add unit tests

src/app/modules/songs/song/edit/edit.service.spec.ts

@@ -1,12 +1,74 @@
 import {TestBed} from '@angular/core/testing';
-
 import {EditService} from './edit.service';
 
 describe('EditService', () => {
-  beforeEach(() => void TestBed.configureTestingModule({}));
+  let service: EditService;
+
+  beforeEach(() => {
+    void TestBed.configureTestingModule({});
+    service = TestBed.inject(EditService);
+  });
 
   it('should be created', () => {
-    const service: EditService = TestBed.inject(EditService);
-    void expect(service).toBeTruthy();
+    expect(service).toBeTruthy();
+  });
+
+  it('should create a form with all editable song fields populated', () => {
+    const form = service.createSongForm({
+      text: 'Line 1',
+      title: 'Amazing Grace',
+      comment: 'Comment',
+      flags: 'fast',
+      key: 'G',
+      tempo: 90,
+      type: 'Praise',
+      status: 'final',
+      legalType: 'allowed',
+      legalOwner: 'CCLI',
+      legalOwnerId: '123',
+      artist: 'Artist',
+      label: 'Label',
+      termsOfUse: 'Use it',
+      origin: 'Origin',
+    } as never);
+
+    expect(form.getRawValue()).toEqual({
+      text: 'Line 1',
+      title: 'Amazing Grace',
+      comment: 'Comment',
+      flags: 'fast',
+      key: 'G',
+      tempo: 90,
+      type: 'Praise',
+      status: 'final',
+      legalType: 'allowed',
+      legalOwner: 'CCLI',
+      legalOwnerId: '123',
+      artist: 'Artist',
+      label: 'Label',
+      termsOfUse: 'Use it',
+      origin: 'Origin',
+    });
+  });
+
+  it('should default the status control to draft when the song has no status', () => {
+    const form = service.createSongForm({
+      text: '',
+      title: 'Untitled',
+      comment: '',
+      flags: '',
+      key: 'C',
+      tempo: 80,
+      type: 'Misc',
+      legalType: 'open',
+      legalOwner: 'other',
+      legalOwnerId: '',
+      artist: '',
+      label: '',
+      termsOfUse: '',
+      origin: '',
+    } as never);
+
+    expect(form.get('status')?.value).toBe('draft');
   });
 });