def test_bar(self):

        ev = EconVisualizer(self.income, self.countries)
        ev._box(self.merged_df, visualize=False)

        ev = EconVisualizer()
        ev._box(self.merged_df, visualize=False)

        with self.assertRaises(TypeError):
            ev._box(10, visualize=False)
        with self.assertRaises(KeyError):
            ev._box(df=self.countries, visualize=False)