Delete redundant period in ManilaException messages

--Delete redundant period in the command echo.

Change-Id: I0081643b0ba432b327a22473856d06b63f307873
Closes-Bug: #1466062

manila/exception.py

@@ -21,6 +21,7 @@ Includes decorator for re-raising Manila-type exceptions.
 SHOULD include dedicated exception logging.
 
 """
+import re
 
 from oslo_concurrency import processutils
 from oslo_config import cfg
@@ -103,6 +104,8 @@ class ManilaException(Exception):
         elif isinstance(message, Exception):
             message = six.text_type(message)
 
+        if re.match('.*[^\.]\.\.$', message):
+            message = message[:-1]
         self.msg = message
         super(ManilaException, self).__init__(message)
 

manila/tests/test_exception.py

@@ -15,6 +15,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+import ddt
 import six
 
 from manila import exception
@@ -38,6 +39,7 @@ class FakeNotifier(object):
         self.provided_payload = payload
 
 
+@ddt.ddt
 class ManilaExceptionTestCase(test.TestCase):
     def test_default_error_msg(self):
         class FakeManilaException(exception.ManilaException):
@@ -104,6 +106,18 @@ class ManilaExceptionTestCase(test.TestCase):
         self.assertNotIn('foo_msg', exc.kwargs)
         self.assertNotIn('bar_msg', exc.kwargs)
 
+    @ddt.data("test message.", "test message....", ".")
+    def test_exception_not_redundant_period(self, msg):
+        exc1 = Exception(msg)
+        exc2 = exception.ManilaException(exc1)
+        self.assertEqual(msg, exc2.msg)
+
+    def test_exception_redundant_period(self):
+        msg = "test message.."
+        exc1 = Exception(msg)
+        exc2 = exception.ManilaException(exc1)
+        self.assertEqual("test message.", exc2.msg)
+
 
 class ManilaExceptionResponseCode400(test.TestCase):