begin fix unit test related to angular/angular-cli#2206 probably not the right solution...

migrate to yarn

Author: heralight

package.json

@@ -5,8 +5,8 @@
   "scripts": {
     "lint": "eslint .",
     "start": "node .",
-    "posttest": "npm run lint && nsp check",
-    "setup": "npm install && cd webapp && npm install"
+    "posttest": "yarn lint && nsp check",
+    "setup": "yarn install && cd webapp && yarn install"
   },
   "dependencies": {
     "@mean-expert/loopback-component-realtime": "^1.0.0-beta.8",

webapp/src/app/app.component.spec.ts

@@ -2,13 +2,15 @@
 
 import { TestBed, async } from '@angular/core/testing';
 import { AppComponent } from './app.component';
+import { FormsModule } from '@angular/forms';
 
 describe('App: Webapp', () => {
   beforeEach(() => {
     TestBed.configureTestingModule({
       declarations: [
         AppComponent
       ],
+      imports: [ FormsModule ]
     });
   });
 

webapp/src/typings.d.ts

@@ -3,3 +3,7 @@
 
 declare var System: any;
 declare var require: any;
+declare var describe: any;
+declare var expect: any;
+declare var beforeEach: any;
+declare var it: any;