adding test for conditional env checking

src/app/app-routing.module.spec.ts

@@ -0,0 +1,23 @@
+import { TestBed, waitForAsync } from '@angular/core/testing';
+import { RouterTestingModule } from '@angular/router/testing';
+import { AppRoutingModule } from './app-routing.module';
+
+describe('AppRoutingModule', () => {
+  beforeEach(waitForAsync(() => {
+    TestBed.configureTestingModule({
+      imports: [
+        RouterTestingModule
+      ],
+      declarations: [
+        AppRoutingModule
+      ],
+    }).compileComponents();
+  }));
+
+  it('should create routes when not legacy', () => {
+    const fixture = TestBed.createComponent(AppRoutingModule);
+    const app = fixture.componentInstance;
+    expect(app.routes).toBeTruthy();
+  });
+
+});

src/app/app-routing.module.ts

@@ -51,4 +51,6 @@ if (isNotLegacy) {
   imports: [RouterModule.forRoot(routes)],
   exports: [RouterModule],
 })
-export class AppRoutingModule { }
+export class AppRoutingModule { 
+  routes = routes;
+}