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-rw-r--r--lib/python2.7/test/test_fractions.py605
1 files changed, 605 insertions, 0 deletions
diff --git a/lib/python2.7/test/test_fractions.py b/lib/python2.7/test/test_fractions.py
new file mode 100644
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--- /dev/null
+++ b/lib/python2.7/test/test_fractions.py
@@ -0,0 +1,605 @@
+"""Tests for Lib/fractions.py."""
+
+from decimal import Decimal
+from test.test_support import run_unittest
+import math
+import numbers
+import operator
+import fractions
+import sys
+import unittest
+from copy import copy, deepcopy
+from cPickle import dumps, loads
+F = fractions.Fraction
+gcd = fractions.gcd
+
+# decorator for skipping tests on non-IEEE 754 platforms
+requires_IEEE_754 = unittest.skipUnless(
+ float.__getformat__("double").startswith("IEEE"),
+ "test requires IEEE 754 doubles")
+
+class DummyFloat(object):
+ """Dummy float class for testing comparisons with Fractions"""
+
+ def __init__(self, value):
+ if not isinstance(value, float):
+ raise TypeError("DummyFloat can only be initialized from float")
+ self.value = value
+
+ def _richcmp(self, other, op):
+ if isinstance(other, numbers.Rational):
+ return op(F.from_float(self.value), other)
+ elif isinstance(other, DummyFloat):
+ return op(self.value, other.value)
+ else:
+ return NotImplemented
+
+ def __eq__(self, other): return self._richcmp(other, operator.eq)
+ def __le__(self, other): return self._richcmp(other, operator.le)
+ def __lt__(self, other): return self._richcmp(other, operator.lt)
+ def __ge__(self, other): return self._richcmp(other, operator.ge)
+ def __gt__(self, other): return self._richcmp(other, operator.gt)
+
+ # shouldn't be calling __float__ at all when doing comparisons
+ def __float__(self):
+ assert False, "__float__ should not be invoked for comparisons"
+
+ # same goes for subtraction
+ def __sub__(self, other):
+ assert False, "__sub__ should not be invoked for comparisons"
+ __rsub__ = __sub__
+
+ # Silence Py3k warning
+ __hash__ = None
+
+
+class DummyRational(object):
+ """Test comparison of Fraction with a naive rational implementation."""
+
+ def __init__(self, num, den):
+ g = gcd(num, den)
+ self.num = num // g
+ self.den = den // g
+
+ def __eq__(self, other):
+ if isinstance(other, fractions.Fraction):
+ return (self.num == other._numerator and
+ self.den == other._denominator)
+ else:
+ return NotImplemented
+
+ def __lt__(self, other):
+ return(self.num * other._denominator < self.den * other._numerator)
+
+ def __gt__(self, other):
+ return(self.num * other._denominator > self.den * other._numerator)
+
+ def __le__(self, other):
+ return(self.num * other._denominator <= self.den * other._numerator)
+
+ def __ge__(self, other):
+ return(self.num * other._denominator >= self.den * other._numerator)
+
+ # this class is for testing comparisons; conversion to float
+ # should never be used for a comparison, since it loses accuracy
+ def __float__(self):
+ assert False, "__float__ should not be invoked"
+
+ # Silence Py3k warning
+ __hash__ = None
+
+
+class DummyFraction(fractions.Fraction):
+ """Dummy Fraction subclass for copy and deepcopy testing."""
+
+class GcdTest(unittest.TestCase):
+
+ def testMisc(self):
+ self.assertEqual(0, gcd(0, 0))
+ self.assertEqual(1, gcd(1, 0))
+ self.assertEqual(-1, gcd(-1, 0))
+ self.assertEqual(1, gcd(0, 1))
+ self.assertEqual(-1, gcd(0, -1))
+ self.assertEqual(1, gcd(7, 1))
+ self.assertEqual(-1, gcd(7, -1))
+ self.assertEqual(1, gcd(-23, 15))
+ self.assertEqual(12, gcd(120, 84))
+ self.assertEqual(-12, gcd(84, -120))
+
+
+def _components(r):
+ return (r.numerator, r.denominator)
+
+
+class FractionTest(unittest.TestCase):
+
+ def assertTypedEquals(self, expected, actual):
+ """Asserts that both the types and values are the same."""
