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import unittest
from test import test_support
class Empty:
def __repr__(self):
return '<Empty>'
class Coerce:
def __init__(self, arg):
self.arg = arg
def __repr__(self):
return '<Coerce %s>' % self.arg
def __coerce__(self, other):
if isinstance(other, Coerce):
return self.arg, other.arg
else:
return self.arg, other
class Cmp:
def __init__(self,arg):
self.arg = arg
def __repr__(self):
return '<Cmp %s>' % self.arg
def __cmp__(self, other):
return cmp(self.arg, other)
class ComparisonTest(unittest.TestCase):
set1 = [2, 2.0, 2L, 2+0j, Coerce(2), Cmp(2.0)]
set2 = [[1], (3,), None, Empty()]
candidates = set1 + set2
def test_comparisons(self):
for a in self.candidates:
for b in self.candidates:
if ((a in self.set1) and (b in self.set1)) or a is b:
self.assertEqual(a, b)
else:
self.assertNotEqual(a, b)
def test_id_comparisons(self):
# Ensure default comparison compares id() of args
L = []
for i in range(10):
L.insert(len(L)//2, Empty())
for a in L:
for b in L:
self.assertEqual(cmp(a, b), cmp(id(a), id(b)),
'a=%r, b=%r' % (a, b))
def test_main():
test_support.run_unittest(ComparisonTest)
if __name__ == '__main__':
test_main()