def test_event_changed(self):
event = EventSystem(marker)
changed_values = []
def changed(owner, variable, old_value, new_value, fromdb):
changed_values.append((owner, variable,
old_value, new_value, fromdb))
event.hook("changed", changed)
variable = CustomVariable(event=event)
variable.set("value1")
variable.set("value2")
variable.set("value3", from_db=True)
variable.set(None, from_db=True)
variable.set("value4")
variable.delete()
variable.delete()
self.assertEquals(changed_values[0],
(marker, variable, Undef, "value1", False))
self.assertEquals(changed_values[1],
(marker, variable, ("g", ("s", "value1")), "value2", False))
self.assertEquals(changed_values[2],
(marker, variable, ("g", ("s", "value2")), ("g", ("s", "value3")),
True))
self.assertEquals(changed_values[3],
(marker, variable, ("g", ("s", "value3")), None, True))
self.assertEquals(changed_values[4],
(marker, variable, None, "value4", False))
self.assertEquals(changed_values[5],
(marker, variable, ("g", ("s", "value4")), Undef, False))
self.assertEquals(len(changed_values), 6)
def test_execute_sends_event(self):
event = EventSystem(marker)
calls = []
def register_transaction(owner):
calls.append(owner)
event.hook("register-transaction", register_transaction)
connection = self.database.connect(event)
connection.execute("SELECT 1")
self.assertEqual(len(calls), 1)
self.assertEqual(calls[0], marker)
def test_lazy_value_setting_on_resolving(self):
event = EventSystem(marker)
def resolve(owner, variable, value):
variable.set(marker)
event.hook("resolve-lazy-value", resolve)
lazy_value = LazyValue()
variable = CustomVariable(lazy_value, event=event)
self.assertEquals(variable.get(), ("g", ("s", marker)))
def test_lazy_value_reset_after_changed(self):
event = EventSystem(marker)
resolve_called = []
def resolve(owner, variable, value):
resolve_called.append(True)
event.hook("resolve-lazy-value", resolve)
variable = CustomVariable(event=event)
variable.set(LazyValue())
variable.set(1)
self.assertEquals(variable.get(), ("g", ("s", 1)))
self.assertEquals(resolve_called, [])
def test_lazy_value_changed_event(self):
event = EventSystem(marker)
changed_values = []
def changed(owner, variable, old_value, new_value, fromdb):
changed_values.append((owner, variable,
old_value, new_value, fromdb))
event.hook("changed", changed)
variable = CustomVariable(event=event)
lazy_value = LazyValue()
variable.set(lazy_value)
self.assertEquals(changed_values,
[(marker, variable, Undef, lazy_value, False)])
def test_lazy_value_resolving(self):
event = EventSystem(marker)
resolve_values = []
def resolve(owner, variable, value):
resolve_values.append((owner, variable, value))
lazy_value = LazyValue()
variable = CustomVariable(lazy_value, event=event)
event.hook("resolve-lazy-value", resolve)
variable.get()
self.assertEquals(resolve_values,
[(marker, variable, lazy_value)])
def test_weak_reference(self):
marker = Marker()
called = []
def callback(owner):
called.append(owner)
self.event = EventSystem(marker)
self.event.hook("event", callback)
self.event.emit("event")
self.assertEquals(called, [marker])
del called[:]
del marker
self.event.emit("event")
self.assertEquals(called, [])
def setUp(self):
TestHelper.setUp(self)
self.event = EventSystem(marker)
class EventTest(TestHelper):
def setUp(self):
TestHelper.setUp(self)
self.event = EventSystem(marker)
def test_hook_unhook_emit(self):
called1 = []
called2 = []
def callback1(owner, arg1, arg2):
called1.append((owner, arg1, arg2))
def callback2(owner, arg1, arg2, data1, data2):
called2.append((owner, arg1, arg2, data1, data2))
self.event.hook("one", callback1)
self.event.hook("one", callback1)
self.event.hook("one", callback2, 10, 20)
self.event.hook("two", callback2, 10, 20)
self.event.hook("two", callback2, 10, 20)
self.event.hook("two", callback2, 30, 40)
self.event.hook("three", callback1)
self.event.emit("one", 1, 2)
self.event.emit("two", 3, 4)
self.event.unhook("two", callback2, 10, 20)