+ self.assertEqual(type(expected), type(actual))
+ self.assertEqual(expected, actual)
+
+ def assertRaisesMessage(self, exc_type, message,
+ callable, *args, **kwargs):
+ """Asserts that callable(*args, **kwargs) raises exc_type(message)."""
+ try:
+ callable(*args, **kwargs)
+ except exc_type, e:
+ self.assertEqual(message, str(e))
+ else:
+ self.fail("%s not raised" % exc_type.__name__)
+
+ def testInit(self):
+ self.assertEqual((0, 1), _components(F()))
+ self.assertEqual((7, 1), _components(F(7)))
+ self.assertEqual((7, 3), _components(F(F(7, 3))))
+
+ self.assertEqual((-1, 1), _components(F(-1, 1)))
+ self.assertEqual((-1, 1), _components(F(1, -1)))
+ self.assertEqual((1, 1), _components(F(-2, -2)))
+ self.assertEqual((1, 2), _components(F(5, 10)))
+ self.assertEqual((7, 15), _components(F(7, 15)))
+ self.assertEqual((10**23, 1), _components(F(10**23)))
+
+ self.assertEqual((3, 77), _components(F(F(3, 7), 11)))
+ self.assertEqual((-9, 5), _components(F(2, F(-10, 9))))
+ self.assertEqual((2486, 2485), _components(F(F(22, 7), F(355, 113))))
+
+ self.assertRaisesMessage(ZeroDivisionError, "Fraction(12, 0)",
+ F, 12, 0)
+ self.assertRaises(TypeError, F, 1.5 + 3j)
+
+ self.assertRaises(TypeError, F, "3/2", 3)
+ self.assertRaises(TypeError, F, 3, 0j)
+ self.assertRaises(TypeError, F, 3, 1j)
+
+ @requires_IEEE_754
+ def testInitFromFloat(self):
+ self.assertEqual((5, 2), _components(F(2.5)))
+ self.assertEqual((0, 1), _components(F(-0.0)))
+ self.assertEqual((3602879701896397, 36028797018963968),
+ _components(F(0.1)))
+ self.assertRaises(TypeError, F, float('nan'))
+ self.assertRaises(TypeError, F, float('inf'))
+ self.assertRaises(TypeError, F, float('-inf'))
+
+ def testInitFromDecimal(self):
+ self.assertEqual((11, 10),
+ _components(F(Decimal('1.1'))))
+ self.assertEqual((7, 200),
+ _components(F(Decimal('3.5e-2'))))
+ self.assertEqual((0, 1),
+ _components(F(Decimal('.000e20'))))
+ self.assertRaises(TypeError, F, Decimal('nan'))
+ self.assertRaises(TypeError, F, Decimal('snan'))
+ self.assertRaises(TypeError, F, Decimal('inf'))
+ self.assertRaises(TypeError, F, Decimal('-inf'))
+
+ def testFromString(self):
+ self.assertEqual((5, 1), _components(F("5")))
+ self.assertEqual((3, 2), _components(F("3/2")))
+ self.assertEqual((3, 2), _components(F(" \n +3/2")))
+ self.assertEqual((-3, 2), _components(F("-3/2 ")))
+ self.assertEqual((13, 2), _components(F(" 013/02 \n ")))
+ self.assertEqual((13, 2), _components(F(u" 013/02 \n ")))
+
+ self.assertEqual((16, 5), _components(F(" 3.2 ")))
+ self.assertEqual((-16, 5), _components(F(u" -3.2 ")))
+ self.assertEqual((-3, 1), _components(F(u" -3. ")))
+ self.assertEqual((3, 5), _components(F(u" .6 ")))
+ self.assertEqual((1, 3125), _components(F("32.e-5")))
+ self.assertEqual((1000000, 1), _components(F("1E+06")))
+ self.assertEqual((-12300, 1), _components(F("-1.23e4")))
+ self.assertEqual((0, 1), _components(F(" .0e+0\t")))
+ self.assertEqual((0, 1), _components(F("-0.000e0")))
+
+
+ self.assertRaisesMessage(
+ ZeroDivisionError, "Fraction(3, 0)",
+ F, "3/0")
+ self.assertRaisesMessage(
+ ValueError, "Invalid literal for Fraction: '3/'",
+ F, "3/")
+ self.assertRaisesMessage(
+ ValueError, "Invalid literal for Fraction: '/2'",
+ F, "/2")
+ self.assertRaisesMessage(
+ ValueError, "Invalid literal for Fraction: '3 /2'",
+ F, "3 /2")
+ self.assertRaisesMessage(
+ # Denominators don't need a sign.
