add unit tests

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

@@ -1,22 +1,54 @@
 import {TestBed} from '@angular/core/testing';
 import {Storage} from '@angular/fire/storage';
-
-import {UploadService} from './upload.service';
 import {FileDataService} from './file-data.service';
+import {Upload} from './upload';
+import {UploadService} from './upload.service';
 
-describe('UploadServiceService', () => {
-  beforeEach(
-    () =>
-      void TestBed.configureTestingModule({
-        providers: [
-          {provide: Storage, useValue: {}},
-          {provide: FileDataService, useValue: {set: () => Promise.resolve('')}},
-        ],
-      })
-  );
+describe('UploadService', () => {
+  let service: UploadService;
+  let fileDataServiceSpy: jasmine.SpyObj<FileDataService>;
+
+  beforeEach(() => {
+    fileDataServiceSpy = jasmine.createSpyObj<FileDataService>('FileDataService', ['set']);
+    fileDataServiceSpy.set.and.resolveTo('file-1');
+
+    void TestBed.configureTestingModule({
+      providers: [
+        {provide: Storage, useValue: {app: 'test-storage'}},
+        {provide: FileDataService, useValue: fileDataServiceSpy},
+      ],
+    });
+
+    service = TestBed.inject(UploadService);
+  });
 
   it('should be created', () => {
-    const service: UploadService = TestBed.inject(UploadService);
-    void expect(service).toBeTruthy();
+    expect(service).toBeTruthy();
+  });
+
+  it('should upload the file, update progress and persist file metadata on success', async () => {
+    const task = {
+      on: (event: string, progress: (snapshot: {bytesTransferred: number; totalBytes: number}) => void, error: () => void, success: () => void) => {
+        progress({bytesTransferred: 50, totalBytes: 100});
+        success();
+      },
+    };
+    const uploadSpy = spyOn<any>(service, 'startUpload').and.returnValue(task as never);
+    const upload = new Upload(new File(['content'], 'test.pdf', {type: 'application/pdf'}));
+
+    service.pushUpload('song-1', upload);
+    await Promise.resolve();
+
+    expect(uploadSpy).toHaveBeenCalledWith('/attachments/song-1/test.pdf', upload.file);
+    expect(upload.progress).toBe(50);
+    expect(upload.path).toBe('/attachments/song-1');
+    expect(fileDataServiceSpy.set).toHaveBeenCalledWith(
+      'song-1',
+      jasmine.objectContaining({
+        name: 'test.pdf',
+        path: '/attachments/song-1',
+        createdAt: jasmine.any(Date),
+      })
+    );
   });
 });