![Vishal Talwar](/assets/img/avatar_default.png)
added python.path vm arg to startup script fixed infinite loop in unwrap() when displaying sequences of sequences git-svn-id: http://google-refine.googlecode.com/svn/trunk@509 7d457c2a-affb-35e4-300a-418c747d4874
102 lines
3.2 KiB
Python
102 lines
3.2 KiB
Python
import unittest
|
|
from test import test_support, seq_tests
|
|
|
|
class TupleTest(seq_tests.CommonTest):
|
|
type2test = tuple
|
|
|
|
def test_constructors(self):
|
|
super(TupleTest, self).test_len()
|
|
# calling built-in types without argument must return empty
|
|
self.assertEqual(tuple(), ())
|
|
|
|
def test_truth(self):
|
|
super(TupleTest, self).test_truth()
|
|
self.assert_(not ())
|
|
self.assert_((42, ))
|
|
|
|
def test_len(self):
|
|
super(TupleTest, self).test_len()
|
|
self.assertEqual(len(()), 0)
|
|
self.assertEqual(len((0,)), 1)
|
|
self.assertEqual(len((0, 1, 2)), 3)
|
|
|
|
def test_iadd(self):
|
|
super(TupleTest, self).test_iadd()
|
|
u = (0, 1)
|
|
u2 = u
|
|
u += (2, 3)
|
|
self.assert_(u is not u2)
|
|
|
|
def test_imul(self):
|
|
super(TupleTest, self).test_imul()
|
|
u = (0, 1)
|
|
u2 = u
|
|
u *= 3
|
|
self.assert_(u is not u2)
|
|
|
|
def test_tupleresizebug(self):
|
|
# Check that a specific bug in _PyTuple_Resize() is squashed.
|
|
def f():
|
|
for i in range(1000):
|
|
yield i
|
|
self.assertEqual(list(tuple(f())), range(1000))
|
|
|
|
def test_hash(self):
|
|
from java.lang import OutOfMemoryError
|
|
try:
|
|
self._test_hash()
|
|
except OutOfMemoryError, oome:
|
|
oome.printStackTrace()
|
|
raise
|
|
|
|
def _test_hash(self):
|
|
# See SF bug 942952: Weakness in tuple hash
|
|
# The hash should:
|
|
# be non-commutative
|
|
# should spread-out closely spaced values
|
|
# should not exhibit cancellation in tuples like (x,(x,y))
|
|
# should be distinct from element hashes: hash(x)!=hash((x,))
|
|
# This test exercises those cases.
|
|
# For a pure random hash and N=50, the expected number of occupied
|
|
# buckets when tossing 252,600 balls into 2**32 buckets
|
|
# is 252,592.6, or about 7.4 expected collisions. The
|
|
# standard deviation is 2.73. On a box with 64-bit hash
|
|
# codes, no collisions are expected. Here we accept no
|
|
# more than 15 collisions. Any worse and the hash function
|
|
# is sorely suspect.
|
|
|
|
N=50
|
|
base = range(N)
|
|
xp = [(i, j) for i in base for j in base]
|
|
inps = base + [(i, j) for i in base for j in xp] + \
|
|
[(i, j) for i in xp for j in base] + xp + zip(base)
|
|
hashes = map(hash, inps)
|
|
unique = set(hashes)
|
|
unique_len = len(unique)
|
|
collisions = len(inps) - unique_len
|
|
#collisions = len(inps) - len(set(map(hash, inps)))
|
|
self.assert_(collisions <= 15)
|
|
|
|
def test_repr(self):
|
|
l0 = tuple()
|
|
l2 = (0, 1, 2)
|
|
a0 = self.type2test(l0)
|
|
a2 = self.type2test(l2)
|
|
|
|
self.assertEqual(str(a0), repr(l0))
|
|
self.assertEqual(str(a2), repr(l2))
|
|
self.assertEqual(repr(a0), "()")
|
|
self.assertEqual(repr(a2), "(0, 1, 2)")
|
|
|
|
def test_setitem(self):
|
|
#This test is equivalent to (1,2)[0] = 0 which was briefly broken in
|
|
#Jython 2.5b2
|
|
import operator
|
|
self.assertRaises(TypeError, operator.setitem, (1,2), 0, 0)
|
|
|
|
def test_main():
|
|
test_support.run_unittest(TupleTest)
|
|
|
|
if __name__=="__main__":
|
|
test_main()
|