Expose .closed as a public property on SFTP file handles

Changelog.rst

@@ -11,6 +11,8 @@ Changes
 * Added `ssh2.session.Session.flag` function for enabling/disabling session flags like compression support.
 * Added `ssh2.session.userauth_keyboardinteractive_callback` for authentication using Python callback function,
   for example for Oauth and other two-factor (2FA) or more factor authentication. Thanks @MattCatz .
+* `ssh2.sftp_handle.SFTPHandle.closed` is now a public property indicating whether `ssh2.sftp_handle.SFTPHandle.close`
+  was called on a `SFTPHandle` or not.
 
 
 1.1.2

ci/integration_tests/test_sftp.py

@@ -45,10 +45,13 @@ def test_sftp_read(self):
                 remote_data = b""
                 for rc, data in remote_fh:
                     remote_data += data
+                self.assertFalse(remote_fh.closed)
                 self.assertEqual(remote_fh.close(), 0)
+                self.assertTrue(remote_fh.closed)
                 self.assertEqual(remote_data, test_file_data)
             finally:
                 os.unlink(remote_filename)
+        self.assertTrue(remote_fh.closed)
 
     def test_sftp_write(self):
         self.assertEqual(self._auth(), 0)
@@ -65,6 +68,8 @@ def test_sftp_write(self):
                        LIBSSH2_FXF_CREAT | LIBSSH2_FXF_WRITE,
                        mode) as remote_fh:
             remote_fh.write(data)
+            self.assertFalse(remote_fh.closed)
+        self.assertTrue(remote_fh.closed)
         with open(remote_filename, 'rb') as fh:
             written_data = fh.read()
         _stat = os.stat(remote_filename)