assertEquals(5, sheet1.getNumMergedRegions()); //G5:H5 unmerged
for (int j = 0; j < 5; ++j) {
CellRangeAddress rng = sheet1.getMergedRegion(j);
switch(j) {
case 0:
assertEquals("E4:F5", rng.formatAsString()); //E6:F8 -> E4:F5
break;
case 1:
assertEquals("E7:F9", rng.formatAsString()); //E10:F12 -> E7:F9
break;
case 2: