fixed test cases by adding the correct imports

Author: janniclas

client/src/app/dashboard/graph-view/graph-view.service.spec.ts

@@ -1,9 +1,12 @@
 import {TestBed} from '@angular/core/testing';
-
+import { HttpClientTestingModule } from '@angular/common/http/testing';
 import {GraphViewService} from './graph-view.service';
 
 describe('GraphViewService', () => {
-  beforeEach(() => TestBed.configureTestingModule({}));
+  beforeEach(() => TestBed.configureTestingModule({
+    imports: [HttpClientTestingModule],
+    providers: [GraphViewService]
+  }));
 
   it('should be created', () => {
     const service: GraphViewService = TestBed.get(GraphViewService);

client/src/app/dashboard/graph-view/graph-view/graph-view.component.spec.ts

@@ -1,14 +1,18 @@
 import {async, ComponentFixture, TestBed} from '@angular/core/testing';
 
 import {GraphViewComponent} from './graph-view.component';
+import { ApiModule } from 'src/app/api/api.module';
+import { HttpClientModule } from '@angular/common/http';
+import { HttpClientTestingModule } from '@angular/common/http/testing';
 
 describe('GraphViewComponent', () => {
   let component: GraphViewComponent;
   let fixture: ComponentFixture<GraphViewComponent>;
 
   beforeEach(async(() => {
     TestBed.configureTestingModule({
-      declarations: [GraphViewComponent]
+      declarations: [GraphViewComponent],
+      imports: [HttpClientTestingModule, HttpClientModule, ApiModule]
     })
       .compileComponents();
   }));