assertEquals(1, events.size());
        assertNotNull(events.get(0).getThrowable());
        assertTrue(events.get(0).getThrowable().contains("RuntimeException"));
        assertTrue(events.get(0).getThrowable().contains("test exception"));
        assertTrue(events.get(0).getThrowable().length() <= 500);
    }

    @Test
    public void test_append_nullLoggerName() {

      throws Exception {
    checkNotNull(expected);
    checkNotNull(methodName);
    checkNotNull(arguments);
    sendRequest(methodName, arguments);
    assertThat(getResponse(methodName).getThrowable()).isInstanceOf(expected);
  }

  /**
   * Causes this thread to call the named method, and asserts that this thread becomes blocked on

      throws Exception {
    checkNotNull(expected);
    checkNotNull(methodName);
    checkNotNull(arguments);
    sendRequest(methodName, arguments);
    assertThat(getResponse(methodName).getThrowable()).isInstanceOf(expected);
  }

  /**
   * Causes this thread to call the named method, and asserts that this thread becomes blocked on

            return message;
        }

        /**
         * Returns the throwable string.
         *
         * @return the throwable string, or null
         */
        public String getThrowable() {
            return throwable;
        }
    }

                    source.put("loggerName", event.getLoggerName());
                    source.put("message", event.getMessage());
                    source.put("throwable", event.getThrowable() != null ? event.getThrowable() : "");
                    source.put("timestamp", event.getTimestamp());
                    bulkRequest.add(client.prepareIndex().setIndex(indexName).setSource(source));
                }