Replace LOG.warn

The warn method is deprecated in favor of the warning method.

Change-Id: If7b6bcc4fa6c991f784884feeacb2b20dd2109e6
Signed-off-by: Takashi Kajinami <kajinamit@oss.nttdata.com>

HACKING.rst

@@ -3,3 +3,4 @@ Trove Library Specific Commandments
 
 - [T103] Exception messages should be translated
 - [T105] Validate no LOG translations
+- [T106] LOG.warn() is not allowed. Use LOG.warning()

tox.ini

@@ -77,6 +77,7 @@ import_exceptions = trove.common.i18n
 extension =
     # T103= checks:check_raised_localized_exceptions
     T105 = checks:no_translate_logs
+    T106 = checks:no_log_warn
 paths = ./trove/hacking
 
 [testenv:api-ref]

trove/cmd/guest.py

@@ -76,9 +76,9 @@ def main():
         try:
             guestagent_utils.disable_user_defined_port()
         except Exception as e:
-            LOG.warn("failed to down the user defined port when "
-                     "network_isolation is set to true due to: %s."
-                     "pass...", str(e))
+            LOG.warning("failed to down the user defined port when "
+                        "network_isolation is set to true due to: %s."
+                        "pass...", str(e))
             pass
 
     # Create user and group for running docker container.

trove/hacking/checks.py

@@ -75,3 +75,15 @@ def no_translate_logs(logical_line, filename, noqa):
     msg = "T105: Log message shouldn't be translated."
     if _translated_log.match(logical_line):
         yield (0, msg)
+
+
+@core.flake8ext
+def no_log_warn(logical_line):
+    """Disallow 'LOG.warn('
+
+    https://bugs.launchpad.net/tempest/+bug/1508442
+
+    T106
+    """
+    if logical_line.startswith('LOG.warn('):
+        yield (0, 'T106 Use LOG.warning() rather than LOG.warn()')

trove/tests/unittests/hacking/test_check.py

@@ -70,3 +70,9 @@ class HackingTestCase(trove_testtools.TestCase):
         f = tc.check_raised_localized_exceptions
         self.assertLinePasses(f, "raise KeyError('Error text')",
                               'neutron_lib/tests/unit/mytest.py')
+
+    def test_no_log_warn(self):
+        self.assertEqual(1, len(list(tc.no_log_warn(
+            "LOG.warn(\"LOG.warn is deprecated\")"))))
+        self.assertEqual(0, len(list(tc.no_log_warn(
+            "LOG.warning(\"LOG.warn is deprecated\")"))))