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#
# Copyright 2020 Ettus Research, a National Instruments Brand
#
# SPDX-License-Identifier: GPL-3.0-or-later
#
import unittest
from base_tests import TestBase
from usrp_mpm import mpmutils
class MockLockable:
"""
Class which exposes whether lock() or unlock() have been called on it
"""
def __init__(self):
self.locked = False
def lock(self):
self.locked = True
def unlock(self):
self.locked = False
class TestMpmUtils(TestBase):
"""
Tests for the myriad utilities in mpmutils
"""
def test_normal_usage(self):
"""
Checks whether in normal operation the resource gets unlocked
"""
my_resource = MockLockable()
with mpmutils.lock_guard(my_resource):
self.assertEqual(my_resource.locked, True)
self.assertEqual(my_resource.locked, False)
def test_unlocks_after_exception(self):
"""
Checked whether the resource gets unlocked after an exception occurs
"""
my_resource = MockLockable()
try:
with mpmutils.lock_guard(my_resource):
self.assertEqual(my_resource.locked, True)
raise Exception("This is just a drill")
except Exception:
# Eat the raised exception
pass
finally:
self.assertEqual(my_resource.locked, False)
if __name__ == '__main__':
unittest.main()
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