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import unittest
from test import support
class Empty:
def __repr__(self):
return '<Empty>'
class Cmp:
def __init__(self,arg):
self.arg = arg
def __repr__(self):
return '<Cmp %s>' % self.arg
def __eq__(self, other):
return self.arg == other
class Anything:
def __eq__(self, other):
return True
def __ne__(self, other):
return False
class ComparisonTest(unittest.TestCase):
set1 = [2, 2.0, 2, 2+0j, 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(a == b, id(a) == id(b),
'a=%r, b=%r' % (a, b))
def test_ne_defaults_to_not_eq(self):
a = Cmp(1)
b = Cmp(1)
self.assertTrue(a == b)
self.assertFalse(a != b)
def test_issue_1393(self):
x = lambda: None
self.assertEqual(x, Anything())
self.assertEqual(Anything(), x)
y = object()
self.assertEqual(y, Anything())
self.assertEqual(Anything(), y)
def test_main():
support.run_unittest(ComparisonTest)
if __name__ == '__main__':
test_main()
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