def test_watch_bad_name(self):
"""should not execute a handler registered for a different property"""
self.widget.watch("bad name", self.handler)
comm = Mock(spec=Comm)
channels = Channels(comm=comm)
channels._handle_change_msg(None, self.msg, None)
self.assertEqual(self.lst, [])
def test_watch_before_channels(self):
"""should store registered handler which is executed after Channels is instantiated and a change is made"""
self.widget.watch(self.name, self.handler)
comm = Mock(spec=Comm)
channels = Channels(comm=comm)
channels._handle_change_msg(None, self.msg, None)
self.assertEqual(self.lst, [1, 2])
def test_watch(self):
"""should call watch handler when change is made"""
comm = Mock(spec=Comm)
channels = Channels(comm=comm)
self.widget.watch(self.name, self.handler)
channels._handle_change_msg(None, self.msg, None)
self.assertEqual(self.lst, [1, 2])
def test_watch_dict_before_channels(self):
"""should execute a handler given an dict type when watch is registered before Channels instantiated"""
self.widget.watch(self.name, self.handler)
self.msg['data']['old_val'] = {"a": 1}
self.msg['data']['new_val'] = {"b": "c"}
comm = Mock(spec=Comm)
channels = Channels(comm=comm)
channels._handle_change_msg(None, self.msg, None)
self.assertEqual(self.lst, [{"a": 1}, {"b": "c"}])
def test_watch_dict(self):
"""should execute a handler given an dict type"""
comm = Mock(spec=Comm)
channels = Channels(comm=comm)
self.widget.watch(self.name, self.handler)
self.msg['data']['old_val'] = {"a": 1}
self.msg['data']['new_val'] = {"b": "c"}
channels._handle_change_msg(None, self.msg, None)
self.assertEqual(self.lst, [{"a": 1}, {"b": "c"}])
def test_watch_array_before_channels(self):
"""should execute a handler given an array type when watch is registered before Channels instantiated"""
self.widget.watch(self.name, self.handler)
self.msg['data']['old_val'] = [1, 2]
self.msg['data']['new_val'] = [3, 4]
comm = Mock(spec=Comm)
channels = Channels(comm=comm)
channels._handle_change_msg(None, self.msg, None)
self.assertEqual(self.lst, [[1, 2], [3, 4]])
def test_watch_array(self):
"""should execute a handler given an array type"""
comm = Mock(spec=Comm)
channels = Channels(comm=comm)
self.widget.watch(self.name, self.handler)
self.msg['data']['old_val'] = [1, 2]
self.msg['data']['new_val'] = [3, 4]
channels._handle_change_msg(None, self.msg, None)
self.assertEqual(self.lst, [[1, 2], [3, 4]])
