'ZeroDivisonError - Weights sum to zero, can\'t be normalized
In case when all rows in a column are NaN then it throws that error.
GH-2064'

def test_data_column_nans(self):

    table = datasets.data_one_column_nans()
    saved = {'preprocessors': [('orange.preprocess.scale', {'center': Scale.CenteringType.Mean, 'scale': Scale.ScalingType.Std})]}
    model = self.widget.load(saved)
    self.widget.set_model(model)
    self.send_signal(self.widget.Inputs.data, table)
