6 files changed, 90 insertions, 8 deletions
diff --git a/src/mailman/app/commands.py b/src/mailman/app/commands.py
index 45afe230e..35158da2a 100644
--- a/src/mailman/app/commands.py
+++ b/src/mailman/app/commands.py
@@ -35,6 +35,6 @@ def initialize():
         command = command_class()
         verifyObject(IEmailCommand, command)
         assert command_class.name not in config.commands, (
-            'Duplicate email command "{0}" found in {1}'.format(
+            'Duplicate email command "{}" found in {}'.format(
                 command_class.name, command_class.__module__))
         config.commands[command_class.name] = command_class()
diff --git a/src/mailman/chains/base.py b/src/mailman/chains/base.py
index 911703ae9..a2266cf38 100644
--- a/src/mailman/chains/base.py
+++ b/src/mailman/chains/base.py
@@ -71,7 +71,7 @@ class TerminalChainBase:
         :param msg: The message.
         :param msgdata: The message metadata.
         """
-        raise NotImplementedError                   # pragma: no cover
+        raise NotImplementedError
 
     def get_links(self, mlist, msg, msgdata):
         """See `IChain`."""
diff --git a/src/mailman/rest/helpers.py b/src/mailman/rest/helpers.py
index be5a4804b..8de2632bc 100644
--- a/src/mailman/rest/helpers.py
+++ b/src/mailman/rest/helpers.py
@@ -86,7 +86,7 @@ class ExtendedEncoder(json.JSONEncoder):
             # It's up to the decoding validator to associate this name with
             # the right Enum class.
             return obj.name
-        return json.JSONEncoder.default(self, obj)
+        return super().default(obj)
 
 
 def etag(resource):
@@ -130,7 +130,7 @@ class CollectionMixin:
         :return: The representation of the resource.
         :rtype: dict
         """
-        raise NotImplementedError                   # pragma: no cover
+        raise NotImplementedError
 
     def _resource_as_json(self, resource):
         """Return the JSON formatted representation of the resource."""
@@ -147,7 +147,7 @@ class CollectionMixin:
         :return: The collection
         :rtype: list
         """
-        raise NotImplementedError                   # pragma: no cover
+        raise NotImplementedError
 
     def _paginate(self, request, collection):
         """Method to paginate through collection result lists.
diff --git a/src/mailman/rest/members.py b/src/mailman/rest/members.py
index 791a24656..3b69042da 100644
--- a/src/mailman/rest/members.py
+++ b/src/mailman/rest/members.py
@@ -100,7 +100,7 @@ class MemberCollection(_MemberBase):
     """
     def _get_collection(self, request):
         """See `CollectionMixin`."""
-        raise NotImplementedError                   # pragma: no cover
+        raise NotImplementedError
 
     def on_get(self, request, response):
         """roster/[members|owners|moderators]"""
diff --git a/src/mailman/rest/tests/test_helpers.py b/src/mailman/rest/tests/test_helpers.py
new file mode 100644
index 000000000..cab1f06fa
--- /dev/null
+++ b/src/mailman/rest/tests/test_helpers.py
@@ -0,0 +1,82 @@
+# Copyright (C) 2016 by the Free Software Foundation, Inc.
+#
+# This file is part of GNU Mailman.
+#
+# GNU Mailman is free software: you can redistribute it and/or modify it under
+# the terms of the GNU General Public License as published by the Free
+# Software Foundation, either version 3 of the License, or (at your option)
+# any later version.
+#
+# GNU Mailman is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+# more details.
+#
+# You should have received a copy of the GNU General Public License along with
+# GNU Mailman.  If not, see <http://www.gnu.org/licenses/>.
+
+"""Additional tests for helpers."""
+
+__all__ = [
+    'TestHelpers',
+    ]
+
+
+import unittest
+
+from datetime import timedelta
+from mailman.rest import helpers
+from mailman.testing.layers import ConfigLayer
+
+
+class FakeResponse:
+    def __init__(self):
+        self.body = 'not set'
+
+
+class Unserializable:
+    pass
+
+
+
+class TestHelpers(unittest.TestCase):
+    layer = ConfigLayer
+
+    def test_not_found_body_is_none(self):
+        response = FakeResponse()
+        helpers.not_found(response, body=None)
+        self.assertEqual(response.body, 'not set')
+
+    def test_accepted_body_is_not_none(self):
+        response = FakeResponse()
+        helpers.accepted(response, body='set')
+        self.assertEqual(response.body, 'set')
+
+    def test_bad_request_body_is_none(self):
+        response = FakeResponse()
+        helpers.bad_request(response, body=None)
+        self.assertEqual(response.body, 'not set')
+
+    def test_conflict_body_is_none(self):
+        response = FakeResponse()
+        helpers.conflict(response, body=None)
+        self.assertEqual(response.body, 'not set')
+
+    def test_forbidden_body_is_none(self):
+        response = FakeResponse()
+        helpers.forbidden(response, body=None)
+        self.assertEqual(response.body, 'not set')
+
+    def test_json_encoding_datetime_seconds(self):
+        resource = dict(interval=timedelta(seconds=2))
+        unjson = eval(helpers.etag(resource))
+        self.assertEqual(unjson['interval'], '0d2.0s')
+
+    def test_json_encoding_datetime_microseconds(self):
+        resource = dict(interval=timedelta(microseconds=2))
+        unjson = eval(helpers.etag(resource))
+        self.assertEqual(unjson['interval'], '0d2e-06s')
+
+    def test_json_encoding_default(self):
+        resource = dict(interval=Unserializable())
+        self.assertRaises(TypeError, helpers.etag, resource)
diff --git a/src/mailman/utilities/uid.py b/src/mailman/utilities/uid.py
index d2747df9d..e49b3d8dd 100644
--- a/src/mailman/utilities/uid.py
+++ b/src/mailman/utilities/uid.py
@@ -89,7 +89,7 @@ class _PredictableIDGenerator:
         The type of the returned id is intended to be the type that
         makes sense for the subclass overriding this method.
         """
-        raise NotImplementedError                   # pragma: no cover
+        raise NotImplementedError
 
     def _next_predictable_id(self):
         """Generate a predictable id for when Mailman being tested.
@@ -97,7 +97,7 @@ class _PredictableIDGenerator:
         The type of the returned id is intended to be the type that
         makes sense for the subclass overriding this method.
         """
-        raise NotImplementedError                   # pragma: no cover
+        raise NotImplementedError
 
     def _next_id(self):
         with self._lock: