assertEquals(0, index.findNextPosition(-1));
assertEquals(5, index.findNextPosition(1));
assertEquals(5, index.findNextPosition(5));
assertEquals(15, index.findNextPosition(11));
assertEquals(15, index.findNextPosition(15));
assertEquals(-1, index.findNextPosition(16));
assertEquals(5, index.alignSliceStartToIndex(3, 20));
assertEquals(15, index.alignSliceStartToIndex(15, 20));
assertEquals(10, index.alignSliceEndToIndex(8, 30));
assertEquals(10, index.alignSliceEndToIndex(10, 30));