Add tests for functools.total_ordering.
diff --git a/Doc/reference/datamodel.rst b/Doc/reference/datamodel.rst
index 2542704..2dcaed2 100644
--- a/Doc/reference/datamodel.rst
+++ b/Doc/reference/datamodel.rst
@@ -1353,8 +1353,7 @@
Arguments to rich comparison methods are never coerced.
To automatically generate ordering operations from a single root operation,
- see the `Total Ordering recipe in the ASPN cookbook
- <http://code.activestate.com/recipes/576529/>`_\.
+ see :func:`functools.total_ordering`.
.. method:: object.__cmp__(self, other)
diff --git a/Lib/test/test_functools.py b/Lib/test/test_functools.py
index 44992b8..1629f7c 100644
--- a/Lib/test/test_functools.py
+++ b/Lib/test/test_functools.py
@@ -345,6 +345,75 @@
self.assertEqual(sorted(range(5), key=functools.cmp_to_key(mycmp)),
[4, 3, 2, 1, 0])
+class TestTotalOrdering(unittest.TestCase):
+
+ def test_total_ordering_lt(self):
+ @functools.total_ordering
+ class A:
+ def __init__(self, value):
+ self.value = value
+ def __lt__(self, other):
+ return self.value < other.value
+ self.assert_(A(1) < A(2))
+ self.assert_(A(2) > A(1))
+ self.assert_(A(1) <= A(2))
+ self.assert_(A(2) >= A(1))
+ self.assert_(A(2) <= A(2))
+ self.assert_(A(2) >= A(2))
+
+ def test_total_ordering_le(self):
+ @functools.total_ordering
+ class A:
+ def __init__(self, value):
+ self.value = value
+ def __le__(self, other):
+ return self.value <= other.value
+ self.assert_(A(1) < A(2))
+ self.assert_(A(2) > A(1))
+ self.assert_(A(1) <= A(2))
+ self.assert_(A(2) >= A(1))
+ self.assert_(A(2) <= A(2))
+ self.assert_(A(2) >= A(2))
+
+ def test_total_ordering_gt(self):
+ @functools.total_ordering
+ class A:
+ def __init__(self, value):
+ self.value = value
+ def __gt__(self, other):
+ return self.value > other.value
+ self.assert_(A(1) < A(2))
+ self.assert_(A(2) > A(1))
+ self.assert_(A(1) <= A(2))
+ self.assert_(A(2) >= A(1))
+ self.assert_(A(2) <= A(2))
+ self.assert_(A(2) >= A(2))
+
+ def test_total_ordering_ge(self):
+ @functools.total_ordering
+ class A:
+ def __init__(self, value):
+ self.value = value
+ def __ge__(self, other):
+ return self.value >= other.value
+ self.assert_(A(1) < A(2))
+ self.assert_(A(2) > A(1))
+ self.assert_(A(1) <= A(2))
+ self.assert_(A(2) >= A(1))
+ self.assert_(A(2) <= A(2))
+ self.assert_(A(2) >= A(2))
+
+ def test_total_ordering_no_overwrite(self):
+ # new methods should not overwrite existing
+ @functools.total_ordering
+ class A(int):
+ pass
+ self.assert_(A(1) < A(2))
+ self.assert_(A(2) > A(1))
+ self.assert_(A(1) <= A(2))
+ self.assert_(A(2) >= A(1))
+ self.assert_(A(2) <= A(2))
+ self.assert_(A(2) >= A(2))
def test_main(verbose=None):
test_classes = (