def METHOD_NAME(self):
    ec = EqualityCompare()
    ec.on_trait_change(self.bar_changed, "bar")
    self.reset_change_tracker()
    default_value = ec.bar
    ec.bar = self.a
    self.check_tracker(ec, "bar", default_value, self.a, 1)
    ec.bar = self.a
    self.check_tracker(ec, "bar", default_value, self.a, 1)