[2.0.x] Fixed #28702 -- Made query lookups for CIText fields use citext.

Backport of f0a68c25118786d47041d0a435b2afa953be3c86 from master

1 files changed, 4 insertions, 0 deletions

diff --git a/tests/backends/postgresql/tests.py b/tests/backends/postgresql/tests.py
index 140fbbc444..db3be9bde7 100644
--- a/tests/backends/postgresql/tests.py
+++ b/tests/backends/postgresql/tests.py
@@ -138,6 +138,10 @@ class Tests(TestCase):
         for lookup in lookups:
             with self.subTest(lookup=lookup):
                 self.assertIn('::text', do.lookup_cast(lookup))
+        for lookup in lookups:
+            for field_type in ('CICharField', 'CIEmailField', 'CITextField'):
+                with self.subTest(lookup=lookup, field_type=field_type):
+                    self.assertIn('::citext', do.lookup_cast(lookup, internal_type=field_type))
 
     def test_correct_extraction_psycopg2_version(self):
         from django.db.backends.postgresql.base import psycopg2_version