opener fix and tests

fs/opener.py

@@ -125,7 +125,7 @@ class _FSClosingFile(FileWrapper):
     """A file like object that closes its parent FS when closed itself"""
     def close(self):
         fs = getattr(self, '_closefs', None)
-        ret = super(_FSClosingFile).close()
+        ret = super(_FSClosingFile, self).close()
         if fs is not None:
             fs.close
         return ret

fs/tests/test_opener.py

+"""
+
+  fs.tests.test_opener:  testcases for FS opener
+
+"""
+
+import unittest
+import tempfile
+import shutil
+
+from fs.opener import opener
+from fs import path
+
+class TestOpener(unittest.TestCase):
+
+    def setUp(self):
+        self.temp_dir = tempfile.mkdtemp(u"fstest_opener")
+
+    def tearDown(self):
+        shutil.rmtree(self.temp_dir)
+
+    def testOpen(self):
+        filename = path.join(self.temp_dir, 'foo.txt')
+        file_object = opener.open(filename, 'wb')
+        file_object.close()
+        self.assertTrue(file_object.closed)
+
+
+
+
+
+