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Added additional __sizeof__ implementations and addressed comments made in

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Issue3122.
This commit is contained in:
Robert Schuppenies 2008-07-10 15:24:04 +00:00
parent cc3f2b1d16
commit 9be2ec109b
6 changed files with 105 additions and 35 deletions
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65
Lib/test/test_sys.py
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@ -408,14 +408,11 @@ class SizeofTest(unittest.TestCase):
self.file.close()
test.test_support.unlink(test.test_support.TESTFN)
def check_sizeof(self, o, size, size2=None):
"""Check size of o. Possible are size and optionally size2)."""
def check_sizeof(self, o, size):
result = sys.getsizeof(o)
msg = 'wrong size for %s: got %d, expected ' % (type(o), result)
if (size2 != None) and (result != size):
self.assertEqual(result, size2, msg + str(size2))
else:
self.assertEqual(result, size, msg + str(size))
msg = 'wrong size for %s: got %d, expected %d' \
% (type(o), result, size)
self.assertEqual(result, size, msg)
def calcsize(self, fmt):
"""Wrapper around struct.calcsize which enforces the alignment of the
@ -438,6 +435,13 @@ class SizeofTest(unittest.TestCase):
check(buffer(''), size(h + '2P2Pil'))
# builtin_function_or_method
check(len, size(h + '3P'))
# bytearray
samples = ['', 'u'*100000]
for sample in samples:
x = bytearray(sample)
check(x, size(vh + 'iPP') + x.__alloc__() * self.c)
# bytearray_iterator
check(iter(bytearray()), size(h + 'PP'))
# cell
def get_cell():
x = 42
@ -507,6 +511,17 @@ class SizeofTest(unittest.TestCase):
check(float(0), size(h + 'd'))
# sys.floatinfo
check(sys.float_info, size(vh) + self.P * len(sys.float_info))
# frame
import inspect
CO_MAXBLOCKS = 20
x = inspect.currentframe()
ncells = len(x.f_code.co_cellvars)
nfrees = len(x.f_code.co_freevars)
extras = x.f_code.co_stacksize + x.f_code.co_nlocals +\
ncells + nfrees - 1
check(x, size(vh + '12P3i') +\
CO_MAXBLOCKS*struct.calcsize('3i') +\
self.P + extras*self.P)
# function
def func(): pass
check(func, size(h + '9P'))
@ -545,7 +560,7 @@ class SizeofTest(unittest.TestCase):
# listreverseiterator (list)
check(reversed([]), size(h + 'lP'))
# long
check(0L, size(vh + 'H'))
check(0L, size(vh + 'H') - self.H)
check(1L, size(vh + 'H'))
check(-1L, size(vh + 'H'))
check(32768L, size(vh + 'H') + self.H)
@ -570,6 +585,29 @@ class SizeofTest(unittest.TestCase):
check(iter(xrange(1)), size(h + '4l'))
# reverse
check(reversed(''), size(h + 'PP'))
# set
# frozenset
PySet_MINSIZE = 8
samples = [[], range(10), range(50)]
s = size(h + '3P2P') +\
PySet_MINSIZE*struct.calcsize('lP') + self.l + self.P
for sample in samples:
minused = len(sample)
if minused == 0: tmp = 1
# the computation of minused is actually a bit more complicated
# but this suffices for the sizeof test
minused = minused*2
newsize = PySet_MINSIZE
while newsize <= minused:
newsize = newsize << 1
if newsize <= 8:
check(set(sample), s)
check(frozenset(sample), s)
else:
check(set(sample), s + newsize*struct.calcsize('lP'))
check(frozenset(sample), s + newsize*struct.calcsize('lP'))
# setiterator
check(iter(set()), size(h + 'P3P'))
# slice
check(slice(1), size(h + '3P'))
# str
@ -600,16 +638,7 @@ class SizeofTest(unittest.TestCase):
# we need to test for both sizes, because we don't know if the string
# has been cached
for s in samples:
basicsize = size(h + 'PPlP') + usize * (len(s) + 1)
check(s, basicsize, size2=basicsize + sys.getsizeof(str(s)))
# XXX trigger caching encoded version as Python string
s = samples[1]
try:
getattr(sys, s)
except AttributeError:
pass
finally:
check(s, basicsize + sys.getsizeof(str(s)))
check(s, size(h + 'PPlP') + usize * (len(s) + 1))
# weakref
import weakref
check(weakref.ref(int), size(h + '2Pl2P'))