def test_acquire_and_release(self):
log = []
expected = [('acquire', 'ns', 'name', 'mode'),
('release', 'ns', 'name', 'mode')]
lock = FakeGuardedLock('ns', 'name', 'mode', log)
lock.acquire()
self.assertEqual(expected[:1], log)
lock.release()
self.assertEqual(expected, log)
def test_deadlock(self):
log = []
locks = [
FakeGuardedLock('00_storage', 'dom', 'shared', log),
# Attemting to lock next locks will deadlock in resourceManager.
FakeGuardedLock('02_img.dom', 'img', 'exclusive', log),
FakeGuardedLock('02_img.dom', 'img', 'shared', log),
FakeGuardedLock('03_vol.dom', 'vol', 'exclusive', log),
]
# Creating a context should raise
with self.assertRaises(guarded.Deadlock):
with guarded.context(locks):
pass
# Without locking any of the locks
self.assertEqual([], log)
def test_one_vol(self):
log = []
locks = [
FakeGuardedLock('01_dom', 'dom', 'mode', log),
FakeGuardedLock('02_img', 'img', 'mode', log),
FakeGuardedLock('03_vol', 'vol', 'mode', log)
]
expected = [('acquire', '01_dom', 'dom', 'mode'),
('acquire', '02_img', 'img', 'mode'),
('acquire', '03_vol', 'vol', 'mode'),
('release', '03_vol', 'vol', 'mode'),
('release', '02_img', 'img', 'mode'),
('release', '01_dom', 'dom', 'mode')]
with guarded.context(locks):
self.assertEqual(expected[:3], log)
self.assertEqual(expected, log)
def test_fail_inside_context(self):
log = []
locks = [
FakeGuardedLock('01_dom', 'dom1', 'mode', log),
FakeGuardedLock('02_img', 'img1', 'mode', log),
FakeGuardedLock('03_vol', 'vol1', 'mode', log)
]
expected = [('acquire', '01_dom', 'dom1', 'mode'),
('acquire', '02_img', 'img1', 'mode'),
('acquire', '03_vol', 'vol1', 'mode'),
('release', '03_vol', 'vol1', 'mode'),
('release', '02_img', 'img1', 'mode'),
('release', '01_dom', 'dom1', 'mode')]
with self.assertRaises(InjectedFailure):
with guarded.context(locks):
raise InjectedFailure()
self.assertEqual(expected, log)
def test_release_failure(self):
log = []
locks = [
FakeGuardedLock('01_dom', 'dom1', 'mode', log),
FakeGuardedLock('02_img', 'img1', 'mode', log),
FakeGuardedLock('03_vol',
'vol1',
'mode',
log,
release=InjectedFailure)
]
expected = [('acquire', '01_dom', 'dom1', 'mode'),
('acquire', '02_img', 'img1', 'mode'),
('acquire', '03_vol', 'vol1', 'mode'),
('release', '02_img', 'img1', 'mode'),
('release', '01_dom', 'dom1', 'mode')]
with self.assertRaises(guarded.ReleaseError):
with guarded.context(locks):
pass
self.assertEqual(expected, log)
def test_two_vols_different_domains(self):
log = []
locks = [
FakeGuardedLock('01_dom', 'dom1', 'mode', log),
FakeGuardedLock('02_img', 'img1', 'mode', log),
FakeGuardedLock('03_vol', 'vol1', 'mode', log),
FakeGuardedLock('01_dom', 'dom2', 'mode', log),
FakeGuardedLock('02_img', 'img2', 'mode', log),
FakeGuardedLock('03_vol', 'vol2', 'mode', log)
]
expected = [('acquire', '01_dom', 'dom1', 'mode'),
('acquire', '01_dom', 'dom2', 'mode'),
('acquire', '02_img', 'img1', 'mode'),
('acquire', '02_img', 'img2', 'mode'),
('acquire', '03_vol', 'vol1', 'mode'),
('acquire', '03_vol', 'vol2', 'mode'),
('release', '03_vol', 'vol2', 'mode'),
('release', '03_vol', 'vol1', 'mode'),
('release', '02_img', 'img2', 'mode'),
('release', '02_img', 'img1', 'mode'),
('release', '01_dom', 'dom2', 'mode'),
('release', '01_dom', 'dom1', 'mode')]
with guarded.context(locks):
self.assertEqual(expected[:6], log)
self.assertEqual(expected, log)
def test_acquire_and_release(self):
log = []
expected = [('acquire', 'ns', 'name', 'mode'),
('release', 'ns', 'name', 'mode')]
lock = FakeGuardedLock('ns', 'name', 'mode', log)
lock.acquire()
self.assertEqual(expected[:1], log)
lock.release()
self.assertEqual(expected, log)
def test_mode_ignored_for_sorting(self):
a = FakeGuardedLock('nsA', 'nameA', 'modeA', [])
b = FakeGuardedLock('nsA', 'nameA', 'modeB', [])
self.assertFalse(a < b)
self.assertFalse(b < a)
def test_mode_used_for_equality(self):
a = FakeGuardedLock('nsA', 'nameA', 'modeA', [])
b = FakeGuardedLock('nsA', 'nameA', 'modeB', [])
self.assertNotEqual(a, b)
def test_equality(self):
a = FakeGuardedLock('ns', 'name', 'mode', [])
b = FakeGuardedLock('ns', 'name', 'mode', [])
self.assertEqual(a, b)
def test_less_than(self, a, b):
ns_a, name_a, mode_a = a
ns_b, name_b, mode_b = b
b = FakeGuardedLock(ns_b, name_b, mode_b, [])
a = FakeGuardedLock(ns_a, name_a, mode_a, [])
self.assertLess(a, b)
def test_different_types_sortable(self):
a = FakeGuardedLock('nsA', 'name', 'mode', [])
b = OtherFakeLock('nsB', 'name', 'mode', [])
self.assertTrue(a < b)
self.assertFalse(b < a)
self.assertEqual([a, b], sorted([b, a]))
def test_different_types_not_equal(self):
a = FakeGuardedLock('ns', 'name', 'mode', [])
b = OtherFakeLock('ns', 'name', 'mode', [])
self.assertFalse(a.__eq__(b))
self.assertTrue(a.__ne__(b))
def test_properties(self):
a = FakeGuardedLock('ns', 'name', 'mode', [])
self.assertEqual('ns', a.ns)
self.assertEqual('name', a.name)
self.assertEqual('mode', a.mode)
def test_different_types_not_equal(self):
a = FakeGuardedLock('ns', 'name', 'mode', [])
b = OtherFakeLock('ns', 'name', 'mode', [])
self.assertFalse(a.__eq__(b))
self.assertTrue(a.__ne__(b))
