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bpo-38629: implement __floor__ and __ceil__ for float type (GH-16985)

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Batuhan Taşkaya 2019-12-16 01:00:28 +03:00 • committed by Victor Stinner
parent b08d3f71be
commit cb8b946ac1
4 changed files with 96 additions and 1 deletions
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28
Lib/test/test_float.py
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@ -312,6 +312,34 @@ class GeneralFloatCases(unittest.TestCase):
# distinguishes -0.0 and 0.0.
self.assertEqual((a, copysign(1.0, a)), (b, copysign(1.0, b)))
def test_float_floor(self):
self.assertIsInstance(float(0.5).__floor__(), int)
self.assertEqual(float(0.5).__floor__(), 0)
self.assertEqual(float(1.0).__floor__(), 1)
self.assertEqual(float(1.5).__floor__(), 1)
self.assertEqual(float(-0.5).__floor__(), -1)
self.assertEqual(float(-1.0).__floor__(), -1)
self.assertEqual(float(-1.5).__floor__(), -2)
self.assertEqual(float(1.23e167).__floor__(), 1.23e167)
self.assertEqual(float(-1.23e167).__floor__(), -1.23e167)
self.assertRaises(ValueError, float("nan").__floor__)
self.assertRaises(OverflowError, float("inf").__floor__)
self.assertRaises(OverflowError, float("-inf").__floor__)
def test_float_ceil(self):
self.assertIsInstance(float(0.5).__ceil__(), int)
self.assertEqual(float(0.5).__ceil__(), 1)
self.assertEqual(float(1.0).__ceil__(), 1)
self.assertEqual(float(1.5).__ceil__(), 2)
self.assertEqual(float(-0.5).__ceil__(), 0)
self.assertEqual(float(-1.0).__ceil__(), -1)
self.assertEqual(float(-1.5).__ceil__(), -1)
self.assertEqual(float(1.23e167).__ceil__(), 1.23e167)
self.assertEqual(float(-1.23e167).__ceil__(), -1.23e167)
self.assertRaises(ValueError, float("nan").__ceil__)
self.assertRaises(OverflowError, float("inf").__ceil__)
self.assertRaises(OverflowError, float("-inf").__ceil__)
@support.requires_IEEE_754
def test_float_mod(self):
# Check behaviour of % operator for IEEE 754 special cases.