poi/src/testcases/org/apache/poi/ss/formula/eval/TestFormulaBugs.java

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package org.apache.poi.ss.formula.eval;

import org.apache.poi.hssf.HSSFTestDataSamples;
import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.ss.usermodel.*;
import org.junit.Test;

import java.io.IOException;
import java.io.InputStream;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;

/**
 * Miscellaneous tests for bugzilla entries.<p/> The test name contains the
 * bugzilla bug id.
 */
public final class TestFormulaBugs {

	/**
	 * Bug 27349 - VLOOKUP with reference to another sheet.<p/> This test was
	 * added <em>long</em> after the relevant functionality was fixed.
	 */
    @Test
	public void test27349() throws Exception {
		// 27349-vlookupAcrossSheets.xls is bugzilla/attachment.cgi?id=10622
		InputStream is = HSSFTestDataSamples.openSampleFileStream("27349-vlookupAcrossSheets.xls");
        // original bug may have thrown exception here,
        // or output warning to stderr
		Workbook wb = new HSSFWorkbook(is);

		Sheet sheet = wb.getSheetAt(0);
		Row row = sheet.getRow(1);
		Cell cell = row.getCell(0);

		// this definitely would have failed due to 27349
		assertEquals("VLOOKUP(1,'DATA TABLE'!$A$8:'DATA TABLE'!$B$10,2)", cell
				.getCellFormula());

		// We might as well evaluate the formula
		FormulaEvaluator fe = wb.getCreationHelper().createFormulaEvaluator();
		CellValue cv = fe.evaluate(cell);

		assertEquals(CellType.NUMERIC, cv.getCellTypeEnum());
		assertEquals(3.0, cv.getNumberValue(), 0.0);
		
		wb.close();
		is.close();
	}

	/**
	 * Bug 27405 - isnumber() formula always evaluates to false in if statement<p/>
	 * 
	 * seems to be a duplicate of 24925
	 */
    @Test
	public void test27405() throws Exception {
		Workbook wb = new HSSFWorkbook();
		Sheet sheet = wb.createSheet("input");
		// input row 0
		Row row = sheet.createRow(0);
		/*Cell cell =*/ row.createCell(0);
		Cell cell = row.createCell(1);
		cell.setCellValue(1); // B1
		// input row 1
		row = sheet.createRow(1);
		cell = row.createCell(1);
		cell.setCellValue(999); // B2

		int rno = 4;
		row = sheet.createRow(rno);
		cell = row.createCell(1); // B5
		cell.setCellFormula("isnumber(b1)");
		cell = row.createCell(3); // D5
		cell.setCellFormula("IF(ISNUMBER(b1),b1,b2)");

//		if (false) { // set true to check excel file manually
//			// bug report mentions 'Editing the formula in excel "fixes" the problem.'
//			try {
//				FileOutputStream fileOut = new FileOutputStream("27405output.xls");
//				wb.write(fileOut);
//				fileOut.close();
//			} catch (IOException e) {
//				throw new RuntimeException(e);
//			}
//		}
		
		// use POI's evaluator as an extra sanity check
		FormulaEvaluator fe = wb.getCreationHelper().createFormulaEvaluator();
		CellValue cv;
		cv = fe.evaluate(cell);
		assertEquals(CellType.NUMERIC, cv.getCellTypeEnum());
		assertEquals(1.0, cv.getNumberValue(), 0.0);
		
		cv = fe.evaluate(row.getCell(1));
		assertEquals(CellType.BOOLEAN, cv.getCellTypeEnum());
		assertEquals(true, cv.getBooleanValue());
		
		wb.close();
	}

	/**
	 * Bug 42448 - Can't parse SUMPRODUCT(A!C7:A!C67, B8:B68) / B69 <p/>
	 * @throws IOException 
	 */
    @Test
	public void test42448() throws IOException {
		Workbook wb = new HSSFWorkbook();
		Sheet sheet1 = wb.createSheet("Sheet1");

		Row row = sheet1.createRow(0);
		Cell cell = row.createCell(0);

		// it's important to create the referenced sheet first
		Sheet sheet2 = wb.createSheet("A"); // note name 'A'
		// TODO - POI crashes if the formula is added before this sheet
		// RuntimeException("Zero length string is an invalid sheet name")
		// Excel doesn't crash but the formula doesn't work until it is
		// re-entered

		String inputFormula = "SUMPRODUCT(A!C7:A!C67, B8:B68) / B69"; // as per bug report
		try {
			cell.setCellFormula(inputFormula); 
		} catch (StringIndexOutOfBoundsException e) {
			fail("Identified bug 42448");
		}

		assertEquals("SUMPRODUCT(A!C7:A!C67,B8:B68)/B69", cell.getCellFormula());

		// might as well evaluate the sucker...

		addCell(sheet2, 5, 2, 3.0); // A!C6
		addCell(sheet2, 6, 2, 4.0); // A!C7
		addCell(sheet2, 66, 2, 5.0); // A!C67
		addCell(sheet2, 67, 2, 6.0); // A!C68

		addCell(sheet1, 6, 1, 7.0); // B7
		addCell(sheet1, 7, 1, 8.0); // B8
		addCell(sheet1, 67, 1, 9.0); // B68
		addCell(sheet1, 68, 1, 10.0); // B69

		double expectedResult = (4.0 * 8.0 + 5.0 * 9.0) / 10.0;

		FormulaEvaluator fe = wb.getCreationHelper().createFormulaEvaluator();
		CellValue cv = fe.evaluate(cell);

		assertEquals(CellType.NUMERIC, cv.getCellTypeEnum());
		assertEquals(expectedResult, cv.getNumberValue(), 0.0);

		wb.close();
	}

	private static void addCell(Sheet sheet, int rowIx, int colIx,
			double value) {
		sheet.createRow(rowIx).createCell(colIx).setCellValue(value);
	}

	@Test
	public void test55032() throws IOException {
        Workbook wb = new HSSFWorkbook();
        Sheet sheet = wb.createSheet("input");

        Row row = sheet.createRow(0);
        Cell cell = row.createCell(1);

        checkFormulaValue(wb, cell, "PV(0.08/12, 20*12, 500, ,0)", -59777.14585);
        checkFormulaValue(wb, cell, "PV(0.08/12, 20*12, 500, ,)", -59777.14585);
        checkFormulaValue(wb, cell, "PV(0.08/12, 20*12, 500, 500,)", -59878.6315455);
        
        checkFormulaValue(wb, cell, "FV(0.08/12, 20*12, 500, ,)", -294510.2078107270);
        checkFormulaValue(wb, cell, "PMT(0.08/12, 20*12, 500, ,)", -4.1822003450);
        checkFormulaValue(wb, cell, "NPER(0.08/12, 20*12, 500, ,)", -2.0758873434);

        wb.close();
	}

    private void checkFormulaValue(Workbook wb, Cell cell, String formula, double expectedValue) {
        cell.setCellFormula(formula);
	    
        FormulaEvaluator evaluator = wb.getCreationHelper().createFormulaEvaluator();
        CellValue value = evaluator.evaluate(cell);
        
        assertEquals(expectedValue, value.getNumberValue(), 0.0001);
    }
}