code review 4620049: http: make Headers be source of truth

src/cmd/gofix/httpheaders_test.go

+// Copyright 2011 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 main
+
+func init() {
+        addTestCases(httpHeadersTests)
+}
+
+var httpHeadersTests = []testCase{
+        {
+                Name: "httpheaders.0",
+                In: `package headertest
+
+import (
+        "http"
+)
+
+type Other struct {
+        Referer   string
+        UserAgent string
+        Cookie    []*http.Cookie
+}
+
+func f(req *http.Request, res *http.Response, other *Other) {
+        _ = req.Referer
+        _ = req.UserAgent
+        _ = req.Cookie
+
+        _ = res.Cookie
+
+        _ = other.Referer
+        _ = other.UserAgent
+        _ = other.Cookie
+
+        _ = req.Referer()
+        _ = req.UserAgent()
+        _ = req.Cookies()
+        _ = res.Cookies()
+}
+`,
+                Out: `package headertest
+
+import (
+        "http"
+)
+
+type Other struct {
+        Referer   string
+        UserAgent string
+        Cookie    []*http.Cookie
+}
+
+func f(req *http.Request, res *http.Response, other *Other) {
+        _ = req.Referer()
+        _ = req.UserAgent()
+        _ = req.Cookies()
+
+        _ = res.Cookies()
+
+        _ = other.Referer
+        _ = other.UserAgent
+        _ = other.Cookie
+
+        _ = req.Referer()
+        _ = req.UserAgent()
+        _ = req.Cookies()
+        _ = res.Cookies()
+}
+`,
+        },
+}