net/http/httptest: make ResponseRecorder.Result.Status match http.Transport

Fixes #18438

Change-Id: I9599c1536d5e8bad7662b8ffa19e9b0746e27e60
Reviewed-on: https://go-review.googlesource.com/44000Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

src/net/http/httptest/recorder.go

@@ -6,6 +6,7 @@ package httptest
 
 import (
 	"bytes"
+	"fmt"
 	"io/ioutil"
 	"net/http"
 	"strconv"
@@ -176,7 +177,7 @@ func (rw *ResponseRecorder) Result() *http.Response {
 	if res.StatusCode == 0 {
 		res.StatusCode = 200
 	}
-	res.Status = http.StatusText(res.StatusCode)
+	res.Status = fmt.Sprintf("%03d %s", res.StatusCode, http.StatusText(res.StatusCode))
 	if rw.Body != nil {
 		res.Body = ioutil.NopCloser(bytes.NewReader(rw.Body.Bytes()))
 	}

src/net/http/httptest/recorder_test.go

@@ -23,7 +23,15 @@ func TestRecorder(t *testing.T) {
 			return nil
 		}
 	}
-	hasResultStatus := func(wantCode int) checkFunc {
+	hasResultStatus := func(want string) checkFunc {
+		return func(rec *ResponseRecorder) error {
+			if rec.Result().Status != want {
+				return fmt.Errorf("Result().Status = %q; want %q", rec.Result().Status, want)
+			}
+			return nil
+		}
+	}
+	hasResultStatusCode := func(wantCode int) checkFunc {
 		return func(rec *ResponseRecorder) error {
 			if rec.Result().StatusCode != wantCode {
 				return fmt.Errorf("Result().StatusCode = %d; want %d", rec.Result().StatusCode, wantCode)
@@ -235,7 +243,8 @@ func TestRecorder(t *testing.T) {
 				hasOldHeader("X-Foo", "1"),
 				hasStatus(0),
 				hasHeader("X-Foo", "1"),
-				hasResultStatus(200),
+				hasResultStatus("200 OK"),
+				hasResultStatusCode(200),
 			),
 		},
 		{