+ ValueError, "Invalid literal for Fraction: '3/+2'",
+ F, "3/+2")
+ self.assertRaisesMessage(
+ # Imitate float's parsing.
+ ValueError, "Invalid literal for Fraction: '+ 3/2'",
+ F, "+ 3/2")
+ self.assertRaisesMessage(
+ # Avoid treating '.' as a regex special character.
+ ValueError, "Invalid literal for Fraction: '3a2'",
+ F, "3a2")
+ self.assertRaisesMessage(
+ # Don't accept combinations of decimals and fractions.
+ ValueError, "Invalid literal for Fraction: '3/7.2'",
+ F, "3/7.2")
+ self.assertRaisesMessage(
+ # Don't accept combinations of decimals and fractions.
+ ValueError, "Invalid literal for Fraction: '3.2/7'",
+ F, "3.2/7")
+ self.assertRaisesMessage(
+ # Allow 3. and .3, but not .
+ ValueError, "Invalid literal for Fraction: '.'",
+ F, ".")
+
+ def testImmutable(self):
+ r = F(7, 3)
+ r.__init__(2, 15)
+ self.assertEqual((7, 3), _components(r))
+
+ self.assertRaises(AttributeError, setattr, r, 'numerator', 12)
+ self.assertRaises(AttributeError, setattr, r, 'denominator', 6)
+ self.assertEqual((7, 3), _components(r))
+
+ # But if you _really_ need to:
+ r._numerator = 4
+ r._denominator = 2
+ self.assertEqual((4, 2), _components(r))
+ # Which breaks some important operations:
+ self.assertNotEqual(F(4, 2), r)
+
+ def testFromFloat(self):
+ self.assertRaises(TypeError, F.from_float, 3+4j)
+ self.assertEqual((10, 1), _components(F.from_float(10)))
+ bigint = 1234567890123456789
+ self.assertEqual((bigint, 1), _components(F.from_float(bigint)))
+ self.assertEqual((0, 1), _components(F.from_float(-0.0)))
+ self.assertEqual((10, 1), _components(F.from_float(10.0)))
+ self.assertEqual((-5, 2), _components(F.from_float(-2.5)))
+ self.assertEqual((99999999999999991611392, 1),
+ _components(F.from_float(1e23)))
+ self.assertEqual(float(10**23), float(F.from_float(1e23)))
+ self.assertEqual((3602879701896397, 1125899906842624),
+ _components(F.from_float(3.2)))
+ self.assertEqual(3.2, float(F.from_float(3.2)))
+
+ inf = 1e1000
+ nan = inf - inf
+ self.assertRaisesMessage(
+ TypeError, "Cannot convert inf to Fraction.",
+ F.from_float, inf)
+ self.assertRaisesMessage(
+ TypeError, "Cannot convert -inf to Fraction.",
+ F.from_float, -inf)
+ self.assertRaisesMessage(
+ TypeError, "Cannot convert nan to Fraction.",
+ F.from_float, nan)
+
+ def testFromDecimal(self):
+ self.assertRaises(TypeError, F.from_decimal, 3+4j)
+ self.assertEqual(F(10, 1), F.from_decimal(10))
+ self.assertEqual(F(0), F.from_decimal(Decimal("-0")))
+ self.assertEqual(F(5, 10), F.from_decimal(Decimal("0.5")))
+ self.assertEqual(F(5, 1000), F.from_decimal(Decimal("5e-3")))
+ self.assertEqual(F(5000), F.from_decimal(Decimal("5e3")))
+ self.assertEqual(1 - F(1, 10**30),
+ F.from_decimal(Decimal("0." + "9" * 30)))
+
+ self.assertRaisesMessage(
+ TypeError, "Cannot convert Infinity to Fraction.",
+ F.from_decimal, Decimal("inf"))
