assertEquals(0, sheet.getColumnBreaks().length);
sheet.setColumnBreak((short) 11);
assertNotNull(sheet.getColumnBreaks());
sheet.setColumnBreak((short) 12);
assertEquals(2, sheet.getColumnBreaks().length);
sheet.removeColumnBreak((short) 11);
assertEquals(1, sheet.getColumnBreaks().length);
sheet.removeColumnBreak((short) 15);
assertEquals(1, sheet.getColumnBreaks().length);
}