Test D100

Author: ziadsawalha

test.py

@@ -1,5 +1,5 @@
-"""Docstring."""
 # encoding: utf-8
+# No docstring, so we can test D100
 import sys
 
 
@@ -204,6 +204,7 @@ def foobar():
 def run():
     """Run the functions above and check errors agains expected errors."""
     import pep257
+    expect(__file__, 'D100: Docstring missing')
     results = list(pep257.check([__file__]))
     assert set(map(type, results)) == set([pep257.Error]), results
     results = set([(e.definition.name, e.message) for e in results])