+ self.assertRaisesMessage(
+ TypeError, "Cannot convert -Infinity to Fraction.",
+ F.from_decimal, Decimal("-inf"))
+ self.assertRaisesMessage(
+ TypeError, "Cannot convert NaN to Fraction.",
+ F.from_decimal, Decimal("nan"))
+ self.assertRaisesMessage(
+ TypeError, "Cannot convert sNaN to Fraction.",
+ F.from_decimal, Decimal("snan"))
+
+ def testLimitDenominator(self):
+ rpi = F('3.1415926535897932')
+ self.assertEqual(rpi.limit_denominator(10000), F(355, 113))
+ self.assertEqual(-rpi.limit_denominator(10000), F(-355, 113))
+ self.assertEqual(rpi.limit_denominator(113), F(355, 113))
+ self.assertEqual(rpi.limit_denominator(112), F(333, 106))
+ self.assertEqual(F(201, 200).limit_denominator(100), F(1))
+ self.assertEqual(F(201, 200).limit_denominator(101), F(102, 101))
+ self.assertEqual(F(0).limit_denominator(10000), F(0))
+ for i in (0, -1):
+ self.assertRaisesMessage(
+ ValueError, "max_denominator should be at least 1",
+ F(1).limit_denominator, i)
+
+ def testConversions(self):
+ self.assertTypedEquals(-1, math.trunc(F(-11, 10)))
+ self.assertTypedEquals(-1, int(F(-11, 10)))
+ self.assertTypedEquals(1, math.trunc(F(11, 10)))
+ self.assertEqual(False, bool(F(0, 1)))
+ self.assertEqual(True, bool(F(3, 2)))
+ self.assertTypedEquals(0.1, float(F(1, 10)))
+
+ # Check that __float__ isn't implemented by converting the
+ # numerator and denominator to float before dividing.
+ self.assertRaises(OverflowError, float, long('2'*400+'7'))
+ self.assertAlmostEqual(2.0/3,
+ float(F(long('2'*400+'7'), long('3'*400+'1'))))
+
+ self.assertTypedEquals(0.1+0j, complex(F(1,10)))
+
+
+ def testArithmetic(self):
+ self.assertEqual(F(1, 2), F(1, 10) + F(2, 5))
+ self.assertEqual(F(-3, 10), F(1, 10) - F(2, 5))
+ self.assertEqual(F(1, 25), F(1, 10) * F(2, 5))
+ self.assertEqual(F(1, 4), F(1, 10) / F(2, 5))
+ self.assertTypedEquals(2, F(9, 10) // F(2, 5))
+ self.assertTypedEquals(10**23, F(10**23, 1) // F(1))
+ self.assertEqual(F(2, 3), F(-7, 3) % F(3, 2))
+ self.assertEqual(F(8, 27), F(2, 3) ** F(3))
+ self.assertEqual(F(27, 8), F(2, 3) ** F(-3))
+ self.assertTypedEquals(2.0, F(4) ** F(1, 2))
+ self.assertEqual(F(1, 1), +F(1, 1))
+ # Will return 1j in 3.0:
+ self.assertRaises(ValueError, pow, F(-1), F(1, 2))
+
+ def testMixedArithmetic(self):
+ self.assertTypedEquals(F(11, 10), F(1, 10) + 1)
+ self.assertTypedEquals(1.1, F(1, 10) + 1.0)
+ self.assertTypedEquals(1.1 + 0j, F(1, 10) + (1.0 + 0j))
+ self.assertTypedEquals(F(11, 10), 1 + F(1, 10))
+ self.assertTypedEquals(1.1, 1.0 + F(1, 10))
+ self.assertTypedEquals(1.1 + 0j, (1.0 + 0j) + F(1, 10))
+
+ self.assertTypedEquals(F(-9, 10), F(1, 10) - 1)
+ self.assertTypedEquals(-0.9, F(1, 10) - 1.0)
+ self.assertTypedEquals(-0.9 + 0j, F(1, 10) - (1.0 + 0j))
+ self.assertTypedEquals(F(9, 10), 1 - F(1, 10))
+ self.assertTypedEquals(0.9, 1.0 - F(1, 10))
