Fake a HTTP Request/Client.Do response w/o a webserver.

http.request_mock.go

type recordingTransport struct {
	req *http.Request
}

func (t *recordingTransport) RoundTrip(req *http.Request) (resp *http.Response, err error) {
	t.req = req
	return &http.Response{
		Body: ioutil.NopCloser(bytes.NewBufferString("alfa")),
	}, nil
}

func TestNewScraper(t *testing.T) {	
	client = &http.Client{
		Timeout:   time.Millisecond * 10,
		Transport: &recordingTransport{},
	}
  
  request, _ := http.NewRequest("", "http://dummy.faketld/", nil)
  resp := Client.Do(request)
  //respBody will be "alfa"
}