fix testing setup

Author: marcelnoehre

package.json

@@ -6,7 +6,10 @@
     "start": "ng serve",
     "build": "ng build",
     "watch": "ng build --watch --configuration development",
-    "test": "ng test"
+    "dev": "ng serve --host 0.0.0.0 --disable-host-check --open",
+    "test": "ng test",
+    "test-headless": "ng test --browsers ChromeHeadless",
+    "ci:test-headless": "ng test --browsers ChromeHeadlessNoSandbox --watch=false"
   },
   "private": true,
   "dependencies": {

src/app/app.component.spec.ts

@@ -1,10 +1,11 @@
 import { TestBed } from '@angular/core/testing';
 import { AppComponent } from './app.component';
+import { HttpClientTestingModule } from '@angular/common/http/testing';
 
 describe('AppComponent', () => {
   beforeEach(async () => {
     await TestBed.configureTestingModule({
-      imports: [AppComponent],
+      imports: [AppComponent, HttpClientTestingModule],
     }).compileComponents();
   });