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Diffstat (limited to 'lib/python2.7/test/test_xrange.py')
| -rw-r--r-- | lib/python2.7/test/test_xrange.py | 218 |
1 files changed, 0 insertions, 218 deletions
diff --git a/lib/python2.7/test/test_xrange.py b/lib/python2.7/test/test_xrange.py deleted file mode 100644 index 83c0e41..0000000 --- a/lib/python2.7/test/test_xrange.py +++ /dev/null @@ -1,218 +0,0 @@ -# Python test set -- built-in functions - -import test.test_support, unittest -import sys -import pickle -import itertools - -import warnings -warnings.filterwarnings("ignore", "integer argument expected", - DeprecationWarning, "unittest") - -# pure Python implementations (3 args only), for comparison -def pyrange(start, stop, step): - if (start - stop) // step < 0: - # replace stop with next element in the sequence of integers - # that are congruent to start modulo step. - stop += (start - stop) % step - while start != stop: - yield start - start += step - -def pyrange_reversed(start, stop, step): - stop += (start - stop) % step - return pyrange(stop - step, start - step, -step) - - -class XrangeTest(unittest.TestCase): - def assert_iterators_equal(self, xs, ys, test_id, limit=None): - # check that an iterator xs matches the expected results ys, - # up to a given limit. - if limit is not None: - xs = itertools.islice(xs, limit) - ys = itertools.islice(ys, limit) - sentinel = object() - pairs = itertools.izip_longest(xs, ys, fillvalue=sentinel) - for i, (x, y) in enumerate(pairs): - if x == y: - continue - elif x == sentinel: - self.fail('{}: iterator ended unexpectedly ' - 'at position {}; expected {}'.format(test_id, i, y)) - elif y == sentinel: - self.fail('{}: unexpected excess element {} at ' - 'position {}'.format(test_id, x, i)) - else: - self.fail('{}: wrong element at position {};' - 'expected {}, got {}'.format(test_id, i, y, x)) - - def assert_xranges_equivalent(self, x, y): - # Check that two xrange objects are equivalent, in the sense of the - # associated sequences being the same. We want to use this for large - # xrange objects, so instead of converting to lists and comparing - # directly we do a number of indirect checks. - if len(x) != len(y): - self.fail('{} and {} have different ' - 'lengths: {} and {} '.format(x, y, len(x), len(y))) - if len(x) >= 1: - if x[0] != y[0]: - self.fail('{} and {} have different initial ' - 'elements: {} and {} '.format(x, y, x[0], y[0])) - if x[-1] != y[-1]: - self.fail('{} and {} have different final ' - 'elements: {} and {} '.format(x, y, x[-1], y[-1])) - if len(x) >= 2: - x_step = x[1] - x[0] - y_step = y[1] - y[0] - if x_step != y_step: - self.fail('{} and {} have different step: ' - '{} and {} '.format(x, y, x_step, y_step)) - - 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.assertIn(a, seq) - self.assertNotIn(b, seq) - self.assertEqual(len(seq), 2) - - seq = list(xrange(b, a, -c)) - self.assertIn(b, seq) - self.assertNotIn(a, seq) - self.assertEqual(len(seq), 2) - - seq = list(xrange(-a, -b, -c)) - self.assertIn(-a, seq) - self.assertNotIn(-b, 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, 10**100, 10**101, 10**101) - - self.assertRaises(TypeError, xrange, 0, "spam") - self.assertRaises(TypeError, xrange, 0, 42, "spam") - - self.assertEqual(len(xrange(0, sys.maxint, sys.maxint-1)), 2) - - self.assertRaises(OverflowError, xrange, -sys.maxint, sys.maxint) - self.assertRaises(OverflowError, xrange, 0, 2*sys.maxint) - - r = xrange(-sys.maxint, sys.maxint, 2) - self.assertEqual(len(r), sys.maxint) - self.assertRaises(OverflowError, xrange, -sys.maxint-1, sys.maxint, 2) - - def test_pickling(self): - testcases = [(13,), (0, 11), (-22, 10), (20, 3, -1), - (13, 21, 3), (-2, 2, 2)] - for proto in range(pickle.HIGHEST_PROTOCOL + 1): - for t in testcases: - r = xrange(*t) - self.assertEqual(list(pickle.loads(pickle.dumps(r, proto))), - list(r)) - - M = min(sys.maxint, sys.maxsize) - large_testcases = testcases + [ - (0, M, 1), - (M, 0, -1), - (0, M, M - 1), - (M // 2, M, 1), - (0, -M, -1), - (0, -M, 1 - M), - (-M, M, 2), - (-M, M, 1024), - (-M, M, 10585), - (M, -M, -2), - (M, -M, -1024), - (M, -M, -10585), - ] - for proto in range(pickle.HIGHEST_PROTOCOL + 1): - for t in large_testcases: - r = xrange(*t) - r_out = pickle.loads(pickle.dumps(r, proto)) - self.assert_xranges_equivalent(r_out, r) - - def test_repr(self): - # Check that repr of an xrange is a valid representation - # of that xrange. - - # Valid xranges have at most min(sys.maxint, sys.maxsize) elements. - M = min(sys.maxint, sys.maxsize) - - testcases = [ - (13,), - (0, 11), - (-22, 10), - (20, 3, -1), - (13, 21, 3), - (-2, 2, 2), - (0, M, 1), - (M, 0, -1), - (0, M, M - 1), - (M // 2, M, 1), - (0, -M, -1), - (0, -M, 1 - M), - (-M, M, 2), - (-M, M, 1024), - (-M, M, 10585), - (M, -M, -2), - (M, -M, -1024), - (M, -M, -10585), - ] - for t in testcases: - r = xrange(*t) - r_out = eval(repr(r)) - self.assert_xranges_equivalent(r, r_out) - - def test_range_iterators(self): - # see issue 7298 - limits = [base + jiggle - for M in (2**32, 2**64) - for base in (-M, -M//2, 0, M//2, M) - for jiggle in (-2, -1, 0, 1, 2)] - test_ranges = [(start, end, step) - for start in limits - for end in limits - for step in (-2**63, -2**31, -2, -1, 1, 2)] - - for start, end, step in test_ranges: - try: - iter1 = xrange(start, end, step) - except OverflowError: - pass - else: - iter2 = pyrange(start, end, step) - test_id = "xrange({}, {}, {})".format(start, end, step) - # check first 100 entries - self.assert_iterators_equal(iter1, iter2, test_id, limit=100) - - try: - iter1 = reversed(xrange(start, end, step)) - except OverflowError: - pass - else: - iter2 = pyrange_reversed(start, end, step) - test_id = "reversed(xrange({}, {}, {}))".format(start, end, step) - self.assert_iterators_equal(iter1, iter2, test_id, limit=100) - - -def test_main(): - test.test_support.run_unittest(XrangeTest) - -if __name__ == "__main__": - test_main() |