test_set_alignments
test_set_alignments(buf, 0, MATCH);
test_set_alignments(buf, 10, MATCH);
test_set_alignments(buf, 20, MATCH);
test_set_alignments(buf, 30, MATCH);
test_set_alignments(buf, 0, NOMATCH);
test_set_alignments(buf, 10, NOMATCH);
test_set_alignments(buf, 20, NOMATCH);
test_set_alignments(buf, 30, NOMATCH);