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app/app.component.spec.ts

@@ -0,0 +1,33 @@
+import { AppComponent } from './app.component';
+
+import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+import { By }           from '@angular/platform-browser';
+import { DebugElement } from '@angular/core';
+
+describe('AppComponent', function () {
+  let de: DebugElement;
+  let comp: AppComponent;
+  let fixture: ComponentFixture<AppComponent>;
+
+  beforeEach(async(() => {
+    TestBed.configureTestingModule({
+      declarations: [ AppComponent ]
+    })
+    .compileComponents();
+  }));
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(AppComponent);
+    comp = fixture.componentInstance;
+    de = fixture.debugElement.query(By.css('h1'));
+  });
+
+  it('should create component', () => expect(comp).toBeDefined() );
+
+  it('should have expected <h1> text', () => {
+    fixture.detectChanges();
+    const h1 = de.nativeElement;
+    expect(h1.innerText).toMatch(/angular/i,
+      '<h1> should say something about "Angular"');
+  });
+});