Runtime error on stream read.

main.go

package main

import (
	"bytes"
	"fmt"
	"io/ioutil"
	"log"
	"net/http"
	"net/http/httptest"
)

func main() {
	rec := httptest.NewRecorder()

	req, err := http.NewRequest("POST", "/", nil)

	if err != nil {
		log.Fatal(err)
	}

	req.Write(bytes.NewBufferString("Hello"))

	Handle(rec, req)
}

func Handle(w http.ResponseWriter, r *http.Request) {
	body, err := ioutil.ReadAll(r.Body)

	if err != nil {
		log.Fatal(err)
	}

	fmt.Printf("Body: %s", body)
}