Refs #33348 -- Removed support for passing errors=None to SimpleTestCase.assertFormError()/assertFormsetErrors().

Per deprecation timeline.

django/test/testcases.py

@@ -724,15 +724,6 @@ class SimpleTestCase(unittest.TestCase):
 
         You can pass field=None to check the form's non-field errors.
         """
-        if errors is None:
-            warnings.warn(
-                "Passing errors=None to assertFormError() is deprecated, use "
-                "errors=[] instead.",
-                RemovedInDjango50Warning,
-                stacklevel=2,
-            )
-            errors = []
-
         if msg_prefix:
             msg_prefix += ": "
         errors = to_list(errors)
@@ -760,15 +751,6 @@ class SimpleTestCase(unittest.TestCase):
 
         Other parameters are the same as assertFormError().
         """
-        if errors is None:
-            warnings.warn(
-                "Passing errors=None to assertFormSetError() is deprecated, "
-                "use errors=[] instead.",
-                RemovedInDjango50Warning,
-                stacklevel=2,
-            )
-            errors = []
-
         if form_index is None and field is not None:
             raise ValueError("You must use field=None with form_index=None.")
 

docs/releases/5.0.txt

@@ -314,3 +314,6 @@ to remove usage of these features.
 
 * The ``opclasses`` argument of
   ``django.contrib.postgres.constraints.ExclusionConstraint`` is removed.
+
+* The undocumented ability to pass ``errors=None`` to
+  ``SimpleTestCase.assertFormError()`` and ``assertFormsetError()`` is removed.

tests/test_utils/tests.py

@@ -1769,23 +1769,6 @@ class AssertFormErrorDeprecationTests(SimpleTestCase):
     signature.
     """
 
-    @ignore_warnings(category=RemovedInDjango50Warning)
-    def test_assert_form_error_errors_none(self):
-        msg = (
-            "The errors of field 'field' on form <TestForm bound=True, valid=False, "
-            "fields=(field)> don't match."
-        )
-        with self.assertRaisesMessage(AssertionError, msg):
-            self.assertFormError(TestForm.invalid(), "field", None)
-
-    def test_assert_form_error_errors_none_warning(self):
-        msg = (
-            "Passing errors=None to assertFormError() is deprecated, use "
-            "errors=[] instead."
-        )
-        with self.assertWarnsMessage(RemovedInDjango50Warning, msg):
-            self.assertFormError(TestForm.valid(), "field", None)
-
     def _assert_form_error_old_api_cases(self, form, field, errors, msg_prefix):
         response = mock.Mock(context=[{"form": TestForm.invalid()}])
         return (
@@ -1852,23 +1835,6 @@ class AssertFormErrorDeprecationTests(SimpleTestCase):
                 with self.assertRaises(AssertionError):
                     self.assertFormError(*args, **kwargs)
 
-    @ignore_warnings(category=RemovedInDjango50Warning)
-    def test_assert_formset_error_errors_none(self):
-        msg = (
-            "The errors of field 'field' on form 0 of formset <TestFormset: bound=True "
-            "valid=False total_forms=1> don't match."
-        )
-        with self.assertRaisesMessage(AssertionError, msg):
-            self.assertFormSetError(TestFormset.invalid(), 0, "field", None)
-
-    def test_assert_formset_error_errors_none_warning(self):
-        msg = (
-            "Passing errors=None to assertFormSetError() is deprecated, use "
-            "errors=[] instead."
-        )
-        with self.assertWarnsMessage(RemovedInDjango50Warning, msg):
-            self.assertFormSetError(TestFormset.valid(), 0, "field", None)
-
     def _assert_formset_error_old_api_cases(
         self, formset, form_index, field, errors, msg_prefix
     ):