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Fix PR#7 comparisons of recursive objects

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Note that comparisons of deeply nested objects can still dump core in
extreme cases.
This commit is contained in:
Jeremy Hylton 2000-04-14 19:13:24 +00:00
parent 0556501a81
commit 4a3dd2dcc2
4 changed files with 126 additions and 3 deletions
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9
Lib/test/test_b1.py
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@ -63,6 +63,15 @@ print 'cmp'
if cmp(-1, 1) <> -1: raise TestFailed, 'cmp(-1, 1)'
if cmp(1, -1) <> 1: raise TestFailed, 'cmp(1, -1)'
if cmp(1, 1) <> 0: raise TestFailed, 'cmp(1, 1)'
# verify that circular objects are handled
a = []; a.append(a)
b = []; b.append(b)
from UserList import UserList
c = UserList(); c.append(c)
if cmp(a, b) != 0: raise TestFailed, "cmp(%s, %s)" % (a, b)
if cmp(b, c) != 0: raise TestFailed, "cmp(%s, %s)" % (b, c)
if cmp(c, a) != 0: raise TestFailed, "cmp(%s, %s)" % (c, a)
if cmp(a, c) != 0: raise TestFailed, "cmp(%s, %s)" % (a, c)
print 'coerce'
if fcmp(coerce(1, 1.1), (1.0, 1.1)): raise TestFailed, 'coerce(1, 1.1)'