Added a test.

Author: Nurdok

pep257.py

@@ -141,6 +141,11 @@ def __str__(self):
         return 'at module level'
 
 
+class Package(Module):
+
+    """A package is a __init__.py module."""
+
+
 class Function(Definition):
 
     _nest = staticmethod(lambda s: {'def': NestedFunction,

test_pep257.py

@@ -279,3 +279,13 @@ def foo():
         assert code == 0
         assert 'D301' not in err
         assert 'D302' not in err
+
+
+def test_missing_docstring_in_package():
+    with Pep257Env() as env:
+        with env.open('__init__.py', 'wt') as init:
+            pass  # an empty package file
+        out, err, code = env.invoke_pep257()
+        assert code == 1
+        assert 'D100' not in err  # shouldn't be treated as a module
+        assert 'D104' in err  # missing docstring in package