add deprecation.argument_removed

1 files changed, 11 insertions, 0 deletions

diff --git a/test/unittest_deprecation.py b/test/unittest_deprecation.py
index 7881252..60b10f4 100644
--- a/test/unittest_deprecation.py
+++ b/test/unittest_deprecation.py
@@ -107,6 +107,17 @@ class RawInputTC(TestCase):
         with self.assertRaises(ValueError):
             some_function(new=42, old=42)
 
+    def test_argument_removed(self):
+        @deprecation.argument_removed("old")
+        def some_function(new):
+            return new
+
+        self.assertEqual(some_function(new=42), 42)
+        self.assertEqual(some_function(new=10, old=20), 10)
+        self.assertEqual(self.messages,
+                         ['argument old of callable some_function has been removed and is '
+                          'deprecated'])
+
     def test_renamed(self):
         def any_func():
             pass