added one test on jest

client/setup-jest.ts

@@ -1,3 +1,2 @@
-
-import 'jest-preset-angular/setup-jest';
-
+import { setupZoneTestEnv } from 'jest-preset-angular/setup-env/zone';
+setupZoneTestEnv();

client/src/app/app.component.spec.ts

@@ -0,0 +1,18 @@
+import { TestBed } from '@angular/core/testing';
+import { RouterTestingModule } from '@angular/router/testing';
+import { AppComponent } from './app.component';
+
+describe('AppComponent', () => {
+	beforeEach(async () => {
+		await TestBed.configureTestingModule({
+			imports: [RouterTestingModule],
+			declarations: [AppComponent]
+		}).compileComponents();
+	});
+
+	it('should create the component', () => {
+		const fixture = TestBed.createComponent(AppComponent);
+		const app = fixture.componentInstance;
+		expect(app).toBeTruthy();
+	});
+});