create shared service

my-workspace/projects/sae-lib/services/shared-service.spec.ts

@@ -0,0 +1,16 @@
+import { TestBed } from '@angular/core/testing';
+
+import { SharedService } from './shared-service';
+
+describe('SharedService', () => {
+  let service: SharedService;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({});
+    service = TestBed.inject(SharedService);
+  });
+
+  it('should be created', () => {
+    expect(service).toBeTruthy();
+  });
+});

my-workspace/projects/sae-lib/services/shared-service.ts

@@ -0,0 +1,8 @@
+import { Injectable } from '@angular/core';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class SharedService {
+  
+}