openlp/tests/openlp_core/test_threading.py

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# -*- coding: utf-8 -*-
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##########################################################################
# OpenLP - Open Source Lyrics Projection #
# ---------------------------------------------------------------------- #
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# Copyright (c) 2008-2021 OpenLP Developers #
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# ---------------------------------------------------------------------- #
# 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 3 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, see <https://www.gnu.org/licenses/>. #
##########################################################################
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"""
Package to test the openlp.core.threading package.
"""
from inspect import isfunction
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from unittest.mock import MagicMock, call, patch
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from openlp.core.threading import ThreadWorker, get_thread_worker, is_thread_finished, make_remove_thread, run_thread
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def test_run_thread_no_name():
"""
Test that trying to run a thread without a name results in an exception being thrown
"""
# GIVEN: A fake worker
# WHEN: run_thread() is called without a name
try:
run_thread(MagicMock(), '')
assert False, 'A ValueError should have been thrown to prevent blank names'
except ValueError:
# THEN: A ValueError should have been thrown
assert True, 'A ValueError was correctly thrown'
@patch('openlp.core.threading.Registry')
def test_run_thread_exists(MockRegistry):
"""
Test that trying to run a thread with a name that already exists will throw a KeyError
"""
# GIVEN: A mocked registry with a main window object
mocked_application = MagicMock()
mocked_application.worker_threads = {'test_thread': MagicMock()}
MockRegistry.return_value.get.return_value = mocked_application
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# WHEN: run_thread() is called
try:
run_thread(MagicMock(), 'test_thread')
assert False, 'A KeyError should have been thrown to show that a thread with this name already exists'
except KeyError:
assert True, 'A KeyError was correctly thrown'
@patch('openlp.core.threading.QtCore.QThread')
@patch('openlp.core.threading.Registry')
def test_run_thread(MockRegistry, MockQThread):
"""
Test that running a thread works correctly
"""
# GIVEN: A mocked registry with a main window object
mocked_application = MagicMock()
mocked_application.worker_threads = {}
MockRegistry.return_value.get.return_value = mocked_application
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# WHEN: run_thread() is called
run_thread(MagicMock(), 'test_thread')
# THEN: The thread should be in the threads list and the correct methods should have been called
assert len(mocked_application.worker_threads.keys()) == 1, 'There should be 1 item in the list of threads'
assert list(mocked_application.worker_threads.keys()) == ['test_thread'], \
'The test_thread item should be in the list'
mocked_worker = mocked_application.worker_threads['test_thread']['worker']
mocked_thread = mocked_application.worker_threads['test_thread']['thread']
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mocked_worker.moveToThread.assert_called_once_with(mocked_thread)
mocked_thread.started.connect.assert_called_once_with(mocked_worker.start)
expected_quit_calls = [call(mocked_thread.quit), call(mocked_worker.deleteLater)]
assert mocked_worker.quit.connect.call_args_list == expected_quit_calls, \
'The workers quit signal should be connected twice'
assert mocked_thread.finished.connect.call_args_list[0] == call(mocked_thread.deleteLater), \
'The threads finished signal should be connected to its deleteLater slot'
assert mocked_thread.finished.connect.call_count == 2, 'The signal should have been connected twice'
mocked_thread.start.assert_called_once_with()
def test_thread_worker():
"""
Test that creating a thread worker object and calling start throws and NotImplementedError
"""
# GIVEN: A ThreadWorker class
worker = ThreadWorker()
try:
# WHEN: calling start()
worker.start()
assert False, 'A NotImplementedError should have been thrown'
except NotImplementedError:
# A NotImplementedError should be thrown
pass
except Exception:
assert False, 'A NotImplementedError should have been thrown'
@patch('openlp.core.threading.Registry')
def test_get_thread_worker(MockRegistry):
"""
Test that calling the get_thread_worker() function returns the correct worker
"""
# GIVEN: A mocked thread worker
mocked_worker = MagicMock()
MockRegistry.return_value.get.return_value.worker_threads = {'test_thread': {'worker': mocked_worker}}
# WHEN: get_thread_worker() is called
worker = get_thread_worker('test_thread')
# THEN: The mocked worker is returned
assert worker is mocked_worker, 'The mocked worker should have been returned'
@patch('openlp.core.threading.Registry')
def test_get_thread_worker_mising(MockRegistry):
"""
Test that calling the get_thread_worker() function raises a KeyError if it does not exist
"""
# GIVEN: A mocked thread worker
MockRegistry.return_value.get.return_value.worker_threads = {}
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# WHEN: get_thread_worker() is called
result = get_thread_worker('test_thread')
# THEN: None should have been returned
assert result is None
@patch('openlp.core.threading.Registry')
def test_is_thread_finished(MockRegistry):
"""
Test the is_thread_finished() function
"""
# GIVEN: A mock thread and worker
mocked_thread = MagicMock()
mocked_thread.isFinished.return_value = False
MockRegistry.return_value.get.return_value.worker_threads = {'test': {'thread': mocked_thread}}
# WHEN: is_thread_finished() is called
result = is_thread_finished('test')
# THEN: The result should be correct
assert result is False, 'is_thread_finished should have returned False'
@patch('openlp.core.threading.Registry')
def test_is_thread_finished_missing(MockRegistry):
"""
Test that calling the is_thread_finished() function returns True if the thread doesn't exist
"""
# GIVEN: A mocked thread worker
MockRegistry.return_value.get.return_value.worker_threads = {}
# WHEN: get_thread_worker() is called
result = is_thread_finished('test_thread')
# THEN: The result should be correct
assert result is True, 'is_thread_finished should return True when a thread is missing'
def test_make_remove_thread():
"""
Test the make_remove_thread() function
"""
# GIVEN: A thread name
thread_name = 'test_thread'
# WHEN: make_remove_thread() is called
rm_func = make_remove_thread(thread_name)
# THEN: The result should be a function
assert isfunction(rm_func), 'make_remove_thread should return a function'
assert rm_func.__name__ == 'remove_thread'