text: package test
  
  import (
  	"bytes"
  	"compress/gzip"
  	"encoding/json"
  	"fmt"
  	"io"
  	"io/ioutil"
  	"mime"
  	"net/http"
  	"net/http/httptest"
  	"strings"
  	"testing"
  )
  
  // MakeSimpleRequest returns a http.Request. The returned request object can be
  // further prepared by adding headers and query string parmaters, for instance.
  func MakeSimpleRequest(method string, urlStr string, payload interface{}) *http.Request {
  	var s string
  
  	if payload != nil {
  		b, err := json.Marshal(payload)
  		if err != nil {
  			panic(err)
  		}
  		s = fmt.Sprintf("%s", b)
  	}
  
  	r, err := http.NewRequest(method, urlStr, strings.NewReader(s))
  	if err != nil {
  		panic(err)
  	}
  	r.Header.Set("Accept-Encoding", "gzip")
  	if payload != nil {
  		r.Header.Set("Content-Type", "application/json")
  	}
  
  	return r
  }
  
  // CodeIs compares the rescorded status code
  func CodeIs(t *testing.T, r *httptest.ResponseRecorder, expectedCode int) {
  	if r.Code != expectedCode {
  		t.Errorf("Code %d expected, got: %d", expectedCode, r.Code)
  	}
  }
  
  // HeaderIs tests the first value for the given headerKey
  func HeaderIs(t *testing.T, r *httptest.ResponseRecorder, headerKey, expectedValue string) {
  	value := r.HeaderMap.Get(headerKey)
  	if value != expectedValue {
  		t.Errorf(
  			"%s: %s expected, got: %s",
  			headerKey,
  			expectedValue,
  			value,
  		)
  	}
  }
  
  func ContentTypeIsJson(t *testing.T, r *httptest.ResponseRecorder) {
  
  	mediaType, params, _ := mime.ParseMediaType(r.HeaderMap.Get("Content-Type"))
  	charset := params["charset"]
  
  	if mediaType != "application/json" {
  		t.Errorf(
  			"Content-Type media type: application/json expected, got: %s",
  			mediaType,
  		)
  	}
  
  	if charset != "" && strings.ToUpper(charset) != "UTF-8" {
  		t.Errorf(
  			"Content-Type charset: must be empty or UTF-8, got: %s",
  			charset,
  		)
  	}
  }
  
  func ContentEncodingIsGzip(t *testing.T, r *httptest.ResponseRecorder) {
  	HeaderIs(t, r, "Content-Encoding", "gzip")
  }
  
  func BodyIs(t *testing.T, r *httptest.ResponseRecorder, expectedBody string) {
  	body, err := DecodedBody(r)
  	if err != nil {
  		t.Errorf("Body '%s' expected, got error: '%s'", expectedBody, err)
  	}
  	if string(body) != expectedBody {
  		t.Errorf("Body '%s' expected, got: '%s'", expectedBody, body)
  	}
  }
  
  func DecodeJsonPayload(r *httptest.ResponseRecorder, v interface{}) error {
  	content, err := DecodedBody(r)
  	if err != nil {
  		return err
  	}
  	err = json.Unmarshal(content, v)
  	if err != nil {
  		return err
  	}
  	return nil
  }
  
  // DecodedBody returns the entire body read from r.Body, with it
  // gunzipped if Content-Encoding is set to gzip
  func DecodedBody(r *httptest.ResponseRecorder) ([]byte, error) {
  	if r.Header().Get("Content-Encoding") != "gzip" {
  		return ioutil.ReadAll(r.Body)
  	}
  	dec, err := gzip.NewReader(r.Body)
  	if err != nil {
  		return nil, err
  	}
  	b := new(bytes.Buffer)
  	if _, err = io.Copy(b, dec); err != nil {
  		return nil, err
  	}
  	if err = dec.Close(); err != nil {
  		return nil, err
  	}
  	return b.Bytes(), nil
  }
  
  type Recorded struct {
  	T        *testing.T
  	Recorder *httptest.ResponseRecorder
  }
  
  // RunRequest runs a HTTP request through the given handler
  func RunRequest(t *testing.T, handler http.Handler, request *http.Request) *Recorded {
  	recorder := httptest.NewRecorder()
  	handler.ServeHTTP(recorder, request)
  	return &Recorded{t, recorder}
  }
  
  func (rd *Recorded) CodeIs(expectedCode int) {
  	CodeIs(rd.T, rd.Recorder, expectedCode)
  }
  
  func (rd *Recorded) HeaderIs(headerKey, expectedValue string) {
  	HeaderIs(rd.T, rd.Recorder, headerKey, expectedValue)
  }
  
  func (rd *Recorded) ContentTypeIsJson() {
  	ContentTypeIsJson(rd.T, rd.Recorder)
  }
  
  func (rd *Recorded) ContentEncodingIsGzip() {
  	rd.HeaderIs("Content-Encoding", "gzip")
  }
  
  func (rd *Recorded) BodyIs(expectedBody string) {
  	BodyIs(rd.T, rd.Recorder, expectedBody)
  }
  
  func (rd *Recorded) DecodeJsonPayload(v interface{}) error {
  	return DecodeJsonPayload(rd.Recorder, v)
  }
  
  func (rd *Recorded) DecodedBody() ([]byte, error) {
  	return DecodedBody(rd.Recorder)
  }
  