type MockBody struct {
       buf *bytes.Buffer
}

func (m MockBody) Close() error {
       return nil
}

func (m MockBody) Read(p []byte) (n int, err error) {
       return m.buf.Read(p)
}

func NewMockBody(jsonBody []byte) *MockBody {
  ret := MockBody{
    buf: bytes.NewBuffer(jsonBody),
  }
  return &ret
}