### Question:
DefaultEnsembleProvider implements EnsembleProvider { @Override public void setConnectionString(String connectionString) { } DefaultEnsembleProvider(String serverList); @Override void start(); @Override String getConnectionString(); @Override void close(); @Override void setConnectionString(String connectionString); @Override boolean updateServerListEnabled();  }### Answer:
@Test public void setConnectionString() { EnsembleProvider ensembleProvider = new DefaultEnsembleProvider(DEFAULT_SERVER_LIST); ensembleProvider.setConnectionString("otherHost:2181"); Assert.assertEquals(DEFAULT_SERVER_LIST, ensembleProvider.getConnectionString()); }