mirror of
https://github.com/python/cpython.git
synced 2025-11-04 11:49:12 +00:00
289 lines
9 KiB
Python
289 lines
9 KiB
Python
from test import test_support
|
|
import random
|
|
import sys
|
|
import unittest
|
|
|
|
verbose = test_support.verbose
|
|
nerrors = 0
|
|
|
|
def check(tag, expected, raw, compare=None):
|
|
global nerrors
|
|
|
|
if verbose:
|
|
print " checking", tag
|
|
|
|
orig = raw[:] # save input in case of error
|
|
if compare:
|
|
raw.sort(compare)
|
|
else:
|
|
raw.sort()
|
|
|
|
if len(expected) != len(raw):
|
|
print "error in", tag
|
|
print "length mismatch;", len(expected), len(raw)
|
|
print expected
|
|
print orig
|
|
print raw
|
|
nerrors += 1
|
|
return
|
|
|
|
for i, good in enumerate(expected):
|
|
maybe = raw[i]
|
|
if good is not maybe:
|
|
print "error in", tag
|
|
print "out of order at index", i, good, maybe
|
|
print expected
|
|
print orig
|
|
print raw
|
|
nerrors += 1
|
|
return
|
|
|
|
class TestBase(unittest.TestCase):
|
|
def testStressfully(self):
|
|
# Try a variety of sizes at and around powers of 2, and at powers of 10.
|
|
sizes = [0]
|
|
for power in range(1, 10):
|
|
n = 2 ** power
|
|
sizes.extend(range(n-1, n+2))
|
|
sizes.extend([10, 100, 1000])
|
|
|
|
class Complains(object):
|
|
maybe_complain = True
|
|
|
|
def __init__(self, i):
|
|
self.i = i
|
|
|
|
def __lt__(self, other):
|
|
if Complains.maybe_complain and random.random() < 0.001:
|
|
if verbose:
|
|
print " complaining at", self, other
|
|
raise RuntimeError
|
|
return self.i < other.i
|
|
|
|
def __repr__(self):
|
|
return "Complains(%d)" % self.i
|
|
|
|
class Stable(object):
|
|
def __init__(self, key, i):
|
|
self.key = key
|
|
self.index = i
|
|
|
|
def __cmp__(self, other):
|
|
return cmp(self.key, other.key)
|
|
|
|
def __repr__(self):
|
|
return "Stable(%d, %d)" % (self.key, self.index)
|
|
|
|
for n in sizes:
|
|
x = range(n)
|
|
if verbose:
|
|
print "Testing size", n
|
|
|
|
s = x[:]
|
|
check("identity", x, s)
|
|
|
|
s = x[:]
|
|
s.reverse()
|
|
check("reversed", x, s)
|
|
|
|
s = x[:]
|
|
random.shuffle(s)
|
|
check("random permutation", x, s)
|
|
|
|
y = x[:]
|
|
y.reverse()
|
|
s = x[:]
|
|
check("reversed via function", y, s, lambda a, b: cmp(b, a))
|
|
|
|
if verbose:
|
|
print " Checking against an insane comparison function."
|
|
print " If the implementation isn't careful, this may segfault."
|
|
s = x[:]
|
|
s.sort(lambda a, b: int(random.random() * 3) - 1)
|
|
check("an insane function left some permutation", x, s)
|
|
|
|
x = [Complains(i) for i in x]
|
|
s = x[:]
|
|
random.shuffle(s)
|
|
Complains.maybe_complain = True
|
|
it_complained = False
|
|
try:
|
|
s.sort()
|
|
except RuntimeError:
|
|
it_complained = True
|
|
if it_complained:
|
|
Complains.maybe_complain = False
|
|
check("exception during sort left some permutation", x, s)
|
|
|
|
s = [Stable(random.randrange(10), i) for i in xrange(n)]
|
|
augmented = [(e, e.index) for e in s]
|
|
augmented.sort() # forced stable because ties broken by index
|
|
x = [e for e, i in augmented] # a stable sort of s
|
|
check("stability", x, s)
|
|
|
|
#==============================================================================
|
|
|
|
class TestBugs(unittest.TestCase):
|
|
|
|
def test_bug453523(self):
|
|
# bug 453523 -- list.sort() crasher.
|
|
# If this fails, the most likely outcome is a core dump.
|
|
# Mutations during a list sort should raise a ValueError.
|
|
|
|
class C:
|
|
def __lt__(self, other):
|
|
if L and random.random() < 0.75:
|
|
L.pop()
|
|
else:
|
|
L.append(3)
|
|
return random.random() < 0.5
|
|
|
|
L = [C() for i in range(50)]
|
|
self.assertRaises(ValueError, L.sort)
|
|
|
|
def test_cmpNone(self):
