"""
Tests for np.foo applied to Series, not necessarily ufuncs.
"""

import numpy as np

from pandas import Series


class TestPtp:
    def test_ptp(self):
        # GH#21614
        N = 1000
        arr = np.random.randn(N)
        ser = Series(arr)
        assert np.ptp(ser) == np.ptp(arr)