How to inject HTTP in jasmine with a real connection

How to realize a jasmine test using http injection with a real backend?

I means that I would like to test my service using a real http connection

import { provide }                                               from '@angular/core';
import{ClassCall} from 'xx.xx'

import {HTTP_PROVIDERS, XHRBackend, Http} from "@angular/http";
import {MockBackend} from "@angular/http/testing/mock_backend";
import {beforeEachProviders} from "@angular/core/testing/testing";
import {inject} from "@angular/core/testing/test_injector";
import {async} from "@angular/core/testing/async";



describe('HttpService Tests', () => {
  beforeEachProviders(() => {
    return [
      HTTP_PROVIDERS,
      Http,
      ClassCall,
      provide(ClassCall, {useClass: Http}),
    ];
  })

    it('should return response when subscribed to postRequest',
      async(inject([ClassCall], (myCall: ClassCall) => {

        myCall.Call("hey", "there")
          .then((response)=>{
            expect(response).toBe("anyResponse")
          })
      })));
  });

I have not seen any topics about it....

Many thanks!!!!!