net/http/httptrace: use strings.Builder

Change-Id: I407d11b43349cd78b709deb7b0e774bd93922caa
Reviewed-on: https://go-review.googlesource.com/c/go/+/428269
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>

diff --git a/src/net/http/httptrace/trace_test.go b/src/net/http/httptrace/trace_test.go
index bb57ada8531322e1988de133ff19287b9e0e8839..6efa1f79401b95f536dbe51f6040935f820077cc 100644 (file)
--- a/src/net/http/httptrace/trace_test.go
+++ b/src/net/http/httptrace/trace_test.go
@@ -5,13 +5,13 @@
 package httptrace
 
 import (
-       "bytes"
        "context"
+       "strings"
        "testing"
 )
 
 func TestWithClientTrace(t *testing.T) {
-       var buf bytes.Buffer
+       var buf strings.Builder
        connectStart := func(b byte) func(network, addr string) {
                return func(network, addr string) {
                        buf.WriteByte(b)
@@ -37,7 +37,7 @@ func TestWithClientTrace(t *testing.T) {
 }
 
 func TestCompose(t *testing.T) {
-       var buf bytes.Buffer
+       var buf strings.Builder
        var testNum int
 
        connectStart := func(b byte) func(network, addr string) {