'ValueError cannot convert float NaN to integer.
In case when all column values are NaN then it throws that error.
GH-2061'

def test_data_column_nans(self):

    table = datasets.data_one_column_nans()
    self.send_signal(self.widget.Inputs.data, table)
    cb_attr_color = self.widget.controls.graph.attr_color
    simulate.combobox_activate_item(cb_attr_color, 'b')
    simulate.combobox_activate_item(self.widget.cb_attr_x, 'a')
    simulate.combobox_activate_item(self.widget.cb_attr_y, 'a')
    self.widget.update_graph()
