Do not reset response body

responder.go

@@ -3,6 +3,7 @@ package gock
 import (
 	"bytes"
 	"io"
+	"io/ioutil"
 	"net/http"
 	"strconv"
 	"time"
@@ -82,24 +83,5 @@ func mergeHeaders(res *http.Response, mres *Response) http.Header {
 // createReadCloser creates an io.ReadCloser from a byte slice that is suitable for use as an
 // http response body.
 func createReadCloser(body []byte) io.ReadCloser {
-	return &dummyReadCloser{body: bytes.NewReader(body)}
-}
-
-// dummyReadCloser is used internally as io.ReadCloser capable interface for bodies.
-type dummyReadCloser struct {
-	body io.ReadSeeker
-}
-
-// Read implements the required method by io.ReadClose interface.
-func (d *dummyReadCloser) Read(p []byte) (n int, err error) {
-	n, err = d.body.Read(p)
-	if err == io.EOF {
-		d.body.Seek(0, 0)
-	}
-	return n, err
-}
-
-// Close implements a no-op required method by io.ReadClose interface.
-func (d *dummyReadCloser) Close() error {
-	return nil
+	return ioutil.NopCloser(bytes.NewReader(body))
 }

responder_test.go

@@ -23,6 +23,24 @@ func TestResponder(t *testing.T) {
 	st.Expect(t, string(body), "foo")
 }
 
+func TestResponder_ReadTwice(t *testing.T) {
+	defer after()
+	mres := New("http://foo.com").Reply(200).BodyString("foo")
+	req := &http.Request{}
+
+	res, err := Responder(req, mres, nil)
+	st.Expect(t, err, nil)
+	st.Expect(t, res.Status, "200 OK")
+	st.Expect(t, res.StatusCode, 200)
+
+	body, _ := ioutil.ReadAll(res.Body)
+	st.Expect(t, string(body), "foo")
+
+	body, err = ioutil.ReadAll(res.Body)
+	st.Expect(t, err, nil)
+	st.Expect(t, body, []byte{})
+}
+
 func TestResponderSupportsMultipleHeadersWithSameKey(t *testing.T) {
 	defer after()
 	mres := New("http://foo").