def test_write_lock_while_read_locked(self):
real_lock = DummyLock()
l = CountedLock(real_lock)
l.lock_read()
self.assertRaises(ReadOnlyError, l.lock_write)
self.assertRaises(ReadOnlyError, l.lock_write)
l.unlock()
self.assertFalse(l.is_locked())
self.assertEquals(['lock_read', 'unlock'], real_lock._calls)
def test_read_lock_while_write_locked(self):
real_lock = DummyLock()
l = CountedLock(real_lock)
l.lock_write()
l.lock_read()
l.lock_write()
l.unlock()
l.unlock()
l.unlock()
self.assertFalse(l.is_locked())
self.assertEquals(['lock_write', 'unlock'], real_lock._calls)
def test_write_lock_while_read_locked(self):
real_lock = DummyLock()
l = CountedLock(real_lock)
l.lock_read()
self.assertRaises(ReadOnlyError, l.lock_write)
self.assertRaises(ReadOnlyError, l.lock_write)
l.unlock()
self.assertFalse(l.is_locked())
self.assertEquals(
['lock_read', 'unlock'],
real_lock._calls)
def test_read_lock_while_write_locked(self):
real_lock = DummyLock()
l = CountedLock(real_lock)
l.lock_write()
l.lock_read()
self.assertEquals('token', l.lock_write())
l.unlock()
l.unlock()
l.unlock()
self.assertFalse(l.is_locked())
self.assertEquals(
['lock_write', 'unlock'],
real_lock._calls)
def test_lock_unlock(self):
# Lock and unlock a counted lock
real_lock = DummyLock()
l = CountedLock(real_lock)
self.assertFalse(l.is_locked())
# can lock twice, although this isn't allowed on the underlying lock
l.lock_read()
l.lock_read()
self.assertTrue(l.is_locked())
# and release
l.unlock()
self.assertTrue(l.is_locked())
l.unlock()
self.assertFalse(l.is_locked())
self.assertEquals(['lock_read', 'unlock'], real_lock._calls)
def test_read_lock(self):
# Lock and unlock a counted lock
real_lock = DummyLock()
l = CountedLock(real_lock)
self.assertFalse(l.is_locked())
# can lock twice, although this isn't allowed on the underlying lock
l.lock_read()
l.lock_read()
self.assertTrue(l.is_locked())
# and release
l.unlock()
self.assertTrue(l.is_locked())
l.unlock()
self.assertFalse(l.is_locked())
self.assertEquals(
['lock_read', 'unlock'],
real_lock._calls)
