@Test
public void testGetColumnLabel() {

	assertEquals("A", SpreadsheetUtils.getColumnLabel(0));
	assertEquals("E", SpreadsheetUtils.getColumnLabel(4));
	assertEquals("Z", SpreadsheetUtils.getColumnLabel(25));
	assertEquals("AA", SpreadsheetUtils.getColumnLabel(26));
	assertEquals("ZAFZ", SpreadsheetUtils.getColumnLabel(457833));
}