def test_base_binding(self):
t = TestTarget()
c = ViewCollection(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
t < bind() < c
t.update_bindings()
assert t.values == (1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
def test_ViewChanged(self):
v = ViewCollection(5, 8, 2, synchronous=True)
t = self.Tester()
v.onViewChanged += t.handle_event
v.update_filter(lambda x: x < 5)
assert t.kwargs['collection'] == v