+ self.assertTypedEquals(0.9 + 0j, (1.0 + 0j) - F(1, 10))
+
+ self.assertTypedEquals(F(1, 10), F(1, 10) * 1)
+ self.assertTypedEquals(0.1, F(1, 10) * 1.0)
+ self.assertTypedEquals(0.1 + 0j, F(1, 10) * (1.0 + 0j))
+ self.assertTypedEquals(F(1, 10), 1 * F(1, 10))
+ self.assertTypedEquals(0.1, 1.0 * F(1, 10))
+ self.assertTypedEquals(0.1 + 0j, (1.0 + 0j) * F(1, 10))
+
+ self.assertTypedEquals(F(1, 10), F(1, 10) / 1)
+ self.assertTypedEquals(0.1, F(1, 10) / 1.0)
+ self.assertTypedEquals(0.1 + 0j, F(1, 10) / (1.0 + 0j))
+ self.assertTypedEquals(F(10, 1), 1 / F(1, 10))
+ self.assertTypedEquals(10.0, 1.0 / F(1, 10))
+ self.assertTypedEquals(10.0 + 0j, (1.0 + 0j) / F(1, 10))
+
+ self.assertTypedEquals(0, F(1, 10) // 1)
+ self.assertTypedEquals(0.0, F(1, 10) // 1.0)
+ self.assertTypedEquals(10, 1 // F(1, 10))
+ self.assertTypedEquals(10**23, 10**22 // F(1, 10))
+ self.assertTypedEquals(10.0, 1.0 // F(1, 10))
+
+ self.assertTypedEquals(F(1, 10), F(1, 10) % 1)
+ self.assertTypedEquals(0.1, F(1, 10) % 1.0)
+ self.assertTypedEquals(F(0, 1), 1 % F(1, 10))
+ self.assertTypedEquals(0.0, 1.0 % F(1, 10))
+
+ # No need for divmod since we don't override it.
+
+ # ** has more interesting conversion rules.
+ self.assertTypedEquals(F(100, 1), F(1, 10) ** -2)
+ self.assertTypedEquals(F(100, 1), F(10, 1) ** 2)
+ self.assertTypedEquals(0.1, F(1, 10) ** 1.0)
+ self.assertTypedEquals(0.1 + 0j, F(1, 10) ** (1.0 + 0j))
+ self.assertTypedEquals(4 , 2 ** F(2, 1))
+ # Will return 1j in 3.0:
+ self.assertRaises(ValueError, pow, (-1), F(1, 2))
+ self.assertTypedEquals(F(1, 4) , 2 ** F(-2, 1))
+ self.assertTypedEquals(2.0 , 4 ** F(1, 2))
+ self.assertTypedEquals(0.25, 2.0 ** F(-2, 1))
+ self.assertTypedEquals(1.0 + 0j, (1.0 + 0j) ** F(1, 10))
+
+ def testMixingWithDecimal(self):
+ # Decimal refuses mixed comparisons.
+ self.assertRaisesMessage(
+ TypeError,
+ "unsupported operand type(s) for +: 'Fraction' and 'Decimal'",
+ operator.add, F(3,11), Decimal('3.1415926'))
+ self.assertRaisesMessage(
+ TypeError,
+ "unsupported operand type(s) for +: 'Decimal' and 'Fraction'",
+ operator.add, Decimal('3.1415926'), F(3,11))
+ self.assertNotEqual(F(5, 2), Decimal('2.5'))
+
+ def testComparisons(self):
+ self.assertTrue(F(1, 2) < F(2, 3))
+ self.assertFalse(F(1, 2) < F(1, 2))
+ self.assertTrue(F(1, 2) <= F(2, 3))
+ self.assertTrue(F(1, 2) <= F(1, 2))
+ self.assertFalse(F(2, 3) <= F(1, 2))
+ self.assertTrue(F(1, 2) == F(1, 2))
+ self.assertFalse(F(1, 2) == F(1, 3))
+ self.assertFalse(F(1, 2) != F(1, 2))
+ self.assertTrue(F(1, 2) != F(1, 3))
+
+ def testComparisonsDummyRational(self):
+ self.assertTrue(F(1, 2) == DummyRational(1, 2))
+ self.assertTrue(DummyRational(1, 2) == F(1, 2))
+ self.assertFalse(F(1, 2) == DummyRational(3, 4))
+ self.assertFalse(DummyRational(3, 4) == F(1, 2))
+
+ self.assertTrue(F(1, 2) < DummyRational(3, 4))
