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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

}

// NewRecorder returns an initialized ResponseRecorder.

func NewRecorder() *ResponseRecorder {

        return &ResponseRecorder{

                HeaderMap: make(http.Header),

                Body:      new(bytes.Buffer),

        }

}

// 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 {

        return rw.HeaderMap

}

// Write always succeeds and writes to rw.Body, if not nil.

func (rw *ResponseRecorder) Write(buf []byte) (int, error) {

        if rw.Body != nil {

                rw.Body.Write(buf)

        }

        if rw.Code == 0 {

                rw.Code = http.StatusOK

        }

        return len(buf), nil

}

// WriteHeader sets rw.Code.

func (rw *ResponseRecorder) WriteHeader(code int) {

        rw.Code = code

}

// Flush sets rw.Flushed to true.

func (rw *ResponseRecorder) Flush() {

        rw.Flushed = true

}