| 95 | self.assertTestIsClean(a_signal) |
| 96 | |
| 97 | def test_garbage_collected_sender(self): |
| 98 | signal = Signal() |
| 99 | |
| 100 | class Sender: |
| 101 | pass |
| 102 | |
| 103 | def make_id(target): |
| 104 | """ |
| 105 | Simulate id() reuse for distinct senders with non-overlapping |
| 106 | lifetimes that would require memory contention to reproduce. |
| 107 | """ |
| 108 | if isinstance(target, Sender): |
| 109 | return 0 |
| 110 | return _make_id(target) |
| 111 | |
| 112 | def first_receiver(attempt, **kwargs): |
| 113 | return attempt |
| 114 | |
| 115 | def second_receiver(attempt, **kwargs): |
| 116 | return attempt |
| 117 | |
| 118 | with mock.patch("django.dispatch.dispatcher._make_id", make_id): |
| 119 | sender = Sender() |
| 120 | signal.connect(first_receiver, sender) |
| 121 | result = signal.send(sender, attempt="first") |
| 122 | self.assertEqual(result, [(first_receiver, "first")]) |
| 123 | |
| 124 | del sender |
| 125 | garbage_collect() |
| 126 | |
| 127 | sender = Sender() |
| 128 | signal.connect(second_receiver, sender) |
| 129 | result = signal.send(sender, attempt="second") |
| 130 | self.assertEqual(result, [(second_receiver, "second")]) |
| 131 | |
| 132 | def test_cached_garbaged_collected(self): |
| 133 | """ |