[Python-checkins] python/dist/src/Lib/test test_xrange.py,NONE,1.1

[nnorwitz at users.sourceforge.net]

Update of /cvsroot/python/python/dist/src/Lib/test
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv9610/Lib/test

Added Files:
	test_xrange.py 
Log Message:
Exercise xrange a bit

--- NEW FILE: test_xrange.py ---
# Python test set -- built-in functions

import test.test_support, unittest
import sys

import warnings
warnings.filterwarnings("ignore", "integer argument expected",
                        DeprecationWarning, "unittest")

class XrangeTest(unittest.TestCase):
    def test_xrange(self):
        self.assertEqual(list(xrange(3)), [0, 1, 2])
        self.assertEqual(list(xrange(1, 5)), [1, 2, 3, 4])
        self.assertEqual(list(xrange(0)), [])
        self.assertEqual(list(xrange(-3)), [])
        self.assertEqual(list(xrange(1, 10, 3)), [1, 4, 7])
        self.assertEqual(list(xrange(5, -5, -3)), [5, 2, -1, -4])

        a = 10
        b = 100
        c = 50

        self.assertEqual(list(xrange(a, a+2)), [a, a+1])
        self.assertEqual(list(xrange(a+2, a, -1L)), [a+2, a+1])
        self.assertEqual(list(xrange(a+4, a, -2)), [a+4, a+2])

        seq = list(xrange(a, b, c))
        self.assert_(a in seq)
        self.assert_(b not in seq)
        self.assertEqual(len(seq), 2)

        seq = list(xrange(b, a, -c))
        self.assert_(b in seq)
        self.assert_(a not in seq)
        self.assertEqual(len(seq), 2)

        seq = list(xrange(-a, -b, -c))
        self.assert_(-a in seq)
        self.assert_(-b not in seq)
        self.assertEqual(len(seq), 2)

        self.assertRaises(TypeError, xrange)
        self.assertRaises(TypeError, xrange, 1, 2, 3, 4)
        self.assertRaises(ValueError, xrange, 1, 2, 0)

        self.assertRaises(OverflowError, xrange, 1e100, 1e101, 1e101)

        self.assertRaises(TypeError, xrange, 0, "spam")
        self.assertRaises(TypeError, xrange, 0, 42, "spam")

        self.assertRaises(OverflowError, xrange, 0, sys.maxint, sys.maxint-1)
        self.assertRaises(OverflowError, xrange, -sys.maxint, sys.maxint)
        self.assertRaises(OverflowError, xrange, 0, 2*sys.maxint)

def test_main():
    test.test_support.run_unittest(XrangeTest)

if __name__ == "__main__":
    test_main()