Skip warning test on older version of python

due to pytest bug pytest-dev/pytest#840

Author: sloria

tasks.py

@@ -33,6 +33,7 @@ def flake():
             os.path.join('webargs', 'async.py'),
             os.path.join('webargs', 'aiohttpparser.py'),
             os.path.join('examples', 'annotations_example.py'),
+            'build',
         ]
         cmd += ' --exclude={0}'.format(','.join(excludes))
     run(cmd, echo=True)

tests/test_core.py

@@ -519,10 +519,17 @@ def viewfunc(email, password):
             return {'email': email, 'password': password}
         assert viewfunc() == {'email': '[email protected]', 'password': 'bar'}
 
+    # Must skip on older versions of python due to
+    # https://github.com/pytest-dev/pytest/issues/840
+    @pytest.mark.skipif(sys.version_info < (3, 4),
+                        reason="Skipping due to a bug in pytest's warning recording")
     def test_warning_raised_if_schema_is_not_in_strict_mode(
-            self, web_request, parser, recwarn):
-        parser.parse(self.UserSchema(strict=False), web_request)
-        warning = recwarn.pop(UserWarning)
+        self, web_request, parser
+    ):
+
+        with pytest.warns(UserWarning) as record:
+            parser.parse(self.UserSchema(strict=False), web_request)
+        warning = record[0]
         assert 'strict=True' in str(warning.message)
 
     def test_use_kwargs_stacked(self, web_request, parser):

tox.ini

@@ -4,7 +4,6 @@ envlist =py26,py27,py33,py34,py35
 deps=
   py26: ordereddict
   -rdev-requirements.txt
+  {py34,py35}: -rdev-requirements.txt
 commands=
-    flake8 webargs
-    py.test
-
+  invoke test