Update app.component.spec.ts to match standalone component

Author: AlisherAmonulloev

Angular/src/app/app.component.spec.ts

@@ -1,14 +1,10 @@
 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();
@@ -20,16 +16,29 @@ describe('AppComponent', () => {
     expect(app).toBeTruthy();
   });
 
-  it('should have as title \'angular-test\'', () => {
+  it('should have as title \'Angular\'', () => {
     const fixture = TestBed.createComponent(AppComponent);
     const app = fixture.componentInstance;
-    expect(app.title).toEqual('angular-test');
+    expect(app.title).toEqual('Angular');
   });
 
-  it('should render title', () => {
+  it('should render the dx-button', () => {
     const fixture = TestBed.createComponent(AppComponent);
     fixture.detectChanges();
     const compiled = fixture.nativeElement as HTMLElement;
-    expect(compiled.querySelector('.content span')?.textContent).toContain('angular-test app is running!');
+    expect(compiled.querySelector('dx-button')).toBeTruthy();
+  });
+
+  it('should increment the counter and update the button text on click', () => {
+    const fixture = TestBed.createComponent(AppComponent);
+    const app = fixture.componentInstance;
+
+    expect(app.counter).toEqual(0);
+    expect(app.buttonText).toEqual('Click count: 0');
+
+    app.onClick({} as never);
+
+    expect(app.counter).toEqual(1);
+    expect(app.buttonText).toEqual('Click count: 1');
   });
 });