@Test
 public void return_attachment_with_open_data_stream() throws Exception {
   ResponseOnFileStub rsp = ResponseOnFileStub.newInstance(200, "attachment.txt", "text", 12);
   when(httpClient.get("/test_db/some_doc_id/some_attachment")).thenReturn(rsp);
   AttachmentInputStream a = dbCon.getAttachment("some_doc_id", "some_attachment");
   assertNotNull(a);
   assertFalse(rsp.isConnectionReleased());
   assertEquals("detta är ett påhäng med ett ö i", IOUtils.toString(a, "UTF-8"));
   assertEquals(rsp.getContentType(), a.getContentType());
   assertEquals(rsp.getContentLength(), a.getContentLength());
 }