D-Bus testing: add unit tests for Session.GetDatabases

Add 4 unit tests for Session.GetDatabases:
1) Test the error is reported when the server name is empty
2) Test the error is reported when the given server does
not exist
3) Test nothing is returned when the given server exists
but it has no given source
4) Test when the given server exists and a correct source.
All work correctly.

test/test-dbus.py

@@ -345,6 +345,14 @@ class TestSessionAPIsEmptyName(unittest.TestCase, DBusUtil):
             self.failUnlessEqual(str(ex),
                                  "org.syncevolution.NoSuchConfig: Server name must be given")
 
+    def testGetDatabasesEmptyName(self):
+        """Test the error is reported when the server name is empty for GetDatabases"""
+        try:
+            self.session.GetDatabases("", utf8_strings=True)
+        except dbus.DBusException, ex:
+            self.failUnlessEqual(str(ex),
+                                 "org.syncevolution.NoSuchConfig: Server name must be given")
+
 class TestSessionAPIsDummy(unittest.TestCase, DBusUtil):
     """Tests that work for GetConfig/SetConfig/CheckSource/GetDatabases/GetReports in Session.
        This class is only working in a dummy config. Thus it can't do sync correctly. The purpose
@@ -526,6 +534,41 @@ class TestSessionAPIsDummy(unittest.TestCase, DBusUtil):
         except dbus.DBusException, ex:
             self.fail("check source is failed with exception: " + str(ex))
 
+    def testGetDatabasesNoConfig(self):
+        """ test the right error is reported when the server doesn't exist """
+        # make sure the config doesn't exist """
+        self.clearAllConfig()
+        try:
+            self.session.GetDatabases("", utf8_strings=True)
+        except dbus.DBusException, ex:
+            self.failUnlessEqual(str(ex),
+                                 "org.syncevolution.NoSuchConfig: No server 'dummy-test-for-config-purpose' found")
+
+    def testGetDatabasesEmpty(self):
+        """ test the empty is gotten for non-existing source """
+        self.setupConfig()
+        databases = self.session.GetDatabases("never_use_this_source_name", utf8_strings=True)
+        self.failUnlessEqual(databases, [])
+
+    def testGetDatabases(self):
+        """ test the right way to get databases """
+        self.setupConfig()
+
+        # don't know actual databases, so compare results of two different times
+        sources = ['addressbook', 'calendar', 'task', 'memo']
+        databases1 = []
+        for source in sources:
+            databases1.append(self.session.GetDatabases(source, utf8_strings=True))
+        # reverse the list of sources and get databases again
+        sources.reverse()
+        databases2 = []
+        for source in sources:
+            databases2.append(self.session.GetDatabases(source, utf8_strings=True))
+        # sort two arrays
+        databases1.sort()
+        databases2.sort()
+        self.failUnlessEqual(databases1, databases2)
+
 class TestDBusSync(unittest.TestCase, DBusUtil):
     """Executes a real sync."""