'Silhouette Plot now sets axis range properly.
GH-2377'

def test_bad_data_range(self):

    nan = np.NaN
    table = Table(Domain([ContinuousVariable('a'), ContinuousVariable('b'), ContinuousVariable('c')], [DiscreteVariable('d', values=['y', 'n'])]), list(zip([4, nan, nan], [15, nan, nan], [16, nan, nan], 'nyy')))
    self.widget.controls.add_scores.setChecked(1)
    self.send_signal(self.widget.Inputs.data, table)
