'Send data with one column with all values set to NaN.
ValueError should not be thrown (Invalid number of variable columns)
That column is now suppose to be removed in a table array and
in a domain as well.
GH-2057'

def test_data_column_nans(self):

    table = datasets.data_one_column_nans()
    self.widget.controls.merge_kmeans.setChecked(True)
    self.send_signal(self.widget.Inputs.data, table)
