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Issue #665761: functools.reduce() will no longer mask exceptions other

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than TypeError raised by the iterator argument.  Also added a test to
check that zip() already behaves similarly.
This commit is contained in:
Alexander Belopolsky 2010-08-16 18:55:46 +00:00
parent 27354ccec9
commit e29e6bffb5
4 changed files with 26 additions and 8 deletions
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25
Lib/test/test_functools.py
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@ -321,10 +321,11 @@ class TestReduce(unittest.TestCase):
self.sofar.append(n*n)
n += 1
return self.sofar[i]
self.assertEqual(self.func(lambda x, y: x+y, ['a', 'b', 'c'], ''), 'abc')
def add(x, y):
return x + y
self.assertEqual(self.func(add, ['a', 'b', 'c'], ''), 'abc')
self.assertEqual(
self.func(lambda x, y: x+y, [['a', 'c'], [], ['d', 'w']], []),
self.func(add, [['a', 'c'], [], ['d', 'w']], []),
['a','c','d','w']
)
self.assertEqual(self.func(lambda x, y: x*y, range(2,8), 1), 5040)
@ -332,15 +333,27 @@ class TestReduce(unittest.TestCase):
self.func(lambda x, y: x*y, range(2,21), 1),
2432902008176640000
)
self.assertEqual(self.func(lambda x, y: x+y, Squares(10)), 285)
self.assertEqual(self.func(lambda x, y: x+y, Squares(10), 0), 285)
self.assertEqual(self.func(lambda x, y: x+y, Squares(0), 0), 0)
self.assertEqual(self.func(add, Squares(10)), 285)
self.assertEqual(self.func(add, Squares(10), 0), 285)
self.assertEqual(self.func(add, Squares(0), 0), 0)
self.assertRaises(TypeError, self.func)
self.assertRaises(TypeError, self.func, 42, 42)
self.assertRaises(TypeError, self.func, 42, 42, 42)
self.assertEqual(self.func(42, "1"), "1") # func is never called with one item
self.assertEqual(self.func(42, "", "1"), "1") # func is never called with one item
self.assertRaises(TypeError, self.func, 42, (42, 42))
self.assertRaises(TypeError, self.func, add, []) # arg 2 must not be empty sequence with no initial value
self.assertRaises(TypeError, self.func, add, "")
self.assertRaises(TypeError, self.func, add, ())
self.assertRaises(TypeError, self.func, add, object())
class TestFailingIter:
def __iter__(self):
raise RuntimeError
self.assertRaises(RuntimeError, self.func, add, TestFailingIter())
self.assertEqual(self.func(add, [], None), None)
self.assertEqual(self.func(add, [], 42), 42)
class BadSeq:
def __getitem__(self, index):