# libguestfs Python bindings
# Copyright (C) 2011 Red Hat Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

# Test implicit vs explicit closes of the handle (RHBZ#717786).

import unittest
import guestfs

close_invoked = 0


def close_callback(ev, eh, buf, array):
    global close_invoked
    close_invoked += 1


class Test800ExplicitClose(unittest.TestCase):
    def test_explicit_close(self):
        g = guestfs.GuestFS(python_return_dict=True)

        g.close()               # explicit close
        del g                   # implicit close - should be no error/warning

        # Expect an exception if we call a method on a closed handle.
        g = guestfs.GuestFS(python_return_dict=True)
        g.close()
        self.assertRaises(guestfs.ClosedHandle, g.set_memsize, 512)
        del g

        # Verify that the handle is really being closed by g.close, by
        # setting up a close event and testing that it happened.
        g = guestfs.GuestFS(python_return_dict=True)

        g.set_event_callback(close_callback, guestfs.EVENT_CLOSE)

        self.assertEqual(close_invoked, 0)
        g.close()
        self.assertEqual(close_invoked, 1)

        del g
        self.assertEqual(close_invoked, 1)