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feec4533e2
Added XXX comment about why the undocumented PyRange_New() API function is too broken to be worth the considerable pain of repairing. Changed range_new() to stop using PyRange_New(). This fixes a variety of bogus errors. Nothing in the core uses PyRange_New() now. Documented that xrange() is intended to be simple and fast, and that CPython restricts its arguments, and length of its result sequence, to native C longs. Added some tests that failed before the patch, and repaired a test that relied on a bogus OverflowError getting raised.
64 lines
2.1 KiB
Python
64 lines
2.1 KiB
Python
# Python test set -- built-in functions
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import test.test_support, unittest
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import sys
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import warnings
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warnings.filterwarnings("ignore", "integer argument expected",
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DeprecationWarning, "unittest")
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class XrangeTest(unittest.TestCase):
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def test_xrange(self):
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self.assertEqual(list(xrange(3)), [0, 1, 2])
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self.assertEqual(list(xrange(1, 5)), [1, 2, 3, 4])
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self.assertEqual(list(xrange(0)), [])
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self.assertEqual(list(xrange(-3)), [])
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self.assertEqual(list(xrange(1, 10, 3)), [1, 4, 7])
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self.assertEqual(list(xrange(5, -5, -3)), [5, 2, -1, -4])
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a = 10
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b = 100
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c = 50
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self.assertEqual(list(xrange(a, a+2)), [a, a+1])
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self.assertEqual(list(xrange(a+2, a, -1L)), [a+2, a+1])
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self.assertEqual(list(xrange(a+4, a, -2)), [a+4, a+2])
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seq = list(xrange(a, b, c))
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self.assert_(a in seq)
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self.assert_(b not in seq)
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self.assertEqual(len(seq), 2)
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seq = list(xrange(b, a, -c))
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self.assert_(b in seq)
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self.assert_(a not in seq)
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self.assertEqual(len(seq), 2)
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seq = list(xrange(-a, -b, -c))
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self.assert_(-a in seq)
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self.assert_(-b not in seq)
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self.assertEqual(len(seq), 2)
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self.assertRaises(TypeError, xrange)
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self.assertRaises(TypeError, xrange, 1, 2, 3, 4)
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self.assertRaises(ValueError, xrange, 1, 2, 0)
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self.assertRaises(OverflowError, xrange, 1e100, 1e101, 1e101)
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self.assertRaises(TypeError, xrange, 0, "spam")
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self.assertRaises(TypeError, xrange, 0, 42, "spam")
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self.assertEqual(len(xrange(0, sys.maxint, sys.maxint-1)), 2)
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self.assertRaises(OverflowError, xrange, -sys.maxint, sys.maxint)
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self.assertRaises(OverflowError, xrange, 0, 2*sys.maxint)
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self.assertEqual(len(xrange(-sys.maxint, sys.maxint, 2)),
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sys.maxint)
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self.assertRaises(OverflowError, xrange, -sys.maxint-1, sys.maxint, 2)
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def test_main():
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test.test_support.run_unittest(XrangeTest)
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if __name__ == "__main__":
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test_main()
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