mirror of https://github.com/python/cpython
Add tests for functools.total_ordering.
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@ -1353,8 +1353,7 @@ Basic customization
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Arguments to rich comparison methods are never coerced.
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To automatically generate ordering operations from a single root operation,
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see the `Total Ordering recipe in the ASPN cookbook
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<http://code.activestate.com/recipes/576529/>`_\.
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see :func:`functools.total_ordering`.
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.. method:: object.__cmp__(self, other)
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@ -345,6 +345,75 @@ class TestCmpToKey(unittest.TestCase):
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self.assertEqual(sorted(range(5), key=functools.cmp_to_key(mycmp)),
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[4, 3, 2, 1, 0])
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class TestTotalOrdering(unittest.TestCase):
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def test_total_ordering_lt(self):
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@functools.total_ordering
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class A:
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def __init__(self, value):
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self.value = value
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def __lt__(self, other):
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return self.value < other.value
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self.assert_(A(1) < A(2))
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self.assert_(A(2) > A(1))
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self.assert_(A(1) <= A(2))
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self.assert_(A(2) >= A(1))
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self.assert_(A(2) <= A(2))
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self.assert_(A(2) >= A(2))
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def test_total_ordering_le(self):
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@functools.total_ordering
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class A:
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def __init__(self, value):
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self.value = value
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def __le__(self, other):
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return self.value <= other.value
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self.assert_(A(1) < A(2))
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self.assert_(A(2) > A(1))
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self.assert_(A(1) <= A(2))
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self.assert_(A(2) >= A(1))
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self.assert_(A(2) <= A(2))
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self.assert_(A(2) >= A(2))
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def test_total_ordering_gt(self):
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@functools.total_ordering
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class A:
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def __init__(self, value):
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self.value = value
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def __gt__(self, other):
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return self.value > other.value
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self.assert_(A(1) < A(2))
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self.assert_(A(2) > A(1))
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self.assert_(A(1) <= A(2))
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self.assert_(A(2) >= A(1))
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self.assert_(A(2) <= A(2))
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self.assert_(A(2) >= A(2))
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def test_total_ordering_ge(self):
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@functools.total_ordering
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class A:
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def __init__(self, value):
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self.value = value
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def __ge__(self, other):
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return self.value >= other.value
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self.assert_(A(1) < A(2))
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self.assert_(A(2) > A(1))
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self.assert_(A(1) <= A(2))
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self.assert_(A(2) >= A(1))
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self.assert_(A(2) <= A(2))
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self.assert_(A(2) >= A(2))
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def test_total_ordering_no_overwrite(self):
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# new methods should not overwrite existing
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@functools.total_ordering
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class A(int):
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pass
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self.assert_(A(1) < A(2))
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self.assert_(A(2) > A(1))
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self.assert_(A(1) <= A(2))
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self.assert_(A(2) >= A(1))
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self.assert_(A(2) <= A(2))
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self.assert_(A(2) >= A(2))
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def test_main(verbose=None):
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test_classes = (
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