def test_divide_series(self):
        series = self._generate_series_list()
        div = functions.divideSeries({}, [series[0]], [series[1]])[0]
        self.assertEqual(div[:3], [0, 1/3., 0.5])

        with self.assertRaises(ValueError):
            functions.divideSeries({}, [series[0]], [1, 2])
    def test_divide_series(self):
        series = self._generate_series_list()
        div = functions.divideSeries({}, [series[0]], [series[1]])[0]
        self.assertEqual(div[:3], [0, 1 / 3., 0.5])

        with self.assertRaises(ValueError):
            functions.divideSeries({}, [series[0]], [1, 2])