Add test that ensures hash() of objects defining __cmp__ or __eq__ but
not __hash__ raises TypeError.
diff --git a/Lib/test/test_class.py b/Lib/test/test_class.py
index 3bcbf18..b863152 100644
--- a/Lib/test/test_class.py
+++ b/Lib/test/test_class.py
@@ -1,5 +1,6 @@
"Test the functionality of Python classes implementing operators."
+from test_support import TestFailed
testmeths = [
@@ -216,3 +217,25 @@
testme.spam
testme.eggs = "spam, spam, spam and ham"
del testme.cardinal
+
+
+# Test correct errors from hash() on objects with comparisons but no __hash__
+
+class C0:
+ pass
+
+hash(C0()) # This should work; the next two should raise TypeError
+
+class C1:
+ def __cmp__(self, other): return 0
+
+try: hash(C1())
+except TypeError: pass
+else: raise TestFailed, "hash(C1()) should raise an exception"
+
+class C2:
+ def __eq__(self, other): return 1
+
+try: hash(C2())
+except TypeError: pass
+else: raise TestFailed, "hash(C2()) should raise an exception"