Basisimplementierung Songlist

src/app/songs/services/song-data.service.spec.ts

@@ -0,0 +1,41 @@
+import {async, TestBed} from '@angular/core/testing';
+
+import {SongDataService} from './song-data.service';
+import {AngularFirestore} from "@angular/fire/firestore";
+import {of} from "rxjs";
+
+describe('SongDataService', () => {
+
+  const songs = [
+    {title: 'title1'}
+  ];
+
+  const angularFirestoreCollection = {
+    valueChanges: () => of(songs)
+  };
+
+  const mockAngularFirestore = {
+    collection: path => angularFirestoreCollection
+  };
+
+  beforeEach(() => TestBed.configureTestingModule({
+    providers: [
+      {provide: AngularFirestore, useValue: mockAngularFirestore}
+    ]
+  }));
+
+  it('should be created', () => {
+    const service: SongDataService = TestBed.get(SongDataService);
+    expect(service).toBeTruthy();
+  });
+
+  it('should list songs', async(() => {
+    const service: SongDataService = TestBed.get(SongDataService);
+    service.list().subscribe(songs => {
+        expect(songs).toEqual(<any>[
+          {title: 'title1'}
+        ]);
+      }
+    )
+  }));
+});