@Test
public void testBasicLogstashFormat() throws JsonException {

    PaxLoggingEvent event = MockEvents.createInfoEvent();
    JsonObject object = Json.createReader(new StringReader(format.toString(event))).readObject();
    assertEquals(MockEvents.LOG_MESSAGE, object.getString(LogstashEventFormat.MESSAGE));
    assertEquals(MockEvents.LOGGER_NAME, object.getString(LogstashEventFormat.SOURCE));
    assertEquals("INFO", object.getJsonArray(LogstashEventFormat.TAGS).getString(0));
    assertEquals(MockEvents.LOG_PROPERTY_VALUE,
                 object.getJsonObject(LogstashEventFormat.FIELDS).getString(MockEvents.LOG_PROPERTY_ID));
    assertNotNull(object.get(LogstashEventFormat.TIMESTAMP));
    System.out.println(object);
}