def testPropertyChange(self):
layer = PropertyLayer()
stack = PropertyStack()
stack.addLayer(0, layer)
mock = Mock()
stack.wire(mock.method)
layer["testkey"] = "testvalue"
mock.method.assert_called_once_with("testkey", "testvalue")
def testDeletionEvent(self):
ps = PropertyStack()
pm = PropertyLayer(testkey="testvalue")
ps.addLayer(0, pm)
mock = Mock()
ps.wire(mock.method)
del ps["testkey"]
mock.method.assert_called_once_with({"testkey": PropertyDeleted})
def testChangeEventWhenKeyDeleted(self):
ps = PropertyStack()
low_pm = PropertyLayer(testkey="lowvalue")
high_pm = PropertyLayer(testkey="highvalue")
ps.addLayer(0, high_pm)
ps.addLayer(1, low_pm)
mock = Mock()
ps.wire(mock.method)
del high_pm["testkey"]
mock.method.assert_called_once_with({"testkey": "lowvalue"})
def testDeletionWithSecondLayer(self):
ps = PropertyStack()
low_pm = PropertyLayer(testkey="testvalue")
high_pm = PropertyLayer()
ps.addLayer(0, high_pm)
ps.addLayer(1, low_pm)
mock = Mock()
ps.wire(mock.method)
del low_pm["testkey"]
mock.method.assert_called_once_with({"testkey": PropertyDeleted})
def testUnwiresEventsOnRemoval(self):
layer = PropertyLayer()
layer["testkey"] = "before"
stack = PropertyStack()
stack.addLayer(0, layer)
mock = Mock()
stack.wire(mock.method)
stack.removeLayer(layer)
mock.method.assert_called_once_with("testkey", None)
mock.reset_mock()
layer["testkey"] = "after"
mock.method.assert_not_called()
def testPropertyChangeEventPriority(self):
low_layer = PropertyLayer()
high_layer = PropertyLayer()
low_layer["testkey"] = "initial low value"
high_layer["testkey"] = "initial high value"
stack = PropertyStack()
stack.addLayer(1, low_layer)
stack.addLayer(0, high_layer)
mock = Mock()
stack.wire(mock.method)
low_layer["testkey"] = "modified low value"
mock.method.assert_not_called()
high_layer["testkey"] = "modified high value"
mock.method.assert_called_once_with("testkey", "modified high value")
def testReplaceLayerNoEventWhenValueUnchanged(self):
fixed = PropertyLayer()
fixed["testkey"] = "fixed value"
first_layer = PropertyLayer()
first_layer["testkey"] = "same value"
second_layer = PropertyLayer()
second_layer["testkey"] = "same value"
stack = PropertyStack()
stack.addLayer(1, fixed)
stack.addLayer(0, first_layer)
mock = Mock()
stack.wire(mock.method)
mock.method.assert_not_called()
stack.replaceLayer(0, second_layer)
mock.method.assert_not_called()