'No crash on a column with NaN values and with selected option
normalize by span.
GH-2144'

def test_one_column_nan_values_normalize_span(self):

    table = Table('iris')
    table[:, 2] = np.NaN
    self.send_signal(self.widget.Inputs.data, table)
    self.widget.continuous_treatment = 1
    self.widget.unconditional_commit()
    table = Table('iris')
    table[(1, 2)] = np.NaN
    self.send_signal(self.widget.Inputs.data, table)
    self.widget.unconditional_commit()
