[3.12] gh-111019: Align expected and actual titles in test output (GH-111020) (#111024)

gh-111019: Align expected and actual titles in test output (GH-111020)

Align expected and actual titles in output from
assert_has_calls/assert_called_with for greater readability
(cherry picked from commit 77dbd956090aac66e264d9d640f6adb6b0930b87)

Co-authored-by: James <morisja@gmail.com>

2 files changed, 10 insertions, 10 deletions

diff --git a/Lib/test/test_unittest/testmock/testmock.py b/Lib/test/test_unittest/testmock/testmock.py
index d1cae47..34d76ba 100644
--- a/Lib/test/test_unittest/testmock/testmock.py
+++ b/Lib/test/test_unittest/testmock/testmock.py
@@ -1039,7 +1039,7 @@ class MockTest(unittest.TestCase):
 
         actual = 'not called.'
         expected = "mock(1, '2', 3, bar='foo')"
-        message = 'expected call not found.\nExpected: %s\nActual: %s'
+        message = 'expected call not found.\nExpected: %s\n  Actual: %s'
         self.assertRaisesWithMsg(
             AssertionError, message % (expected, actual),
             mock.assert_called_with, 1, '2', 3, bar='foo'
@@ -1054,7 +1054,7 @@ class MockTest(unittest.TestCase):
         for meth in asserters:
             actual = "foo(1, '2', 3, foo='foo')"
             expected = "foo(1, '2', 3, bar='foo')"
-            message = 'expected call not found.\nExpected: %s\nActual: %s'
+            message = 'expected call not found.\nExpected: %s\n  Actual: %s'
             self.assertRaisesWithMsg(
                 AssertionError, message % (expected, actual),
                 meth, 1, '2', 3, bar='foo'
@@ -1064,7 +1064,7 @@ class MockTest(unittest.TestCase):
         for meth in asserters:
             actual = "foo(1, '2', 3, foo='foo')"
             expected = "foo(bar='foo')"
-            message = 'expected call not found.\nExpected: %s\nActual: %s'
+            message = 'expected call not found.\nExpected: %s\n  Actual: %s'
             self.assertRaisesWithMsg(
                 AssertionError, message % (expected, actual),
                 meth, bar='foo'
@@ -1074,7 +1074,7 @@ class MockTest(unittest.TestCase):
         for meth in asserters:
             actual = "foo(1, '2', 3, foo='foo')"
             expected = "foo(1, 2, 3)"
-            message = 'expected call not found.\nExpected: %s\nActual: %s'
+            message = 'expected call not found.\nExpected: %s\n  Actual: %s'
             self.assertRaisesWithMsg(
                 AssertionError, message % (expected, actual),
                 meth, 1, 2, 3
@@ -1084,7 +1084,7 @@ class MockTest(unittest.TestCase):
         for meth in asserters:
             actual = "foo(1, '2', 3, foo='foo')"
             expected = "foo()"
-            message = 'expected call not found.\nExpected: %s\nActual: %s'
+            message = 'expected call not found.\nExpected: %s\n  Actual: %s'
             self.assertRaisesWithMsg(
                 AssertionError, message % (expected, actual), meth
             )
@@ -1533,7 +1533,7 @@ class MockTest(unittest.TestCase):
                 '^{}$'.format(
                     re.escape('Calls not found.\n'
                               'Expected: [call()]\n'
-                              'Actual: [call(1)]'))) as cm:
+                              '  Actual: [call(1)]'))) as cm:
             mock.assert_has_calls([call()])
         self.assertIsNone(cm.exception.__cause__)
 
@@ -1545,7 +1545,7 @@ class MockTest(unittest.TestCase):
                         'Error processing expected calls.\n'
                         "Errors: [None, TypeError('too many positional arguments')]\n"
                         "Expected: [call(), call(1, 2)]\n"
-                        'Actual: [call(1)]'))) as cm:
+                        '  Actual: [call(1)]'))) as cm:
             mock.assert_has_calls([call(), call(1, 2)])
         self.assertIsInstance(cm.exception.__cause__, TypeError)
 
diff --git a/Lib/unittest/mock.py b/Lib/unittest/mock.py
index 7ca0857..30e8f15 100644
--- a/Lib/unittest/mock.py
+++ b/Lib/unittest/mock.py
@@ -827,7 +827,7 @@ class NonCallableMock(Base):
 
 
     def _format_mock_failure_message(self, args, kwargs, action='call'):
-        message = 'expected %s not found.\nExpected: %s\nActual: %s'
+        message = 'expected %s not found.\nExpected: %s\n  Actual: %s'
         expected_string = self._format_mock_call_signature(args, kwargs)
         call_args = self.call_args
         actual_string = self._format_mock_call_signature(*call_args)
@@ -930,7 +930,7 @@ class NonCallableMock(Base):
         if self.call_args is None:
             expected = self._format_mock_call_signature(args, kwargs)
             actual = 'not called.'
-            error_message = ('expected call not found.\nExpected: %s\nActual: %s'
+            error_message = ('expected call not found.\nExpected: %s\n  Actual: %s'
                     % (expected, actual))
             raise AssertionError(error_message)
 
@@ -981,7 +981,7 @@ class NonCallableMock(Base):
                 raise AssertionError(
                     f'{problem}\n'
                     f'Expected: {_CallList(calls)}'
-                    f'{self._calls_repr(prefix="Actual").rstrip(".")}'
+                    f'{self._calls_repr(prefix="  Actual").rstrip(".")}'
                 ) from cause
             return