AlignmentSorter.sortByFeature(null, null, 0, al.getWidth(), al,
AlignmentSorter.FEATURE_SCORE);
assertSame(al.getSequenceAt(3), seq3); // -0.5
AlignmentSorter.sortByFeature(null, null, 0, al.getWidth(), al,
AlignmentSorter.FEATURE_SCORE);
assertSame(al.getSequenceAt(3), seq3); // -0.5