Merge pull request #28 from di/add-is-package

Add _is_package

vladiate/main.py

@@ -71,6 +71,16 @@ def is_vlad(tup):
         hasattr(item, "validators") and not name.startswith('_'))
 
 
+def _is_package(path):
+    """
+    Is the given path a Python package?
+    """
+    return (
+        os.path.isdir(path)
+        and os.path.exists(os.path.join(path, '__init__.py'))
+    )
+
+
 def find_vladfile(vladfile, path='.'):
     """
     Attempt to locate a vladfile, either explicitly or by searching parent dirs.

vladiate/test/test_main.py

@@ -6,7 +6,8 @@
 from pretend import stub, call, call_recorder
 
 from ..main import (  # NOQA
-    parse_args, is_vlad, find_vladfile, load_vladfile, _vladiate, main, run
+    parse_args, is_vlad, find_vladfile, load_vladfile, _vladiate, main, run,
+    _is_package
 )
 
 from ..vlad import Vlad
@@ -286,3 +287,11 @@ def test_main_no_vladfile(monkeypatch):
         'vladiate.main.find_vladfile', lambda *args, **kwargs: None
     )
     assert main() == os.EX_NOINPUT
+
+
+@pytest.mark.parametrize('path, expected', [
+    ('foo/bar', False),
+    ('vladiate/test', True),
+])
+def test_is_package(path, expected):
+    assert _is_package(path) == expected