~bzr-pqm/bzr/bzr.dev

# Copyright (C) 2010, 2011 Canonical Ltd

#

# 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

import threading

from bzrlib import (

    tests,

    thread,

    )

class TestThreadWithException(tests.TestCase):

    def test_start_and_join_smoke_test(self):

        def do_nothing():

            pass

        tt = thread.ThreadWithException(target=do_nothing)

        tt.start()

        tt.join()

    def test_exception_is_re_raised(self):

        class MyException(Exception):

            pass

        def raise_my_exception():

            raise MyException()

        tt = thread.ThreadWithException(target=raise_my_exception)

        tt.start()

        self.assertRaises(MyException, tt.join)

    def test_join_when_no_exception(self):

        resume = threading.Event()

        class MyException(Exception):

            pass

        def raise_my_exception():

            # Wait for the test to tell us to resume

            resume.wait()

            # Now we can raise

            raise MyException()

        tt = thread.ThreadWithException(target=raise_my_exception)

        tt.start()

        tt.join(timeout=0)

        self.assertIs(None, tt.exception)

        resume.set()

        self.assertRaises(MyException, tt.join)