Issue25347 - Format the error message output of mock's assert_has_calls method.

orsenthil · orsenthil · commit 00bf268b00fd · 2016-01-12T06:18:32.000-08:00
Patch contributed by Robert Zimmerman.
diff --git a/Lib/unittest/mock.py b/Lib/unittest/mock.py
@@ -820,7 +820,7 @@ def assert_has_calls(self, calls, any_order=False):
             if expected not in all_calls:
                 raise AssertionError(
                     'Calls not found.\nExpected: %r\n'
-                    'Actual: %r' % (calls, self.mock_calls)
+                    'Actual: %r' % (_CallList(calls), self.mock_calls)
                 ) from cause
             return
 