+ self.assertFalse(F(1, 2) < DummyRational(1, 2))
+ self.assertFalse(F(1, 2) < DummyRational(1, 7))
+ self.assertFalse(F(1, 2) > DummyRational(3, 4))
+ self.assertFalse(F(1, 2) > DummyRational(1, 2))
+ self.assertTrue(F(1, 2) > DummyRational(1, 7))
+ self.assertTrue(F(1, 2) <= DummyRational(3, 4))
+ self.assertTrue(F(1, 2) <= DummyRational(1, 2))
+ self.assertFalse(F(1, 2) <= DummyRational(1, 7))
+ self.assertFalse(F(1, 2) >= DummyRational(3, 4))
+ self.assertTrue(F(1, 2) >= DummyRational(1, 2))
+ self.assertTrue(F(1, 2) >= DummyRational(1, 7))
+
+ self.assertTrue(DummyRational(1, 2) < F(3, 4))
+ self.assertFalse(DummyRational(1, 2) < F(1, 2))
+ self.assertFalse(DummyRational(1, 2) < F(1, 7))
+ self.assertFalse(DummyRational(1, 2) > F(3, 4))
+ self.assertFalse(DummyRational(1, 2) > F(1, 2))
+ self.assertTrue(DummyRational(1, 2) > F(1, 7))
+ self.assertTrue(DummyRational(1, 2) <= F(3, 4))
+ self.assertTrue(DummyRational(1, 2) <= F(1, 2))
+ self.assertFalse(DummyRational(1, 2) <= F(1, 7))
+ self.assertFalse(DummyRational(1, 2) >= F(3, 4))
+ self.assertTrue(DummyRational(1, 2) >= F(1, 2))
+ self.assertTrue(DummyRational(1, 2) >= F(1, 7))
+
+ def testComparisonsDummyFloat(self):
+ x = DummyFloat(1./3.)
+ y = F(1, 3)
+ self.assertTrue(x != y)
+ self.assertTrue(x < y or x > y)
+ self.assertFalse(x == y)
+ self.assertFalse(x <= y and x >= y)
+ self.assertTrue(y != x)
+ self.assertTrue(y < x or y > x)
+ self.assertFalse(y == x)
+ self.assertFalse(y <= x and y >= x)
+
+ def testMixedLess(self):
+ self.assertTrue(2 < F(5, 2))
+ self.assertFalse(2 < F(4, 2))
+ self.assertTrue(F(5, 2) < 3)
+ self.assertFalse(F(4, 2) < 2)
+
+ self.assertTrue(F(1, 2) < 0.6)
+ self.assertFalse(F(1, 2) < 0.4)
+ self.assertTrue(0.4 < F(1, 2))
+ self.assertFalse(0.5 < F(1, 2))
+
+ self.assertFalse(float('inf') < F(1, 2))
+ self.assertTrue(float('-inf') < F(0, 10))
+ self.assertFalse(float('nan') < F(-3, 7))
+ self.assertTrue(F(1, 2) < float('inf'))
+ self.assertFalse(F(17, 12) < float('-inf'))
+ self.assertFalse(F(144, -89) < float('nan'))
+
+ def testMixedLessEqual(self):
+ self.assertTrue(0.5 <= F(1, 2))
+ self.assertFalse(0.6 <= F(1, 2))
+ self.assertTrue(F(1, 2) <= 0.5)
+ self.assertFalse(F(1, 2) <= 0.4)
+ self.assertTrue(2 <= F(4, 2))
+ self.assertFalse(2 <= F(3, 2))
+ self.assertTrue(F(4, 2) <= 2)
+ self.assertFalse(F(5, 2) <= 2)
+
+ self.assertFalse(float('inf') <= F(1, 2))
+ self.assertTrue(float('-inf') <= F(0, 10))
+ self.assertFalse(float('nan') <= F(-3, 7))
+ self.assertTrue(F(1, 2) <= float('inf'))
+ self.assertFalse(F(17, 12) <= float('-inf'))
+ self.assertFalse(F(144, -89) <= float('nan'))
+
+ def testBigFloatComparisons(self):
+ # Because 10**23 can't be represented exactly as a float:
+ self.assertFalse(F(10**23) == float(10**23))
+ # The first test demonstrates why these are important.
