Stubs out some tests

src/app/home/home.component.spec.ts

@@ -1,19 +1,35 @@
+import {APP_BASE_HREF} from '@angular/common';
+import {HttpClientTestingModule, HttpTestingController} from '@angular/common/http/testing';
 import {async, ComponentFixture, TestBed, waitForAsync} from '@angular/core/testing';
+import {ApiService} from '../services/api.service';
+import {CacheService} from '../services/cache.service';
+import {MockEnvironment} from '../testing/environment.mock';
 
 import { HomeComponent } from './home.component';
 
 describe('HomeComponent', () => {
   let component: HomeComponent;
   let fixture: ComponentFixture<HomeComponent>;
+  let httpMock: HttpTestingController;
 
   beforeEach(waitForAsync(() => {
     TestBed.configureTestingModule({
-      declarations: [ HomeComponent ]
+      declarations: [ HomeComponent ],
+      imports: [
+        HttpClientTestingModule,
+      ],
+      providers: [
+        ApiService,
+        CacheService,
+        {provide: 'APP_ENVIRONMENT', useClass: MockEnvironment},
+        {provide: APP_BASE_HREF, useValue: '/'},
+      ],
     })
     .compileComponents();
   }));
 
   beforeEach(() => {
+    httpMock = TestBed.inject(HttpTestingController);
     fixture = TestBed.createComponent(HomeComponent);
     component = fixture.componentInstance;
     fixture.detectChanges();

src/app/services/cache.service.spec.ts

@@ -0,0 +1,20 @@
+import {TestBed} from '@angular/core/testing';
+import {CacheService} from './cache.service';
+
+describe('CacheService', () => {
+  let service: CacheService;
+
+  beforeEach(() => TestBed.configureTestingModule({
+    providers: [
+      CacheService,
+    ],
+  }));
+
+  beforeEach(() => {
+    service = TestBed.inject(CacheService);
+  });
+
+  it('should be created', () => {
+    expect(service).toBeTruthy();
+  });
+});

src/app/services/settings.service.spec.ts

@@ -0,0 +1,20 @@
+import {TestBed} from '@angular/core/testing';
+import {SettingsService} from './settings.service';
+
+describe('SettingsService', () => {
+  let service: SettingsService;
+
+  beforeEach(() => TestBed.configureTestingModule({
+    providers: [
+      SettingsService,
+    ],
+  }));
+
+  beforeEach(() => {
+    service = TestBed.inject(SettingsService);
+  });
+
+  it('should be created', () => {
+    expect(service).toBeTruthy();
+  });
+});