Ticket #28391: 28391.diff

tests/db_functions/test_cast.py

@@ +1 @@
+from unittest import mock
+
 from django.db import models
 from django.db.models.expressions import Value
 from django.db.models.functions import Cast
@@ -19 +21 @@
         numbers = Author.objects.annotate(cast_string=Cast('age', models.CharField(max_length=255)),)
         self.assertEqual(numbers.get().cast_string, '1')
 
+    @mock.patch('sys.stderr')
+    def test_cast_to_char_field_with_max_length(self, mocked_stdout):
+        names = Author.objects.annotate(cast_string=Cast('name', models.CharField(max_length=1)))
+        self.assertEqual(names.get().cast_string, 'B')
+
     def test_cast_to_integer(self):
         for field_class in (
             models.IntegerField,