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#16886: merge with 3.2

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Frank Wierzbicki 2013-01-16 13:56:54 -08:00
commit fb3bd161cb
1 changed files with 77 additions and 40 deletions
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117
Lib/test/test_dictcomps.py
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@ -1,54 +1,91 @@
import unittest
doctests = """
from test import support
>>> k = "old value"
>>> { k: None for k in range(10) }
{0: None, 1: None, 2: None, 3: None, 4: None, 5: None, 6: None, 7: None, 8: None, 9: None}
>>> k
'old value'
# For scope testing.
g = "Global variable"
>>> { k: k+10 for k in range(10) }
{0: 10, 1: 11, 2: 12, 3: 13, 4: 14, 5: 15, 6: 16, 7: 17, 8: 18, 9: 19}
>>> g = "Global variable"
>>> { k: g for k in range(10) }
{0: 'Global variable', 1: 'Global variable', 2: 'Global variable', 3: 'Global variable', 4: 'Global variable', 5: 'Global variable', 6: 'Global variable', 7: 'Global variable', 8: 'Global variable', 9: 'Global variable'}
class DictComprehensionTest(unittest.TestCase):
>>> { k: v for k in range(10) for v in range(10) if k == v }
{0: 0, 1: 1, 2: 2, 3: 3, 4: 4, 5: 5, 6: 6, 7: 7, 8: 8, 9: 9}
def test_basics(self):
expected = {0: 10, 1: 11, 2: 12, 3: 13, 4: 14, 5: 15, 6: 16, 7: 17,
8: 18, 9: 19}
actual = {k: k + 10 for k in range(10)}
self.assertEqual(actual, expected)
>>> { k: v for v in range(10) for k in range(v*9, v*10) }
{9: 1, 18: 2, 19: 2, 27: 3, 28: 3, 29: 3, 36: 4, 37: 4, 38: 4, 39: 4, 45: 5, 46: 5, 47: 5, 48: 5, 49: 5, 54: 6, 55: 6, 56: 6, 57: 6, 58: 6, 59: 6, 63: 7, 64: 7, 65: 7, 66: 7, 67: 7, 68: 7, 69: 7, 72: 8, 73: 8, 74: 8, 75: 8, 76: 8, 77: 8, 78: 8, 79: 8, 81: 9, 82: 9, 83: 9, 84: 9, 85: 9, 86: 9, 87: 9, 88: 9, 89: 9}
expected = {0: 0, 1: 1, 2: 2, 3: 3, 4: 4, 5: 5, 6: 6, 7: 7, 8: 8, 9: 9}
actual = {k: v for k in range(10) for v in range(10) if k == v}
self.assertEqual(actual, expected)
>>> { x: y for y, x in ((1, 2), (3, 4)) } = 5 # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
...
SyntaxError: ...
def test_scope_isolation(self):
k = "Local Variable"
>>> { x: y for y, x in ((1, 2), (3, 4)) } += 5 # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
...
SyntaxError: ...
expected = {0: None, 1: None, 2: None, 3: None, 4: None, 5: None,
6: None, 7: None, 8: None, 9: None}
actual = {k: None for k in range(10)}
self.assertEqual(actual, expected)
self.assertEqual(k, "Local Variable")
"""
expected = {9: 1, 18: 2, 19: 2, 27: 3, 28: 3, 29: 3, 36: 4, 37: 4,
38: 4, 39: 4, 45: 5, 46: 5, 47: 5, 48: 5, 49: 5, 54: 6,
55: 6, 56: 6, 57: 6, 58: 6, 59: 6, 63: 7, 64: 7, 65: 7,
66: 7, 67: 7, 68: 7, 69: 7, 72: 8, 73: 8, 74: 8, 75: 8,
76: 8, 77: 8, 78: 8, 79: 8, 81: 9, 82: 9, 83: 9, 84: 9,
85: 9, 86: 9, 87: 9, 88: 9, 89: 9}
actual = {k: v for v in range(10) for k in range(v * 9, v * 10)}
self.assertEqual(k, "Local Variable")
self.assertEqual(actual, expected)
__test__ = {'doctests' : doctests}
def test_scope_isolation_from_global(self):
expected = {0: None, 1: None, 2: None, 3: None, 4: None, 5: None,
6: None, 7: None, 8: None, 9: None}
actual = {g: None for g in range(10)}
self.assertEqual(actual, expected)
self.assertEqual(g, "Global variable")
def test_main(verbose=None):
import sys
from test import support
from test import test_dictcomps
support.run_doctest(test_dictcomps, verbose)
expected = {9: 1, 18: 2, 19: 2, 27: 3, 28: 3, 29: 3, 36: 4, 37: 4,
38: 4, 39: 4, 45: 5, 46: 5, 47: 5, 48: 5, 49: 5, 54: 6,
55: 6, 56: 6, 57: 6, 58: 6, 59: 6, 63: 7, 64: 7, 65: 7,
66: 7, 67: 7, 68: 7, 69: 7, 72: 8, 73: 8, 74: 8, 75: 8,
76: 8, 77: 8, 78: 8, 79: 8, 81: 9, 82: 9, 83: 9, 84: 9,
85: 9, 86: 9, 87: 9, 88: 9, 89: 9}
actual = {g: v for v in range(10) for g in range(v * 9, v * 10)}
self.assertEqual(g, "Global variable")
self.assertEqual(actual, expected)
# verify reference counting
if verbose and hasattr(sys, "gettotalrefcount"):
import gc
counts = [None] * 5
for i in range(len(counts)):
support.run_doctest(test_dictcomps, verbose)
gc.collect()
counts[i] = sys.gettotalrefcount()
print(counts)
def test_global_visibility(self):
expected = {0: 'Global variable', 1: 'Global variable',
2: 'Global variable', 3: 'Global variable',
4: 'Global variable', 5: 'Global variable',
6: 'Global variable', 7: 'Global variable',
8: 'Global variable', 9: 'Global variable'}
actual = {k: g for k in range(10)}
self.assertEqual(actual, expected)
def test_local_visibility(self):
v = "Local variable"
expected = {0: 'Local variable', 1: 'Local variable',
2: 'Local variable', 3: 'Local variable',
4: 'Local variable', 5: 'Local variable',
6: 'Local variable', 7: 'Local variable',
8: 'Local variable', 9: 'Local variable'}
actual = {k: v for k in range(10)}
self.assertEqual(actual, expected)
self.assertEqual(v, "Local variable")
def test_illegal_assignment(self):
with self.assertRaisesRegex(SyntaxError, "can't assign"):
compile("{x: y for y, x in ((1, 2), (3, 4))} = 5", "<test>",
"exec")
with self.assertRaisesRegex(SyntaxError, "can't assign"):
compile("{x: y for y, x in ((1, 2), (3, 4))} += 5", "<test>",
"exec")
def test_main():
support.run_unittest(__name__)
if __name__ == "__main__":
test_main(verbose=True)
test_main()