protected void assertSameJoinOrder(final int[] expected,final TestHelper helper) throws Exception {
  assertSameJoinOrder(Collections.singletonList(expected),helper);
}

protected void assertSameJoinOrder ( final int [ ] expected , final TestHelper helper ) throws Exception { assertSameJoinOrder ( Collections . singletonList ( expected ) , helper ) ; }
helper to run the test and examine the rto determined solution .
