add initial test for search plugin

Signed-off-by: Emma Indal <emma.indahl@gmail.com>

plugins/search-backend/src/alpha.test.ts

@@ -0,0 +1,31 @@
+/*
+ * Copyright 2023 The Backstage Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { startTestBackend } from '@backstage/backend-test-utils';
+import request from 'supertest';
+import { searchPlugin } from './alpha';
+
+describe('searchPlugin', () => {
+  it('should serve search results on query endpoint', async () => {
+    const { server } = await startTestBackend({
+      features: [searchPlugin()],
+    });
+
+    const response = await request(server).get('/api/search/query');
+    expect(response.status).toBe(200);
+    expect(response.body).toEqual({ numberOfResults: 0, results: [] });
+  });
+});