fix "py.cleanup -d" - add test and check to only remove empty dirs (!)

--HG--
branch : trunk

_py/cmdline/pycleanup.py

@@ -35,6 +35,7 @@ def main():
     if options.removedir:
         for x in path.visit(lambda x: x.check(dir=1), 
                             lambda x: x.check(dotfile=0, link=0)):
+            if not x.listdir():
                 remove(x, options)
 
 def remove(path, options):

testing/cmdline/test_cmdline.py

@@ -38,12 +38,14 @@ class TestPyCleanup:
         result = testdir.runpybin("py.cleanup", tmpdir)
         assert not pyc.check()
 
-    def test_dir_remove(self, testdir, tmpdir):
-        p = tmpdir.mkdir("a")
-        result = testdir.runpybin("py.cleanup", tmpdir)
+    def test_dir_remove_simple(self, testdir, tmpdir):
+        subdir = tmpdir.mkdir("subdir")
+        p = subdir.ensure("file")
+        result = testdir.runpybin("py.cleanup", "-d", tmpdir)
         assert result.ret == 0
-        assert p.check()
+        assert subdir.check()
+        p.remove()
+        p = tmpdir.mkdir("hello")
         result = testdir.runpybin("py.cleanup", tmpdir, '-d')
         assert result.ret == 0
-        assert not p.check()
-        
+        assert not subdir.check()