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https://github.com/python/cpython.git
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3ccec68a05
- Specialcase extended slices that amount to a shallow copy the same way as is done for simple slices, in the tuple, string and unicode case. - Specialcase step-1 extended slices to optimize the common case for all involved types. - For lists, allow extended slice assignment of differing lengths as long as the step is 1. (Previously, 'l[:2:1] = []' failed even though 'l[:2] = []' and 'l[:2:None] = []' do not.) - Implement extended slicing for buffer, array, structseq, mmap and UserString.UserString. - Implement slice-object support (but not non-step-1 slice assignment) for UserString.MutableString. - Add tests for all new functionality.
116 lines
3.4 KiB
Python
116 lines
3.4 KiB
Python
import unittest
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from test import test_support
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import time
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class StructSeqTest(unittest.TestCase):
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def test_tuple(self):
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t = time.gmtime()
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astuple = tuple(t)
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self.assertEqual(len(t), len(astuple))
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self.assertEqual(t, astuple)
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# Check that slicing works the same way; at one point, slicing t[i:j] with
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# 0 < i < j could produce NULLs in the result.
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for i in xrange(-len(t), len(t)):
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self.assertEqual(t[i:], astuple[i:])
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for j in xrange(-len(t), len(t)):
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self.assertEqual(t[i:j], astuple[i:j])
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for j in xrange(-len(t), len(t)):
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self.assertEqual(t[:j], astuple[:j])
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self.assertRaises(IndexError, t.__getitem__, -len(t)-1)
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self.assertRaises(IndexError, t.__getitem__, len(t))
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for i in xrange(-len(t), len(t)-1):
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self.assertEqual(t[i], astuple[i])
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def test_repr(self):
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t = time.gmtime()
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repr(t)
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def test_concat(self):
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t1 = time.gmtime()
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t2 = t1 + tuple(t1)
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for i in xrange(len(t1)):
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self.assertEqual(t2[i], t2[i+len(t1)])
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def test_repeat(self):
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t1 = time.gmtime()
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t2 = 3 * t1
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for i in xrange(len(t1)):
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self.assertEqual(t2[i], t2[i+len(t1)])
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self.assertEqual(t2[i], t2[i+2*len(t1)])
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def test_contains(self):
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t1 = time.gmtime()
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for item in t1:
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self.assert_(item in t1)
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self.assert_(-42 not in t1)
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def test_hash(self):
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t1 = time.gmtime()
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self.assertEqual(hash(t1), hash(tuple(t1)))
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def test_cmp(self):
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t1 = time.gmtime()
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t2 = type(t1)(t1)
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self.assertEqual(t1, t2)
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self.assert_(not (t1 < t2))
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self.assert_(t1 <= t2)
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self.assert_(not (t1 > t2))
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self.assert_(t1 >= t2)
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self.assert_(not (t1 != t2))
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def test_fields(self):
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t = time.gmtime()
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self.assertEqual(len(t), t.n_fields)
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self.assertEqual(t.n_fields, t.n_sequence_fields+t.n_unnamed_fields)
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def test_constructor(self):
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t = time.struct_time
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self.assertRaises(TypeError, t)
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self.assertRaises(TypeError, t, None)
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self.assertRaises(TypeError, t, "123")
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self.assertRaises(TypeError, t, "123", dict={})
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self.assertRaises(TypeError, t, "123456789", dict=None)
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s = "123456789"
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self.assertEqual("".join(t(s)), s)
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def test_eviltuple(self):
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class Exc(Exception):
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pass
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# Devious code could crash structseqs' contructors
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class C:
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def __getitem__(self, i):
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raise Exc
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def __len__(self):
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return 9
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self.assertRaises(Exc, time.struct_time, C())
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def test_reduce(self):
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t = time.gmtime()
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x = t.__reduce__()
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def test_extended_getslice(self):
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# Test extended slicing by comparing with list slicing.
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t = time.gmtime()
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L = list(t)
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indices = (0, None, 1, 3, 19, 300, -1, -2, -31, -300)
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for start in indices:
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for stop in indices:
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# Skip step 0 (invalid)
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for step in indices[1:]:
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self.assertEqual(list(t[start:stop:step]),
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L[start:stop:step])
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def test_main():
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test_support.run_unittest(StructSeqTest)
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if __name__ == "__main__":
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test_main()
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