload(sys.modules['apprise'])
+
+    # Create our instance
+    obj = apprise.Apprise.instantiate('glib://', suppress_exceptions=False)
+    assert(isinstance(obj, apprise.plugins.NotifyDBus) is True)
+    obj.duration = 0
+
+    # Test url() call
+    assert(compat_is_basestring(obj.url()) is True)
+
+    # Our notification fail because the dbus library wasn't present
+    assert(obj.notify(title='title', body='body',
+           notify_type=apprise.NotifyType.INFO) is False)
+
+    # Since playing with the sys.modules is not such a good idea,
+    # let's just put it back now :)
+    sys.modules['dbus'] = _session_bus
+    # Reload our modules
+    reload(sys.modules['apprise.plugins.NotifyDBus'])
+    reload(sys.modules['apprise.plugins'])
+    reload(sys.modules['apprise.Apprise'])
+    reload(sys.modules['apprise'])

test/test_gnome_plugin.py

@@ -153,3 +153,31 @@ def test_gnome_plugin():
 
     # Test the setting of a the urgency
     apprise.plugins.NotifyGnome(urgency=0)
+
+    # Verify this all works in the event a ValueError is also thronw
+    # out of the call to gi.require_version()
+
+    # Emulate require_version function:
+    gi.require_version.side_effect = ValueError()
+
+    # The following libraries need to be reloaded to prevent
+    #  TypeError: super(type, obj): obj must be an instance or subtype of type
+    #  This is better explained in this StackOverflow post:
+    #     https://stackoverflow.com/questions/31363311/\
+    #       any-way-to-manually-fix-operation-of-\
+    #          super-after-ipython-reload-avoiding-ty
+    #
+    reload(sys.modules['apprise.plugins.NotifyGnome'])
+    reload(sys.modules['apprise.plugins'])
+    reload(sys.modules['apprise.Apprise'])
+    reload(sys.modules['apprise'])
+
+    # Create our instance
+    obj = apprise.Apprise.instantiate('gnome://', suppress_exceptions=False)
+    assert(isinstance(obj, apprise.plugins.NotifyGnome) is True)
+    obj.duration = 0
+
+    # Our notifications can not work without our gi library having been
+    # loaded.
+    assert(obj.notify(title='title', body='body',
+           notify_type=apprise.NotifyType.INFO) is False)