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be19ed77dd
There's one major and one minor category still unfixed: doctests are the major category (and I hope to be able to augment the refactoring tool to refactor bona fide doctests soon); other code generating print statements in strings is the minor category. (Oh, and I don't know if the compiler package works.)
55 lines
1.9 KiB
Python
55 lines
1.9 KiB
Python
from __future__ import division
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# When true division is the default, get rid of this and add it to
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# test_long.py instead. In the meantime, it's too obscure to try to
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# trick just part of test_long into using future division.
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from test.test_support import TestFailed, verify, verbose
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def test_true_division():
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if verbose:
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print("long true division")
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huge = 1 << 40000
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mhuge = -huge
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verify(huge / huge == 1.0)
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verify(mhuge / mhuge == 1.0)
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verify(huge / mhuge == -1.0)
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verify(mhuge / huge == -1.0)
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verify(1 / huge == 0.0)
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verify(1 / huge == 0.0)
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verify(1 / mhuge == 0.0)
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verify(1 / mhuge == 0.0)
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verify((666 * huge + (huge >> 1)) / huge == 666.5)
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verify((666 * mhuge + (mhuge >> 1)) / mhuge == 666.5)
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verify((666 * huge + (huge >> 1)) / mhuge == -666.5)
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verify((666 * mhuge + (mhuge >> 1)) / huge == -666.5)
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verify(huge / (huge << 1) == 0.5)
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verify((1000000 * huge) / huge == 1000000)
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namespace = {'huge': huge, 'mhuge': mhuge}
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for overflow in ["float(huge)", "float(mhuge)",
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"huge / 1", "huge / 2", "huge / -1", "huge / -2",
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"mhuge / 100", "mhuge / 100"]:
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try:
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eval(overflow, namespace)
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except OverflowError:
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pass
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else:
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raise TestFailed("expected OverflowError from %r" % overflow)
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for underflow in ["1 / huge", "2 / huge", "-1 / huge", "-2 / huge",
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"100 / mhuge", "100 / mhuge"]:
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result = eval(underflow, namespace)
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if result != 0.0:
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raise TestFailed("expected underflow to 0 from %r" % underflow)
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for zero in ["huge / 0", "huge / 0",
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"mhuge / 0", "mhuge / 0"]:
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try:
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eval(zero, namespace)
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except ZeroDivisionError:
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pass
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else:
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raise TestFailed("expected ZeroDivisionError from %r" % zero)
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test_true_division()
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