Merge pull request #699 from eamanu/fix-688

Add a assertWarns to avoid unnecessary messages.

tests/test_date.py

@@ -302,7 +302,10 @@ def test_should_use_correct_day_from_settings_for_dates_without_day(
         param(date_string='25-03-14', date_formats='%d-%m-%y', expected_result=datetime(2014, 3, 25)),
     ])
     def test_should_support_a_string_as_date_formats(self, date_string, date_formats, expected_result):
-        self.when_date_is_parsed_with_formats(date_string, date_formats)
+        if six.PY2:
+            self.when_date_is_parsed_with_formats(date_string, date_formats)
+        else:
+            self.when_date_is_parsed_with_formats_and_raise_warn(date_string, date_formats)
         self.then_date_was_parsed()
         self.then_parsed_period_is('day')
         self.then_parsed_date_is(expected_result)
@@ -319,6 +322,11 @@ def given_now(self, year, month, day, **time):
     def when_date_is_parsed_with_formats(self, date_string, date_formats, custom_settings=None):
         self.result = date.parse_with_formats(date_string, date_formats, custom_settings or settings)
 
+    def when_date_is_parsed_with_formats_and_raise_warn(self, date_string, date_formats, custom_settings=None):
+        # Just available for Python 3
+        with self.assertWarns(FutureWarning):
+            self.result = date.parse_with_formats(date_string, date_formats, custom_settings or settings)
+
     def then_date_was_not_parsed(self):
         self.assertIsNotNone(self.result)
         self.assertIsNone(self.result['date_obj'])