test/bench/go1: add http test

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/7529048

test/bench/go1/http_test.go

+// Copyright 2013 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package go1
+
+import (
+	"bytes"
+	"io/ioutil"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+// BenchmarkHTTPClientServer benchmarks both the HTTP client and the HTTP server,
+// on small requests.
+func BenchmarkHTTPClientServer(b *testing.B) {
+	msg := []byte("Hello world.\n")
+	ts := httptest.NewServer(http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
+		rw.Write(msg)
+	}))
+	defer ts.Close()
+
+	tr := &http.Transport{}
+	defer tr.CloseIdleConnections()
+	cl := &http.Client{
+		Transport: tr,
+	}
+
+	b.ResetTimer()
+
+	for i := 0; i < b.N; i++ {
+		res, err := cl.Get(ts.URL)
+		if err != nil {
+			b.Fatal("Get:", err)
+		}
+		all, err := ioutil.ReadAll(res.Body)
+		if err != nil {
+			b.Fatal("ReadAll:", err)
+		}
+		if !bytes.Equal(all, msg) {
+			b.Fatalf("Got body %q; want %q", all, msg)
+		}
+	}
+}