SBook book = SBooks.createBook("book1");
		book.getBookSeries().setAutoFormulaCacheClean(true);
		SSheet sheet1 = book.createSheet("Sheet1");
		
		sheet1.getCell("E4").setValue("=E4");
		Assert.assertEquals("#N/A", sheet1.getCell("E4").getErrorValue().getErrorString());
		
		sheet1.getCell("E4").setValue("=A1");
		
		Assert.assertEquals(0D, sheet1.getCell("E4").getValue());
		
		SRanges.range(sheet1,"4").insert(InsertShift.DEFAULT, InsertCopyOrigin.FORMAT_NONE);
		
		sheet1.getCell("A1").setValue(20);
		Assert.assertEquals("A1", sheet1.getCell("E5").getFormulaValue());
		Assert.assertEquals(20D, sheet1.getCell("E5").getValue());
		
		
		Assert.assertTrue(sheet1.getCell("E4").isNull());
		
		sheet1.getCell("E4").setValue("=E4");
		Assert.assertEquals("#N/A", sheet1.getCell("E4").getErrorValue().getErrorString());