CircuitBreakerDataSource extends AbstractUnsupportedOperationDataSource implements AutoCloseable { @Override public void close() { }  @Override void close(); @Override Connection getConnection(); @Override Connection getConnection(final String username, final String password); @Override PrintWriter getLogWriter(); @Override void setLogWriter(final PrintWriter out); @Override Logger getParentLogger();  }
@Test public void assertClose() { dataSource.close(); }