# This file is part of Buildbot.  Buildbot 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, version 2.
#
# 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.
#
# Copyright Buildbot Team Members

from unittest import mock

from twisted.internet import defer
from twisted.trial import unittest

from buildbot.mq import simple
from buildbot.test.fake import fakemaster
from buildbot.test.reactor import TestReactorMixin


class SimpleMQ(TestReactorMixin, unittest.TestCase):
    @defer.inlineCallbacks
    def setUp(self):
        self.setup_test_reactor()
        self.master = fakemaster.make_master(self)
        self.mq = simple.SimpleMQ()
        self.mq.setServiceParent(self.master)
        yield self.mq.startService()

    @defer.inlineCallbacks
    def tearDown(self):
        if self.mq.running:
            yield self.mq.stopService()

    @defer.inlineCallbacks
    def test_forward_data(self):
        callback = mock.Mock()
        yield self.mq.startConsuming(callback, ('a', 'b'))
        # _produce returns a deferred
        yield self.mq.produce(('a', 'b'), 'foo')
        # calling produce should eventually call the callback with decoding of
        # topic
        callback.assert_called_with(('a', 'b'), 'foo')

    @defer.inlineCallbacks
    def test_forward_data_wildcard(self):
        callback = mock.Mock()
        yield self.mq.startConsuming(callback, ('a', None))
        # _produce returns a deferred
        yield self.mq.produce(('a', 'b'), 'foo')
        # calling produce should eventually call the callback with decoding of
        # topic
        callback.assert_called_with(('a', 'b'), 'foo')

    @defer.inlineCallbacks
    def test_waits_for_called_callback(self):
        def callback(_, __):
            return defer.succeed(None)

        yield self.mq.startConsuming(callback, ('a', None))
        yield self.mq.produce(('a', 'b'), 'foo')

        d = self.mq.stopService()
        self.assertTrue(d.called)

    @defer.inlineCallbacks
    def test_waits_for_non_called_callback(self):
        d1 = defer.Deferred()

        def callback(_, __):
            return d1

        yield self.mq.startConsuming(callback, ('a', None))
        yield self.mq.produce(('a', 'b'), 'foo')

        d = self.mq.stopService()
        self.assertFalse(d.called)
        d1.callback(None)
        self.assertTrue(d.called)