|
|
# Testing None as a comparison function.
|
|
|
|
L = range(50)
|
|
random.shuffle(L)
|
|
L.sort(None)
|
|
self.assertEqual(L, range(50))
|
|
|
|
def test_undetected_mutation(self):
|
|
# Python 2.4a1 did not always detect mutation
|
|
memorywaster = []
|
|
for i in range(20):
|
|
def mutating_cmp(x, y):
|
|
L.append(3)
|
|
L.pop()
|
|
return cmp(x, y)
|
|
L = [1,2]
|
|
self.assertRaises(ValueError, L.sort, mutating_cmp)
|
|
def mutating_cmp(x, y):
|
|
L.append(3)
|
|
del L[:]
|
|
return cmp(x, y)
|
|
self.assertRaises(ValueError, L.sort, mutating_cmp)
|
|
memorywaster = [memorywaster]
|
|
|
|
#==============================================================================
|
|
|
|
class TestDecorateSortUndecorate(unittest.TestCase):
|
|
|
|
def test_decorated(self):
|
|
data = 'The quick Brown fox Jumped over The lazy Dog'.split()
|
|
copy = data[:]
|
|
random.shuffle(data)
|
|
data.sort(key=str.lower)
|
|
copy.sort(cmp=lambda x,y: cmp(x.lower(), y.lower()))
|
|
|
|
def test_baddecorator(self):
|
|
data = 'The quick Brown fox Jumped over The lazy Dog'.split()
|
|
self.assertRaises(TypeError, data.sort, None, lambda x,y: 0)
|
|
|
|
def test_stability(self):
|
|
data = [(random.randrange(100), i) for i in xrange(200)]
|
|
copy = data[:]
|
|
data.sort(key=lambda (x,y): x) # sort on the random first field
|
|
copy.sort() # sort using both fields
|
|
self.assertEqual(data, copy) # should get the same result
|
|
|
|
def test_cmp_and_key_combination(self):
|
|
# Verify that the wrapper has been removed
|
|
def compare(x, y):
|
|
self.assertEqual(type(x), str)
|
|
self.assertEqual(type(x), str)
|
|
return cmp(x, y)
|
|
data = 'The quick Brown fox Jumped over The lazy Dog'.split()
|
|
data.sort(cmp=compare, key=str.lower)
|
|
|
|
def test_badcmp_with_key(self):
|
|
# Verify that the wrapper has been removed
|
|
data = 'The quick Brown fox Jumped over The lazy Dog'.split()
|
|
self.assertRaises(TypeError, data.sort, "bad", str.lower)
|
|
|
|
def test_key_with_exception(self):
|
|
# Verify that the wrapper has been removed
|
|
data = range(-2,2)
|
|
dup = data[:]
|
|
self.assertRaises(ZeroDivisionError, data.sort, None, lambda x: 1/x)
|
|
self.assertEqual(data, dup)
|
|
|
|
def test_key_with_mutation(self):
|
|
data = range(10)
|
|
def k(x):
|
|
del data[:]
|
|
data[:] = range(20)
|
|
return x
|
|
self.assertRaises(ValueError, data.sort, key=k)
|
|
|
|
def test_key_with_mutating_del(self):
|
|
data = range(10)
|
|
class SortKiller(object):
|
|
def __init__(self, x):
|
|
pass
|
|
def __del__(self):
|
|
del data[:]
|
|
data[:] = range(20)
|
|
self.assertRaises(ValueError, data.sort, key=SortKiller)
|
|
|
|
def test_key_with_mutating_del_and_exception(self):
|
|
data = range(10)
|
|
## dup = data[:]
|
|
class SortKiller(object):
|
|
def __init__(self, x):
|
|
if x > 2:
|
|
raise RuntimeError
|
|
def __del__(self):
|
|
del data[:]
|
|
data[:] = range(20)
|
|
self.assertRaises(RuntimeError, data.sort, key=SortKiller)
|
|
## major honking subtlety: we *can't* do:
|
|
##
|
|
## self.assertEqual(data, dup)
|
|
##
|
|
## because there is a reference to a SortKiller in the
|
|
## traceback and by the time it dies we're outside the call to
|
|
## .sort() and so the list protection gimmicks are out of
|
|
## date (this cost some brain cells to figure out...).
|
|
|
|
def test_reverse(self):
|
|
data = range(100)
|
|
random.shuffle(data)
|
|
data.sort(reverse=True)
|
|
self.assertEqual(data, range(99,-1,-1))
|
|
self.assertRaises(TypeError, data.sort, "wrong type")
|
|
|
|
def test_reverse_stability(self):
|
|
data = [(random.randrange(100), i) for i in xrange(200)]
|
|
copy1 = data[:]
|
|
copy2 = data[:]
|
|
data.sort(cmp=lambda x,y: cmp(x[0],y[0]), reverse=True)
|
|
copy1.sort(cmp=lambda x,y: cmp(y[0],x[0]))
|
|
self.assertEqual(data, copy1)
|
|
copy2.sort(key=lambda x: x[0], reverse=True)
|
|
self.assertEqual(data, copy2)
|
|
|
|
#==============================================================================
|
|
|
|
def test_main(verbose=None):
|
|
test_classes = (
|
|
TestBase,
|
|
TestDecorateSortUndecorate,
|
|
TestBugs,
|
|
)
|
|
|
|
test_support.run_unittest(*test_classes)
|
|
|
|
# verify reference counting
|
|
if verbose and hasattr(sys, "gettotalrefcount"):
|
|
import gc
|
|
counts = [None] * 5
|
|
for i in xrange(len(counts)):
|
|
test_support.run_unittest(*test_classes)
|
|
gc.collect()
|
|
counts[i] = sys.gettotalrefcount()
|
|
print counts
|
|
|
|
if __name__ == "__main__":
|
|
test_main(verbose=True)
|