An incrementing http client RoundTripper

incrt.go

import (
	"bytes"
	"fmt"
	"io/ioutil"
	"net/http"
	"testing"
)

type incrt byte

func (rt incrt) RoundTrip(req *http.Request) (*http.Response, error) {
	rt++
	return &http.Response{
		StatusCode: int(rt + 200),
		Status:     fmt.Sprintf("%d Foo", rt+200),
		Header:     http.Header{"X-Value": []string{fmt.Sprintf("test/foo%d", rt)}},
		Body:       ioutil.NopCloser(bytes.NewReader([]byte{byte(rt) + '0'})),
	}, nil
}