Add test ref #261.

setuptools/tests/test_build_py.py

+import os
+
+import pytest
+
+from setuptools.dist import Distribution
+
+
+@pytest.yield_fixture
+def tmpdir_as_cwd(tmpdir):
+    with tmpdir.as_cwd():
+        yield tmpdir
+
+
+def test_directories_in_package_data_glob(tmpdir_as_cwd):
+    """
+    Directories matching the glob in package_data should
+    not be included in the package data.
+
+    Regression test for #261.
+    """
+    dist = Distribution(dict(
+        script_name='setup.py',
+        script_args=['build_py'],
+        packages=[''],
+        name='foo',
+        package_data={'': ['path/*']},
+    ))
+    os.makedirs('path/subpath')
+    #with contexts.quiet():
+    dist.parse_command_line()
+    dist.run_commands()