Patch by Keir Mierle so that sets can be compared to other objects that know
how to compare themselves to sets. (Prep work for making dict views more
set-like.)
diff --git a/Lib/test/test_set.py b/Lib/test/test_set.py
index df72fb2..3b8e747 100644
--- a/Lib/test/test_set.py
+++ b/Lib/test/test_set.py
@@ -492,6 +492,42 @@
s = None
self.assertRaises(ReferenceError, str, p)
+ def test_rich_compare(self):
+ class TestRichSetCompare:
+ def __gt__(self, some_set):
+ self.gt_called = True
+ return False
+ def __lt__(self, some_set):
+ self.lt_called = True
+ return False
+ def __ge__(self, some_set):
+ self.ge_called = True
+ return False
+ def __le__(self, some_set):
+ self.le_called = True
+ return False
+
+ # This first tries the bulitin rich set comparison, which doesn't know
+ # how to handle the custom object. Upon returning NotImplemented, the
+ # corresponding comparison on the right object is invoked.
+ myset = {1, 2, 3}
+
+ myobj = TestRichSetCompare()
+ myset < myobj
+ self.assert_(myobj.gt_called)
+
+ myobj = TestRichSetCompare()
+ myset > myobj
+ self.assert_(myobj.lt_called)
+
+ myobj = TestRichSetCompare()
+ myset <= myobj
+ self.assert_(myobj.ge_called)
+
+ myobj = TestRichSetCompare()
+ myset >= myobj
+ self.assert_(myobj.le_called)
+
# C API test only available in a debug build
if hasattr(set, "test_c_api"):
def test_c_api(self):