Added new test case for bulk delete with single item

Signed-off-by: Harshil Jani <harshiljani2002@gmail.com>

test_opensearchpy/test_server/test_helpers/test_actions.py

@@ -231,6 +231,26 @@ def streaming_bulk() -> Any:
 
 
 class TestBulk(OpenSearchTestCase):
+    def test_bulk_delete_with_single_item(self) -> None:
+        docs = [{"answer": 42, "_id": 1}]
+        success, failed = helpers.bulk(
+            self.client, docs, index="test-index", refresh=True
+        )
+
+        self.assertEqual(1, success)
+        self.assertFalse(failed)
+        self.assertEqual(1, self.client.count(index="test-index")["count"])
+        self.assertEqual(
+            {"answer": 42}, self.client.get(index="test-index", id=1)["_source"]
+        )
+
+        docs = [{"delete": {"_index": "test-index", "_id": 1}}]           
+        success, failed = helpers.bulk(self.client, docs)
+        self.assertEqual(1,success)
+        self.assertFalse(failed)
+        self.assertEqual(0, self.client.count(index="test-index")["count"])
+
+
     def test_bulk_works_with_single_item(self) -> None:
         docs = [{"answer": 42, "_id": 1}]
         success, failed = helpers.bulk(