Add async/await

public/app/core/specs/backend_srv.jest.ts

@@ -3,10 +3,9 @@ jest.mock('app/core/store');
 
 describe('backend_srv', function() {
   let _httpBackend = options => {
-    if (options.method === 'GET' && options.url === 'gateway-error') {
+    console.log(options);
+    if (options.url === 'gateway-error') {
       return Promise.reject({ status: 502 });
-    } else if (options.method === 'POST') {
-      // return Promise.resolve({});
     }
     return Promise.resolve({});
   };
@@ -22,17 +21,14 @@ describe('backend_srv', function() {
   //     })
   //   );
 
-  describe('when handling errors', function() {
-    it('should return the http status code', function(done) {
+  describe('when handling errors', () => {
+    it('should return the http status code', async () => {
       //   _httpBackend.whenGET('gateway-error').respond(502);
-      _backendSrv
-        .datasourceRequest({
+      let res = await _backendSrv.datasourceRequest({
         url: 'gateway-error',
-        })
-        .catch(function(err) {
-          expect(err.status).toBe(502);
-          done();
       });
+      console.log(res);
+      expect(res.status).toBe(502);
       //   _httpBackend.flush();
     });
   });