Fix unittest.mock._Call: don't ignore name

Issue #28961: Fix unittest.mock._Call helper: don't ignore the name parameter
anymore.

Patch written by Jiajun Huang.

Lib/unittest/mock.py

@@ -1961,9 +1961,8 @@ class _Call(tuple):
 
     If the _Call has no name then it will match any name.
     """
-    def __new__(cls, value=(), name=None, parent=None, two=False,
+    def __new__(cls, value=(), name='', parent=None, two=False,
                 from_kall=True):
-        name = ''
         args = ()
         kwargs = {}
         _len = len(value)

Lib/unittest/test/testmock/testhelpers.py

@@ -306,6 +306,20 @@ class CallTest(unittest.TestCase):
         other_args = _Call(((1, 2), {'a': 3}))
         self.assertEqual(args, other_args)
 
+    def test_call_with_name(self):
+        self.assertEqual(
+            'foo',
+            _Call((), 'foo')[0],
+        )
+        self.assertEqual(
+            '',
+            _Call((('bar', 'barz'), ), )[0]
+        )
+        self.assertEqual(
+            '',
+            _Call((('bar', 'barz'), {'hello': 'world'}), )[0]
+        )
+
 
 class SpecSignatureTest(unittest.TestCase):
 

Misc/NEWS

@@ -42,6 +42,9 @@ Core and Builtins
 Library
 -------
 
+- Issue #28961: Fix unittest.mock._Call helper: don't ignore the name parameter
+  anymore. Patch written by Jiajun Huang.
+
 - Issue #15812: inspect.getframeinfo() now correctly shows the first line of
   a context.  Patch by Sam Breese.