Add HACKING.rst and hacking test case.

Currently, we have hacking check in kolla, but no place where we
can define hacking check rules. This patch adds HACKING.rst file
for that. And also add test cases for hacking.

Change-Id: I87f8768138d91bf6a5a1db91d37392f794f3f0ba

HACKING.rst

@@ -0,0 +1,13 @@
+Kolla Style Commandments
+============================
+
+- Step 1: Read the OpenStack Style Commandments
+  http://docs.openstack.org/developer/hacking/
+- Step 2: Read on
+
+
+Kolla Specific Commandments
+-------------------------------
+
+- [K301] Method's default argument shouldn't be mutable.
+- [K302] Use LOG.warning instead of LOG.warn.

kolla/hacking/checks.py

@@ -21,16 +21,16 @@ def no_log_warn(logical_line):
 
     Deprecated LOG.warn(), instead use LOG.warning
     https://bugs.launchpad.net/senlin/+bug/1508442
-    N352
+    K302
     """
 
-    msg = ("N352: LOG.warn is deprecated, please use LOG.warning!")
+    msg = ("K302: LOG.warn is deprecated, please use LOG.warning!")
     if "LOG.warn(" in logical_line:
         yield (0, msg)
 
 
 def no_mutable_default_args(logical_line):
-    msg = "N301: Method's default argument shouldn't be mutable!"
+    msg = "K301: Method's default argument shouldn't be mutable!"
     if mutable_default_args.match(logical_line):
         yield (0, msg)
 

kolla/tests/test_hacking.py

@@ -0,0 +1,46 @@
+#    Copyright 2016 GohighSec
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+import ddt
+
+from kolla.hacking import checks
+from kolla.tests import base
+
+
+@ddt.ddt
+class HackingTestCase(base.TestCase):
+    """Hacking test cases
+
+    This class tests the hacking checks in kolla.hacking.checks by passing
+    strings to the check methods like the pep8/flake8 parser would. The parser
+    loops over each line in the file and then passes the parameters to the
+    check method.
+    """
+
+    def test_no_log_warn_check(self):
+        self.assertEqual(0, len(list(checks.no_log_warn(
+            "LOG.warning('This should not trigger LOG.warn"
+            "hacking check.')"))))
+        self.assertEqual(1, len(list(checks.no_log_warn(
+            "LOG.warn('We should not use LOG.warn')"))))
+
+    def test_no_mutable_default_args(self):
+        self.assertEqual(1, len(list(checks.no_mutable_default_args(
+            "def get_info_from_bdm(virt_type, bdm, mapping=[])"))))
+
+        self.assertEqual(0, len(list(checks.no_mutable_default_args(
+            "defined = []"))))
+
+        self.assertEqual(0, len(list(checks.no_mutable_default_args(
+            "defined, undefined = [], {}"))))

test-requirements.txt

@@ -4,6 +4,7 @@
 bandit>=1.1.0 # Apache-2.0
 bashate>=0.2 # Apache-2.0
 beautifulsoup4 # MIT
+ddt>=1.0.1 # MIT
 doc8 # Apache-2.0
 extras # MIT
 graphviz!=0.5.0,>=0.4.0 # MIT License