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Marc-Andre Lemburg <mal@lemburg.com>:

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New test for huge formatting strings (these could cause core
dumps in previous versions).

By Trent Mick.
This commit is contained in:
Marc-André Lemburg 2000-06-30 10:26:29 +00:00
parent e3f257e681
commit d70141a2d9
1 changed files with 52 additions and 0 deletions
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52
Lib/test/test_format.py Normal file
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from test_support import verbose
import string, sys
# test string formatting operator (I am not sure if this is being tested
# elsewhere but, surely, some of the given cases are *not* tested because
# they crash python)
# test on unicode strings as well
def testformat(formatstr, args, output=None):
if verbose:
if output:
print "%s %% %s =? %s ..." %\
(repr(formatstr), repr(args), repr(output)),
else:
print "%s %% %s works? ..." % (repr(formatstr), repr(args)),
try:
result = formatstr % args
except OverflowError:
if verbose:
print 'overflow (this is fine)'
else:
if output and result != output:
if verbose:
print 'no'
print "%s %% %s == %s != %s" %\
(repr(formatstr), repr(args), repr(result), repr(output))
else:
if verbose:
print 'yes'
def testboth(formatstr, *args):
testformat(formatstr, *args)
testformat(unicode(formatstr), *args)
testboth("%.1d", (1,), "1")
testboth("%.*d", (sys.maxint,1)) # expect overflow
testboth("%.100d", (1,), '0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001')
testboth("%#.117x", (1,), '0x000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001')
testboth("%#.118x", (1,), '0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001')
testboth("%f", (1.0,), "1.000000")
# these are trying to test the limits of the internal magic-number-length
# formatting buffer, if that number changes then these tests are less
# effective
testboth("%#.*g", (109, -1.e+49/3.))
testboth("%#.*g", (110, -1.e+49/3.))
testboth("%#.*g", (110, -1.e+100/3.))
# test some ridiculously large precision, expect overflow
testboth('%12.*f', (123456, 1.0))