test(search-elasticsearch): add test for elastic provider with authProvider

Signed-off-by: nojaf <florian.verdonck@outlook.com>

plugins/search-backend-module-elasticsearch/src/engines/ElasticSearchSearchEngine.test.ts

@@ -1048,6 +1048,36 @@ describe('ElasticSearchSearchEngine', () => {
       expect(engine).toBeDefined();
     });
 
+    it('should accept an authProvider with elastic provider', async () => {
+      // cloudId format: <name>:<base64-encoded-data>
+      // The base64 part decodes to: <es-hostname>$<kibana-hostname>
+      const cloudId =
+        'test:dXMtY2VudHJhbDEuZ2NwLmNsb3VkLmVzLmlvJGFiY2QkZWZnaA==';
+      const config = new ConfigReader({
+        search: {
+          elasticsearch: {
+            provider: 'elastic',
+            cloudId,
+            // No auth config - using authProvider instead
+          },
+        },
+      });
+
+      const authProvider = {
+        getAuthHeaders: jest
+          .fn()
+          .mockResolvedValue({ Authorization: 'Bearer test-token' }),
+      };
+
+      const engine = await ElasticSearchSearchEngine.fromConfig({
+        logger: mockServices.logger.mock(),
+        config,
+        authProvider,
+      });
+
+      expect(engine).toBeDefined();
+    });
+
     it('should throw error when using authProvider with aws provider', async () => {
       const config = new ConfigReader({
         search: {