mirror of
https://github.com/python/cpython.git
synced 2025-10-31 13:41:24 +00:00
171 lines
4 KiB
Python
171 lines
4 KiB
Python
from test.test_support import verbose
|
|
import random
|
|
|
|
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
|
|
|
|
# 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)
|
|
|
|
def bug453523():
|
|
global nerrors
|
|
from random import random
|
|
|
|
# If this fails, the most likely outcome is a core dump.
|
|
if verbose:
|
|
print "Testing bug 453523 -- list.sort() crasher."
|
|
|
|
class C:
|
|
def __lt__(self, other):
|
|
if L and random() < 0.75:
|
|
pop()
|
|
else:
|
|
push(3)
|
|
return random() < 0.5
|
|
|
|
L = [C() for i in range(50)]
|
|
pop = L.pop
|
|
push = L.append
|
|
try:
|
|
L.sort()
|
|
except ValueError:
|
|
pass
|
|
else:
|
|
print " Mutation during list.sort() wasn't caught."
|
|
nerrors += 1
|
|
|
|
bug453523()
|
|
|
|
def cmpNone():
|
|
global nerrors
|
|
|
|
if verbose:
|
|
print "Testing None as a comparison function."
|
|
|
|
L = range(50)
|
|
random.shuffle(L)
|
|
try:
|
|
L.sort(None)
|
|
except TypeError:
|
|
print " Passing None as cmpfunc failed."
|
|
nerrors += 1
|
|
else:
|
|
if L != range(50):
|
|
print " Passing None as cmpfunc failed."
|
|
nerrors += 1
|
|
|
|
cmpNone()
|
|
|
|
if nerrors:
|
|
print "Test failed", nerrors
|
|
elif verbose:
|
|
print "Test passed -- no errors."
|