mirror of
https://github.com/python/cpython.git
synced 2025-10-31 21:51:50 +00:00
04f357cffe
imports e.g. test_support must do so using an absolute package name such as "import test.test_support" or "from test import test_support". This also updates the README in Lib/test, and gets rid of the duplicate data dirctory in Lib/test/data (replaced by Lib/email/test/data). Now Tim and Jack can have at it. :)
55 lines
1.9 KiB
Python
55 lines
1.9 KiB
Python
from __future__ import division
|
|
# When true division is the default, get rid of this and add it to
|
|
# test_long.py instead. In the meantime, it's too obscure to try to
|
|
# trick just part of test_long into using future division.
|
|
|
|
from test.test_support import TestFailed, verify, verbose
|
|
|
|
def test_true_division():
|
|
if verbose:
|
|
print "long true division"
|
|
huge = 1L << 40000
|
|
mhuge = -huge
|
|
verify(huge / huge == 1.0)
|
|
verify(mhuge / mhuge == 1.0)
|
|
verify(huge / mhuge == -1.0)
|
|
verify(mhuge / huge == -1.0)
|
|
verify(1 / huge == 0.0)
|
|
verify(1L / huge == 0.0)
|
|
verify(1 / mhuge == 0.0)
|
|
verify(1L / mhuge == 0.0)
|
|
verify((666 * huge + (huge >> 1)) / huge == 666.5)
|
|
verify((666 * mhuge + (mhuge >> 1)) / mhuge == 666.5)
|
|
verify((666 * huge + (huge >> 1)) / mhuge == -666.5)
|
|
verify((666 * mhuge + (mhuge >> 1)) / huge == -666.5)
|
|
verify(huge / (huge << 1) == 0.5)
|
|
verify((1000000 * huge) / huge == 1000000)
|
|
|
|
namespace = {'huge': huge, 'mhuge': mhuge}
|
|
|
|
for overflow in ["float(huge)", "float(mhuge)",
|
|
"huge / 1", "huge / 2L", "huge / -1", "huge / -2L",
|
|
"mhuge / 100", "mhuge / 100L"]:
|
|
try:
|
|
eval(overflow, namespace)
|
|
except OverflowError:
|
|
pass
|
|
else:
|
|
raise TestFailed("expected OverflowError from %r" % overflow)
|
|
|
|
for underflow in ["1 / huge", "2L / huge", "-1 / huge", "-2L / huge",
|
|
"100 / mhuge", "100L / mhuge"]:
|
|
result = eval(underflow, namespace)
|
|
if result != 0.0:
|
|
raise TestFailed("expected underflow to 0 from %r" % underflow)
|
|
|
|
for zero in ["huge / 0", "huge / 0L",
|
|
"mhuge / 0", "mhuge / 0L"]:
|
|
try:
|
|
eval(zero, namespace)
|
|
except ZeroDivisionError:
|
|
pass
|
|
else:
|
|
raise TestFailed("expected ZeroDivisionError from %r" % zero)
|
|
|
|
test_true_division()
|