Use LOG.warning instead of deprecated LOG.warn

The LOG.warn method is deprecated[1] and the LOG.warning method should
be used instead.

[1] https://docs.python.org/3/library/logging.html#logging.warning

Change-Id: I43e2269d4b1c425119c86919eb869941d621c6de

1 files changed, 13 insertions, 0 deletions

diff --git a/tempest/hacking/checks.py b/tempest/hacking/checks.py
index c1e6b2d12..1c9c55b12 100644
--- a/tempest/hacking/checks.py
+++ b/tempest/hacking/checks.py
@@ -318,3 +318,16 @@ def negative_test_attribute_always_applied_to_negative_tests(physical_line,
                        " to all negative API tests"
                 )
             _HAVE_NEGATIVE_DECORATOR = False
+
+
+@core.flake8ext
+def no_log_warn(logical_line):
+    """Disallow 'LOG.warn('
+
+    Use LOG.warning() instead of Deprecated LOG.warn().
+    https://docs.python.org/3/library/logging.html#logging.warning
+    """
+
+    msg = ("T118: LOG.warn is deprecated, please use LOG.warning!")
+    if "LOG.warn(" in logical_line:
+        yield (0, msg)