Add simple index operation tests.

Author: WaVEV

tests/indexes_/test_mql.py

@@ -116,3 +116,35 @@ def test_composite_op_index(self):
                         ),
                     )
                 editor.remove_index(index=index, model=Article)
+
+    def test_simple_operations(self):
+        mongo_operators_idx = (
+            ("gt", "$gt"),
+            ("gte", "$gte"),
+            ("lt", "$lt"),
+            ("lte", "$lte"),
+        )
+
+        for op, mongo_operator in mongo_operators_idx:
+            with self.subTest(operator=op), connection.schema_editor() as editor:
+                index = Index(
+                    name="composite_proposition",
+                    fields=["headline"],
+                    condition=Q(**{f"number__{op}": 3}),
+                )
+                index._get_condition_mql(Article, schema_editor=editor)
+                target = {"number": {mongo_operator: 3}}
+                self.assertEqual(
+                    target,
+                    index._get_condition_mql(Article, schema_editor=editor),
+                )
+                editor.add_index(index=index, model=Article)
+                with connection.cursor() as cursor:
+                    self.assertIn(
+                        index.name,
+                        connection.introspection.get_constraints(
+                            cursor=cursor,
+                            table_name=Article._meta.db_table,
+                        ),
+                    )
+                editor.remove_index(index=index, model=Article)