migrate firebase storage

src/app/modules/songs/services/file.service.spec.ts

@@ -1,12 +1,19 @@
 import {TestBed} from '@angular/core/testing';
+import {Storage} from '@angular/fire/storage';
 
 import {FileService} from './file.service';
+import {FileDataService} from './file-data.service';
 
 describe('FileService', () => {
   let service: FileService;
 
   beforeEach(() => {
-    void TestBed.configureTestingModule({});
+    void TestBed.configureTestingModule({
+      providers: [
+        {provide: Storage, useValue: {}},
+        {provide: FileDataService, useValue: {delete: () => Promise.resolve()}},
+      ],
+    });
     service = TestBed.inject(FileService);
   });