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[3.11] GH-94808: Cover handling non-finite numbers from round when ndigits is provided (GH-94860) #94882

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Jul 15, 2022
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[3.11] GH-94808: Cover handling non-finite numbers from round when ndigits is provided (GH-94860) #94882

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5 changes: 5 additions & 0 deletions Lib/test/test_float.py
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Original file line number Diff line number Diff line change
Expand Up @@ -832,6 +832,11 @@ def test_inf_nan(self):
self.assertRaises(TypeError, round, NAN, "ceci n'est pas un integer")
self.assertRaises(TypeError, round, -0.0, 1j)

def test_inf_nan_ndigits(self):
self.assertEqual(round(INF, 0), INF)
self.assertEqual(round(-INF, 0), -INF)
self.assertTrue(math.isnan(round(NAN, 0)))

def test_large_n(self):
for n in [324, 325, 400, 2**31-1, 2**31, 2**32, 2**100]:
self.assertEqual(round(123.456, n), 123.456)
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