bpo-37555: Add regression tests for mock ANY ordering issues

Add regression tests for whether __eq__ is order agnostic on _Call and _CallList, which is useful for comparisons involving ANY, especially if the ANY comparison is to a class not defaulting __eq__ to NotImplemented.

Co-authored-by: Neal Finne <neal@nealfinne.com>

Lib/unittest/test/testmock/testhelpers.py

@@ -322,6 +322,16 @@ class CallTest(unittest.TestCase):
         kall = call(1).method(2)(3).foo.bar.baz(4)(5).__int__()
         self.assertEqual(kall.call_list(), mock.mock_calls)
 
+    def test_call_list_with_any_comparison_order(self):
+        class Foo:
+            def __eq__(self, other): pass
+            def __ne__(self, other): pass
+
+        mock = MagicMock()
+        mock(Foo())
+
+        self.assertEqual(call(ANY).call_list(), mock.mock_calls)
+        self.assertEqual(mock.mock_calls, call(ANY).call_list())
 
     def test_call_any(self):
         self.assertEqual(call, ANY)
@@ -331,6 +341,16 @@ class CallTest(unittest.TestCase):
         self.assertEqual(m.mock_calls, [ANY])
         self.assertEqual([ANY], m.mock_calls)
 
+    def test_call_any_comparison_order(self):
+        class Foo:
+            def __eq__(self, other): pass
+            def __ne__(self, other): pass
+
+        m = MagicMock()
+        m(Foo())
+
+        self.assertEqual(m.mock_calls[0], call(ANY))
+        self.assertEqual(call(ANY), m.mock_calls[0])
 
     def test_two_args_call(self):
         args = _Call(((1, 2), {'a': 3}), two=True)