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Update test_numeric_tower.py from Cpython v3.11.2 #4843

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Merged
merged 1 commit into from
Apr 5, 2023
Merged

Update test_numeric_tower.py from Cpython v3.11.2 #4843

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30 changes: 30 additions & 0 deletions Lib/test/test_numeric_tower.py
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Original file line number Diff line number Diff line change
Expand Up @@ -14,6 +14,27 @@
_PyHASH_MODULUS = sys.hash_info.modulus
_PyHASH_INF = sys.hash_info.inf


class DummyIntegral(int):
"""Dummy Integral class to test conversion of the Rational to float."""

def __mul__(self, other):
return DummyIntegral(super().__mul__(other))
__rmul__ = __mul__

def __truediv__(self, other):
return NotImplemented
__rtruediv__ = __truediv__

@property
def numerator(self):
return DummyIntegral(self)

@property
def denominator(self):
return DummyIntegral(1)


class HashTest(unittest.TestCase):
def check_equal_hash(self, x, y):
# check both that x and y are equal and that their hashes are equal
Expand Down Expand Up @@ -113,6 +134,8 @@ def test_decimals(self):
self.check_equal_hash(D('12300.00'), D(12300))
self.check_equal_hash(D('12300.000'), D(12300))

# TODO: RUSTPYTHON
@unittest.expectedFailure
def test_fractions(self):
# check special case for fractions where either the numerator
# or the denominator is a multiple of _PyHASH_MODULUS
Expand All @@ -121,6 +144,13 @@ def test_fractions(self):
self.assertEqual(hash(F(7*_PyHASH_MODULUS, 1)), 0)
self.assertEqual(hash(F(-_PyHASH_MODULUS, 1)), 0)

# The numbers ABC doesn't enforce that the "true" division
# of integers produces a float. This tests that the
# Rational.__float__() method has required type conversions.
x = F(DummyIntegral(1), DummyIntegral(2), _normalize=False)
self.assertRaises(TypeError, lambda: x.numerator/x.denominator)
self.assertEqual(float(x), 0.5)

def test_hash_normalization(self):
# Test for a bug encountered while changing long_hash.
#
Expand Down