def test_signal_argument_passing(self):
sig = Signal()
count = 3
def go(val):
nonlocal count
count += val
slot = sig.add(go)
sig.send(7)
self.assertEqual(count, 10)
def test_signal_sending_messages(self):
sig = Signal()
count = 0
def go():
nonlocal count
count += 1
slot = sig.add(go)
[sig.send() for i in range(3)]
self.assertEqual(count, 3)
def test_cannot_remove_slot_while_signalling(self):
class BadRemove:
def __init__(self, signal):
self.slot = signal.add(self.do_remove)
def do_remove(self):
self.slot.detach()
sig = Signal()
bad_remover = BadRemove(sig)
with self.assertRaises(SignalRunningException):
sig.send()
def test_signal_args_and_kwargs(self):
sig = Signal()
count = 11
data = 'foo'
def go(val, say='default_string'):
nonlocal count, data
count += val
data = say
slot = sig.add(go)
sig.send(3, say='bar')
self.assertEqual(count, 14)
self.assertEqual(data, 'bar')
def test_remove_function_instance_directly(self):
sig = Signal()
count = 4
def go(val):
nonlocal count
count += val
slot = sig.add(go)
sig.send(3) # count is now 7
sig.remove(go)
sig.send(6) # If count is 13, then removal failed
self.assertEqual(count, 7)
def test_slot_removal(self):
sig = Signal()
count = 3
def go(val):
nonlocal count
count += val
slot = sig.add(go)
sig.send(5) # Count is now 8
sig.remove_slot(slot)
sig.send(7) # If count is 15, then removal failed
self.assertEqual(count, 8)
def test_slot_detach(self):
sig = Signal()
count = 7
def go(val):
nonlocal count
count += val
slot = sig.add(go)
sig.send(3) # Count is now 10
slot.detach()
sig.send(7) # If count is 17, then removal failed
self.assertEqual(count, 10)
def test_add_func_to_signal_via_slot_contents(self):
sig = Signal()
def go():
x = 1 + 2 # Do nothing
slot = sig.add(go)
self.assertEqual(slot.callback, go)
