fix mocking

Author: itsmylife

src/metric_find_query.test.ts

@@ -1,14 +1,15 @@
 import 'whatwg-fetch'; // fetch polyfill needed backendSrv
 import { DataSourceInstanceSettings, TimeRange, toUtc } from '@grafana/data';
-import { FetchResponse } from '@grafana/runtime';
-import { backendSrv } from 'app/core/services/backend_srv'; // will use the version in __mocks__
-import { TemplateSrv } from 'app/features/templating/template_srv';
+import { FetchResponse, getBackendSrv, TemplateSrv } from '@grafana/runtime';
 import { of } from 'rxjs';
 
 import { PrometheusDatasource } from './datasource';
 import PrometheusMetricFindQuery from './metric_find_query';
 import { PromApplication, PromOptions } from './types';
 
+// This should be mocked like here https://github.com/grafana/grafana/blob/main/public/app/plugins/datasource/influxdb/mocks.ts
+const backendSrv = getBackendSrv();
+
 jest.mock('@grafana/runtime', () => ({
   ...jest.requireActual('@grafana/runtime'),
   getBackendSrv: () => backendSrv,