int nside = 2;
int ipnext = (int) pt.next_in_line_nest(nside, ipix);
assertEquals("ipnext=" + ipnext, 23, ipnext, 1e-10);
ipix = 1;
nside = 2;
ipnext = (int) pt.next_in_line_nest(nside, ipix);
assertEquals("ipnext=" + ipnext, 6, ipnext, 1e-10);
ipix = 4;
nside = 2;
ipnext = (int) pt.next_in_line_nest(nside, ipix);
assertEquals("ipnext=" + ipnext, 27, ipnext, 1e-10);