def test_garbage_collection_3(self):
test = NotifyTestObject()
variable = Variable()
condition1 = variable.is_true()
condition2 = ~condition1
condition2.store(test.simple_handler)
condition1 = weakref.ref(condition1)
condition2 = weakref.ref(condition2)
self.collect_garbage()
self.assertNotEqual(condition1(), None)
self.assertNotEqual(condition2(), None)
self.collect_garbage()
variable.value = 10
condition2().changed.disconnect(test.simple_handler)
self.collect_garbage()
self.assertEqual(condition1(), None)
self.assertEqual(condition2(), None)
variable = weakref.ref(variable)
self.collect_garbage()
self.assertEqual(variable(), None)
test.assert_results(True, False)
def test_synchronizing_1(self):
test = NotifyTestObject()
variable1 = Variable()
variable2 = Variable()
variable1.value = 100
variable2.value = 200
variable1.changed.connect(test.simple_handler)
with variable1.synchronizing(variable2):
variable2.value = 300
variable2.value = 400
test.assert_results(200, 300)
def test_synchronizing_2(self):
test = NotifyTestObject()
variable1 = Variable()
variable2 = Variable()
variable1.value = 100
variable2.value = 200
variable1.changed.connect(test.simple_handler)
with nested(ignoring_exceptions(), variable1.synchronizing(variable2)):
variable2.value = 300
raise Exception
variable2.value = 400
test.assert_results(200, 300)
def test_with_changes_frozen_1(self):
test = NotifyTestObject()
variable = Variable()
variable.changed.connect(test.simple_handler)
variable.with_changes_frozen(lambda: None)
# Must not emit `changed' signal: no changes at all.
test.assert_results()
def test_changes_frozen_2(self):
test = NotifyTestObject()
variable = Variable()
variable.changed.connect(test.simple_handler)
with variable.changes_frozen():
variable.value = 1
test.assert_results(1)
def test_storing_1(self):
test = NotifyTestObject()
variable = Variable()
variable.value = 100
with variable.storing(test.simple_handler):
variable.value = 200
variable.value = 300
test.assert_results(100, 200)
def test_changes_frozen_4(self):
test = NotifyTestObject()
variable = Variable()
variable.changed.connect(test.simple_handler)
with variable.changes_frozen():
variable.value = 1
variable.value = None
# Must not emit: value returned to original.
test.assert_results()
def test_with_changes_frozen_3(self):
test = NotifyTestObject()
variable = Variable()
variable.changed.connect(test.simple_handler)
def do_changes():
variable.value = 1
variable.value = 2
variable.with_changes_frozen(do_changes)
test.assert_results(2)
def test_storing_2(self):
test = NotifyTestObject()
variable = Variable()
variable.value = 100
with nested(ignoring_exceptions(),
variable.storing(test.simple_handler)):
variable.value = 200
raise Exception
variable.value = 300
test.assert_results(100, 200)
def test_with_changes_frozen_7(self):
test = NotifyTestObject()
variable = Variable()
variable.changed.connect(test.simple_handler)
def do_changes_1():
def do_changes_2():
variable.value = 1
variable.with_changes_frozen(do_changes_2)
variable.value = None
variable.with_changes_frozen(do_changes_1)
# Must not emit: value returned to original.
test.assert_results()
def test_garbage_collection_1(self):
test = NotifyTestObject()
variable = Variable()
condition = variable.is_true()
condition.store(test.simple_handler)
condition = weakref.ref(condition)
# This must not collect the `is_true' condition, even though it is not directly
# referenced at all.
self.collect_garbage()
self.assertNotEqual(condition(), None)
self.collect_garbage()
variable.value = 10
# This makes condition `unused' and it must become available to garbage collector
# again.
del variable
self.collect_garbage()
self.assertEqual(condition(), None)
test.assert_results(False, True)
