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// 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 httptest provides utilities for HTTP testing.
package httptest
import (
"bytes"
"net/http"
)
// ResponseRecorder is an implementation of http.ResponseWriter that
// records its mutations for later inspection in tests.
type ResponseRecorder struct {
Code int // the HTTP response code from WriteHeader
HeaderMap http.Header // the HTTP response headers
Body *bytes.Buffer // if non-nil, the bytes.Buffer to append written data to
Flushed bool
wroteHeader bool
}
// NewRecorder returns an initialized ResponseRecorder.
func NewRecorder() *ResponseRecorder {
return &ResponseRecorder{
HeaderMap: make(http.Header),
Body: new(bytes.Buffer),
Code: 200,
}
}
// DefaultRemoteAddr is the default remote address to return in RemoteAddr if
// an explicit DefaultRemoteAddr isn't set on ResponseRecorder.
const DefaultRemoteAddr = "1.2.3.4"
// Header returns the response headers.
func (rw *ResponseRecorder) Header() http.Header {
m := rw.HeaderMap
if m == nil {
m = make(http.Header)
rw.HeaderMap = m
}
return m
}
// Write always succeeds and writes to rw.Body, if not nil.
func (rw *ResponseRecorder) Write(buf []byte) (int, error) {
if !rw.wroteHeader {
rw.WriteHeader(200)
}
if rw.Body != nil {
rw.Body.Write(buf)
}
return len(buf), nil
}
// WriteHeader sets rw.Code.
func (rw *ResponseRecorder) WriteHeader(code int) {
if !rw.wroteHeader {
rw.Code = code
}
rw.wroteHeader = true
}
// Flush sets rw.Flushed to true.
func (rw *ResponseRecorder) Flush() {
if !rw.wroteHeader {
rw.WriteHeader(200)
}
rw.Flushed = true
}
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