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TST: do not use int to negative int power in tests (GH14489) #14497

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TST: do not use int to negative int power in tests (GH14489) #14497

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23 changes: 20 additions & 3 deletions pandas/tests/indexes/test_range.py
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Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
# -*- coding: utf-8 -*-

from datetime import datetime
from itertools import combinations
import itertools
import operator

from pandas.compat import range, u, PY3
Expand Down Expand Up @@ -31,12 +31,12 @@ def create_index(self):

def test_binops(self):
ops = [operator.add, operator.sub, operator.mul, operator.floordiv,
operator.truediv, pow]
operator.truediv]
scalars = [-1, 1, 2]
idxs = [RangeIndex(0, 10, 1), RangeIndex(0, 20, 2),
RangeIndex(-10, 10, 2), RangeIndex(5, -5, -1)]
for op in ops:
for a, b in combinations(idxs, 2):
for a, b in itertools.combinations(idxs, 2):
result = op(a, b)
expected = op(Int64Index(a), Int64Index(b))
tm.assert_index_equal(result, expected)
Expand All @@ -46,6 +46,23 @@ def test_binops(self):
expected = op(Int64Index(idx), scalar)
tm.assert_index_equal(result, expected)

# pow does not support negative powers
# GH14489 int to a negative integer power raise error on np >= 1.12
op = pow

scalars2 = [1, 2]
idxs2 = [RangeIndex(0, 10, 1), RangeIndex(0, 20, 2)]

for a, b in itertools.product(idxs, idxs2):
result = op(a, b)
expected = op(Int64Index(a), Int64Index(b))
tm.assert_index_equal(result, expected)
for idx in idxs:
for scalar in scalars2:
result = op(idx, scalar)
expected = op(Int64Index(idx), scalar)
tm.assert_index_equal(result, expected)

def test_too_many_names(self):
def testit():
self.index.names = ["roger", "harold"]
Expand Down