OZG-6720 adopt test

alfa-client/libs/admin/settings/src/lib/organisationseinheit/organisationseinheit-form-container/organisationseinheit-form/organisationseinheit.formservice.spec.ts

-import { AdminOrganisationsEinheitResource } from '@admin-client/admin-settings';
+import { AdminOrganisationsEinheitResource, AdminOrganisationsEinheitSettings } from '@admin-client/admin-settings';
 import { EMPTY_STRING, StateResource, createStateResource } from '@alfa-client/tech-shared';
 import { Mock, mock, useFromMock } from '@alfa-client/test-utils';
 import { FormBuilder } from '@angular/forms';
@@ -24,6 +24,7 @@ describe('OrganisationsEinheitFormService', () => {
 
   describe('submit', () => {
     const organisationsEinheitResource: AdminOrganisationsEinheitResource = createAdminOrganisationsEinheitResource();
+    const organisationsEinheitSettings: AdminOrganisationsEinheitSettings = { signatur: faker.lorem.word(2) };
 
     beforeEach(() => {
       const stateResource: StateResource<AdminOrganisationsEinheitResource> = createStateResource(organisationsEinheitResource);
@@ -32,12 +33,19 @@ describe('OrganisationsEinheitFormService', () => {
       service.form.setValue({
         [OrganisationsEinheitFormService.ORGANISATIONSEINHEIT_SIGNATUR_FIELD]: organisationsEinheitResource.settings.signatur,
       });
+      service.buildPatchedOrganisationsEinheitSettings = jest.fn().mockReturnValue(organisationsEinheitSettings);
     });
 
     it('should call organisationsEinheitService patch', () => {
       service.submit();
 
-      expect(organisationsEinheitService.patch).toHaveBeenCalledWith(organisationsEinheitResource.settings);
+      expect(organisationsEinheitService.patch).toHaveBeenCalledWith(organisationsEinheitSettings);
+    });
+
+    it('should build patched form value', () => {
+      service.submit();
+
+      expect(service.buildPatchedOrganisationsEinheitSettings).toHaveBeenCalled();
     });
   });