[4.2.x] Moved SearchVectorIndexTests.test_search_vector_index to post…

…gres_tests.test_indexes.

Backport of 02a04ab from main

tests/postgres_tests/test_indexes.py

@@ -539,6 +539,21 @@ def test_tsvector_op_class_gist_index(self):
             editor.remove_index(Scene, index)
         self.assertNotIn(index_name, self.get_constraints(table))
 
+    def test_search_vector(self):
+        """SearchVector generates IMMUTABLE SQL in order to be indexable."""
+        index_name = "test_search_vector"
+        index = Index(SearchVector("id", "scene", config="english"), name=index_name)
+        # Indexed function must be IMMUTABLE.
+        with connection.schema_editor() as editor:
+            editor.add_index(Scene, index)
+        constraints = self.get_constraints(Scene._meta.db_table)
+        self.assertIn(index_name, constraints)
+        self.assertIs(constraints[index_name]["index"], True)
+
+        with connection.schema_editor() as editor:
+            editor.remove_index(Scene, index)
+        self.assertNotIn(index_name, self.get_constraints(Scene._meta.db_table))
+
     def test_hash_index(self):
         # Ensure the table is there and doesn't have an index.
         self.assertNotIn("field", self.get_constraints(CharFieldModel._meta.db_table))

tests/postgres_tests/test_search.py

@@ -5,7 +5,6 @@
 All text copyright Python (Monty) Pictures. Thanks to sacred-texts.com for the
 transcript.
 """
-from django.db import connection
 from django.db.models import F, Value
 
 from . import PostgreSQLSimpleTestCase, PostgreSQLTestCase
@@ -609,26 +608,6 @@ def test_ranking_with_masked_normalization(self):
         )
 
 
-class SearchVectorIndexTests(PostgreSQLTestCase):
-    def test_search_vector_index(self):
-        """SearchVector generates IMMUTABLE SQL in order to be indexable."""
-        # This test should be moved to test_indexes and use a functional
-        # index instead once support lands (see #26167).
-        query = Line.objects.all().query
-        resolved = SearchVector("id", "dialogue", config="english").resolve_expression(
-            query
-        )
-        compiler = query.get_compiler(connection.alias)
-        sql, params = resolved.as_sql(compiler, connection)
-        # Indexed function must be IMMUTABLE.
-        with connection.cursor() as cursor:
-            cursor.execute(
-                "CREATE INDEX search_vector_index ON %s USING GIN (%s)"
-                % (Line._meta.db_table, sql),
-                params,
-            )
-
-
 class SearchQueryTests(PostgreSQLSimpleTestCase):
     def test_str(self):
         tests = (