WIP: Fix tests

src/app/auth/token-interceptor.ts

 import { Injectable } from '@angular/core';
 import { HttpRequest, HttpHandler, HttpEvent, HttpInterceptor } from '@angular/common/http';
+
 import { Observable } from 'rxjs';
 
 import { AuthService } from './auth.service';
 import { environment } from '../../environments/environment';
 
 @Injectable()
+/**
+ * @class
+ * @classdesc Token interceptor.
+ *
+ * @implements HttpInterceptor
+ */
 export class TokenInterceptor implements HttpInterceptor {
     constructor(private authService: AuthService) { }