'Check Target class combo values'

def test_target_values(self):

    self.send_signal(self.widget.Inputs.classifier, self.nb_cls)
    for (i, text) in enumerate(self.data.domain.class_var.values):
        self.assertEqual(text, self.widget.class_combo.itemText(i))
    self.send_signal(self.widget.Inputs.classifier, None)
    self.assertEqual(0, self.widget.class_combo.count())