+ self.assertFalse(1e23 < float(F(math.trunc(1e23) + 1)))
+ self.assertTrue(1e23 < F(math.trunc(1e23) + 1))
+ self.assertFalse(1e23 <= F(math.trunc(1e23) - 1))
+ self.assertTrue(1e23 > F(math.trunc(1e23) - 1))
+ self.assertFalse(1e23 >= F(math.trunc(1e23) + 1))
+
+ def testBigComplexComparisons(self):
+ self.assertFalse(F(10**23) == complex(10**23))
+ self.assertRaises(TypeError, operator.gt, F(10**23), complex(10**23))
+ self.assertRaises(TypeError, operator.le, F(10**23), complex(10**23))
+
+ x = F(3, 8)
+ z = complex(0.375, 0.0)
+ w = complex(0.375, 0.2)
+ self.assertTrue(x == z)
+ self.assertFalse(x != z)
+ self.assertFalse(x == w)
+ self.assertTrue(x != w)
+ for op in operator.lt, operator.le, operator.gt, operator.ge:
+ self.assertRaises(TypeError, op, x, z)
+ self.assertRaises(TypeError, op, z, x)
+ self.assertRaises(TypeError, op, x, w)
+ self.assertRaises(TypeError, op, w, x)
+
+ def testMixedEqual(self):
+ self.assertTrue(0.5 == F(1, 2))
+ self.assertFalse(0.6 == F(1, 2))
+ self.assertTrue(F(1, 2) == 0.5)
+ self.assertFalse(F(1, 2) == 0.4)
+ self.assertTrue(2 == F(4, 2))
+ self.assertFalse(2 == F(3, 2))
+ self.assertTrue(F(4, 2) == 2)
+ self.assertFalse(F(5, 2) == 2)
+ self.assertFalse(F(5, 2) == float('nan'))
+ self.assertFalse(float('nan') == F(3, 7))
+ self.assertFalse(F(5, 2) == float('inf'))
+ self.assertFalse(float('-inf') == F(2, 5))
+
+ def testStringification(self):
+ self.assertEqual("Fraction(7, 3)", repr(F(7, 3)))
+ self.assertEqual("Fraction(6283185307, 2000000000)",
+ repr(F('3.1415926535')))
+ self.assertEqual("Fraction(-1, 100000000000000000000)",
+ repr(F(1, -10**20)))
+ self.assertEqual("7/3", str(F(7, 3)))
+ self.assertEqual("7", str(F(7, 1)))
+
+ def testHash(self):
+ self.assertEqual(hash(2.5), hash(F(5, 2)))
+ self.assertEqual(hash(10**50), hash(F(10**50)))
+ self.assertNotEqual(hash(float(10**23)), hash(F(10**23)))
+
+ def testApproximatePi(self):
+ # Algorithm borrowed from
+ # http://docs.python.org/lib/decimal-recipes.html
+ three = F(3)
+ lasts, t, s, n, na, d, da = 0, three, 3, 1, 0, 0, 24
+ while abs(s - lasts) > F(1, 10**9):
+ lasts = s
+ n, na = n+na, na+8
+ d, da = d+da, da+32
+ t = (t * n) / d
+ s += t
+ self.assertAlmostEqual(math.pi, s)
+
+ def testApproximateCos1(self):
+ # Algorithm borrowed from
+ # http://docs.python.org/lib/decimal-recipes.html
+ x = F(1)
+ i, lasts, s, fact, num, sign = 0, 0, F(1), 1, 1, 1
+ while abs(s - lasts) > F(1, 10**9):
+ lasts = s
+ i += 2
+ fact *= i * (i-1)
+ num *= x * x
+ sign *= -1
+ s += num / fact * sign
+ self.assertAlmostEqual(math.cos(1), s)
+
+ def test_copy_deepcopy_pickle(self):
+ r = F(13, 7)
+ dr = DummyFraction(13, 7)
+ self.assertEqual(r, loads(dumps(r)))
+ self.assertEqual(id(r), id(copy(r)))
+ self.assertEqual(id(r), id(deepcopy(r)))
+ self.assertNotEqual(id(dr), id(copy(dr)))
+ self.assertNotEqual(id(dr), id(deepcopy(dr)))
+ self.assertTypedEquals(dr, copy(dr))
+ self.assertTypedEquals(dr, deepcopy(dr))
+
+ def test_slots(self):
+ # Issue 4998
+ r = F(13, 7)
+ self.assertRaises(AttributeError, setattr, r, 'a', 10)
+
+def test_main():
+ run_unittest(FractionTest, GcdTest)
+
+if __name__ == '__main__':
+ test_main()
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-05 02:01:05 +0000