fix Wadsworth's Constant edge case and add test

modules/test/test_wadsworth.py

@@ -0,0 +1,21 @@
+"""
+test_nsfw.py - some things just aren't safe for work, the test cases
+author: mutantmonkey <mutantmonkey@mutantmonkey.in>
+"""
+
+import re
+import unittest
+from mock import MagicMock, Mock
+from modules.wadsworth import wadsworth
+
+
+class TestWadsworth(unittest.TestCase):
+    def setUp(self):
+        self.phenny = MagicMock()
+
+    def test_wadsworth(self):
+        input = Mock(group=lambda x: "Apply Wadsworth's Constant to a string")
+        wadsworth(self.phenny, input)
+
+        self.phenny.say.assert_called_once_with(
+                "Constant to a string")