mountfs fix and test

Author: willmcgugan

fs/mountfs.py

@@ -154,12 +154,12 @@ def gettext(self, path, encoding=None, errors=None, newline=None):
     def getsize(self, path):
         self.check()
         fs, _path = self._delegate(path)
-        return fs.getsize(path)
+        return fs.getsize(_path)
 
     def getsyspath(self, path):
         self.check()
         fs, _path = self._delegate(path)
-        return fs.getsyspath(path)
+        return fs.getsyspath(_path)
 
     def gettype(self, path):
         self.check()
@@ -194,7 +194,7 @@ def scandir(self, path, namespaces=None, page=None):
     def setinfo(self, path, info):
         self.check()
         fs, _path = self._delegate(path)
-        return fs.setinfo(path, info)
+        return fs.setinfo(_path, info)
 
     def validatepath(self, path):
         self.check()
@@ -225,12 +225,12 @@ def open(self,
     def setbinfile(self, path, file):
         self.check()
         fs, _path = self._delegate(path)
-        return fs.setbinfile(path, file)
+        return fs.setbinfile(_path, file)
 
     def setbytes(self, path, contents):
         self.check()
         fs, _path = self._delegate(path)
-        return fs.setbytes(path, contents)
+        return fs.setbytes(_path, contents)
 
     def settext(self,
                 path,

tests/test_mountfs.py

@@ -18,6 +18,16 @@ def make_fs(self):
         return fs
 
 
+class TestMountFS2(FSTestCases, unittest.TestCase):
+    """Test OSFS implementation."""
+
+    def make_fs(self):
+        fs = MountFS()
+        mem_fs = MemoryFS()
+        fs.mount('/foo', mem_fs)
+        return fs.opendir('foo')
+
+
 class TestMountFSBehaviours(unittest.TestCase):
 
     def test_listdir(self):