### Question:
OpenTSDBConnection implements Connection4TSDB { @Override public String version() { return TSDBUtils.version(address); } OpenTSDBConnection(String address); @Override String address(); @Override String version(); @Override String config(); @Override String[] getSupportVersionPrefix(); @Override void sendDPs(String metric, Long start, Long end, RecordSender recordSender); @Override boolean put(DataPoint4TSDB dp); @Override boolean put(List<DataPoint4TSDB> dps); @Override boolean isSupported();  }### Answer:
@Test public void testVersion() { String version = new OpenTSDBConnection(OPENTSDB_ADDRESS).version(); Assert.assertNotNull(version); }