def test_reset_removes_any_subscribers(self):
observer = Observer()
callback = mock.Mock()
observer.subscribe(callback)
observer.reset()
observer.notify()
callback.assert_not_called()
def test_can_pass_arguments_to_objects(self):
observer = Observer()
callback = mock.Mock()
observer.subscribe(callback)
observer.notify("0000")
arg_list = callback.call_args[0]
# This is because we are using args and kwargs
expected = ("0000", )
self.assertEqual(arg_list, expected)
def test_can_notify_multiple_objects(self):
observer = Observer()
callback1 = mock.Mock()
observer.subscribe(callback1)
callback2 = mock.Mock()
observer.subscribe(callback2)
observer.notify()
callback1.assert_called()
callback2.assert_called()
class ControlButton(PyQt5.QtWidgets.QLabel):
def __init__(self, image, height, callback, parent=None):
super(ControlButton, self).__init__(parent)
self._signal = Observer()
self._signal.subscribe(callback)
pixmap = PyQt5.QtGui.QPixmap(image)
self.setPixmap(pixmap.scaledToHeight(height))
def onMouseRelease(self, _):
self._signal.notify()
class TextSetting(LineEdit):
def __init__(self, label="", parent=None):
super(TextSetting, self).__init__(label, parent)
self._signal = Observer()
def get_value(self):
return self.text()
def connect(self, function):
self._signal.subscribe(function)
def focusInEvent(self, e):
super(TextSetting, self).focusInEvent(e)
self._signal.notify(self.mapToGlobal(PyQt5.QtCore.QPoint(0, 0)).y())
def test_throws_error_if_object_expects_different_arguments_to_notify(
self):
observer = Observer()
observer.subscribe(lambda arg1, arg2: print(arg1, arg2))
self.assertRaises(ValueError, observer.notify, "0000")
def test_callback_called_by_notify(self):
observer = Observer()
callback = mock.Mock()
observer.subscribe(callback)
observer.notify()
callback.assert_called()