1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
import unittest
from unittest.mock import Mock
from IPython.core import events
import IPython.testing.tools as tt
@events._define_event
def ping_received():
pass
@events._define_event
def event_with_argument(argument):
pass
class CallbackTests(unittest.TestCase):
def setUp(self):
self.em = events.EventManager(get_ipython(),
{'ping_received': ping_received,
'event_with_argument': event_with_argument})
def test_register_unregister(self):
cb = Mock()
self.em.register('ping_received', cb)
self.em.trigger('ping_received')
self.assertEqual(cb.call_count, 1)
self.em.unregister('ping_received', cb)
self.em.trigger('ping_received')
self.assertEqual(cb.call_count, 1)
def test_bare_function_missed_unregister(self):
def cb1():
...
def cb2():
...
self.em.register("ping_received", cb1)
self.assertRaises(ValueError, self.em.unregister, "ping_received", cb2)
self.em.unregister("ping_received", cb1)
def test_cb_error(self):
cb = Mock(side_effect=ValueError)
self.em.register('ping_received', cb)
with tt.AssertPrints("Error in callback"):
self.em.trigger('ping_received')
def test_cb_keyboard_interrupt(self):
cb = Mock(side_effect=KeyboardInterrupt)
self.em.register('ping_received', cb)
with tt.AssertPrints("Error in callback"):
self.em.trigger('ping_received')
def test_unregister_during_callback(self):
invoked = [False] * 3
def func1(*_):
invoked[0] = True
self.em.unregister('ping_received', func1)
self.em.register('ping_received', func3)
def func2(*_):
invoked[1] = True
self.em.unregister('ping_received', func2)
def func3(*_):
invoked[2] = True
self.em.register('ping_received', func1)
self.em.register('ping_received', func2)
self.em.trigger('ping_received')
self.assertEqual([True, True, False], invoked)
self.assertEqual([func3], self.em.callbacks['ping_received'])
|