self.event.emit("two", 3, 4)
self.event.emit("three", 5, 6)
self.assertEquals(sorted(called1), [
(marker, 1, 2),
(marker, 5, 6),
])
self.assertEquals(sorted(called2), [
(marker, 1, 2, 10, 20),
(marker, 3, 4, 10, 20),
(marker, 3, 4, 30, 40),
(marker, 3, 4, 30, 40),
])
def test_unhook_by_returning_false(self):
called = []
def callback(owner):
called.append(owner)
return len(called) < 2
self.event.hook("event", callback)
self.event.emit("event")
self.event.emit("event")
self.event.emit("event")
self.event.emit("event")
self.assertEquals(called, [marker, marker])
def test_weak_reference(self):
marker = Marker()
called = []
def callback(owner):
called.append(owner)
self.event = EventSystem(marker)
self.event.hook("event", callback)
self.event.emit("event")
self.assertEquals(called, [marker])
del called[:]
del marker
self.event.emit("event")
self.assertEquals(called, [])
def test_list_events(self):
event = EventSystem(marker)
variable = ListVariable(RawStrVariable, event=event,
value_factory=list)
changes = []
def changed(owner, variable, old_value, new_value, fromdb):
changes.append((variable, old_value, new_value, fromdb))
event.emit("start-tracking-changes", event)
event.hook("changed", changed)
variable.checkpoint()
event.emit("flush")
self.assertEquals(changes, [])
lst = variable.get()
self.assertEquals(lst, [])
self.assertEquals(changes, [])
lst.append("a")
self.assertEquals(changes, [])
event.emit("flush")
self.assertEquals(changes, [(variable, None, ["a"], False)])
del changes[:]
event.emit("object-deleted")
self.assertEquals(changes, [(variable, None, ["a"], False)])
def test_list_events(self):
event = EventSystem(marker)
variable = ListVariable(BytesVariable, event=event, value_factory=list)
changes = []
def changed(owner, variable, old_value, new_value, fromdb):
changes.append((variable, old_value, new_value, fromdb))
event.emit("start-tracking-changes", event)
event.hook("changed", changed)
variable.checkpoint()
event.emit("flush")
self.assertEqual(changes, [])
lst = variable.get()
self.assertEqual(lst, [])
self.assertEqual(changes, [])
lst.append("a")
self.assertEqual(changes, [])
event.emit("flush")
self.assertEqual(changes, [(variable, None, ["a"], False)])
del changes[:]
event.emit("object-deleted")
self.assertEqual(changes, [(variable, None, ["a"], False)])
def setUp(self):
TestHelper.setUp(self)
self.event = EventSystem(marker)
class EventTest(TestHelper):
def setUp(self):
TestHelper.setUp(self)
self.event = EventSystem(marker)
def test_hook_unhook_emit(self):
called1 = []
called2 = []
def callback1(owner, arg1, arg2):
called1.append((owner, arg1, arg2))
def callback2(owner, arg1, arg2, data1, data2):
called2.append((owner, arg1, arg2, data1, data2))
self.event.hook("one", callback1)
self.event.hook("one", callback1)
self.event.hook("one", callback2, 10, 20)
self.event.hook("two", callback2, 10, 20)
self.event.hook("two", callback2, 10, 20)
self.event.hook("two", callback2, 30, 40)
self.event.hook("three", callback1)
self.event.emit("one", 1, 2)
self.event.emit("two", 3, 4)
self.event.unhook("two", callback2, 10, 20)
self.event.emit("two", 3, 4)
self.event.emit("three", 5, 6)
self.assertEquals(sorted(called1), [
(marker, 1, 2),
(marker, 5, 6),
])
self.assertEquals(sorted(called2), [
(marker, 1, 2, 10, 20),
(marker, 3, 4, 10, 20),
(marker, 3, 4, 30, 40),
(marker, 3, 4, 30, 40),
])
def test_unhook_by_returning_false(self):
called = []
def callback(owner):
called.append(owner)
return len(called) < 2
self.event.hook("event", callback)
self.event.emit("event")
self.event.emit("event")
self.event.emit("event")
self.event.emit("event")
self.assertEquals(called, [marker, marker])
def test_weak_reference(self):
marker = Marker()
called = []
def callback(owner):
called.append(owner)
self.event = EventSystem(marker)
self.event.hook("event", callback)
self.event.emit("event")
self.assertEquals(called, [marker])
del called[:]
del marker
self.event.emit("event")
self.assertEquals(called, [])
