'Check widget discrete data with missing values and no group variable'

def test_input_data_missings_disc_no_group_var(self):

    data = self.zoo
    data.domain.class_var = ContinuousVariable('cls')
    data.X[:, 1] = np.nan
    data.domain.attributes[1].values = []
    self.send_signal('Data', data)
    self.widget.controls.order_by_importance.setChecked(True)
    self._select_list_items(self.widget.controls.attribute)
    self._select_list_items(self.widget.controls.group_var)
