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package org.apache.poi.ss.formula.functions;
import junit.framework.TestCase;
import junit.framework.AssertionFailedError;
import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.hssf.HSSFTestDataSamples;
import org.apache.poi.ss.usermodel.CellValue;
/**
* Tests for {@link Npv}
*
* @author Marcel May
* @see <a href="http://office.microsoft.com/en-us/excel-help/npv-HP005209199.aspx">Excel Help</a>
*/
public final class TestNpv extends TestCase {
public void testEvaluateInSheetExample2() {
HSSFWorkbook wb = new HSSFWorkbook();
HSSFSheet sheet = wb.createSheet("Sheet1");
HSSFRow row = sheet.createRow(0);
sheet.createRow(1).createCell(0).setCellValue(0.08d);
sheet.createRow(2).createCell(0).setCellValue(-40000d);
sheet.createRow(3).createCell(0).setCellValue(8000d);
sheet.createRow(4).createCell(0).setCellValue(9200d);
sheet.createRow(5).createCell(0).setCellValue(10000d);
sheet.createRow(6).createCell(0).setCellValue(12000d);
sheet.createRow(7).createCell(0).setCellValue(14500d);
HSSFCell cell = row.createCell(8);
HSSFFormulaEvaluator fe = new HSSFFormulaEvaluator(wb);
// Enumeration
cell.setCellFormula("NPV(A2, A4,A5,A6,A7,A8)+A3");
fe.clearAllCachedResultValues();
fe.evaluateFormulaCellEnum(cell);
double res = cell.getNumericCellValue();
assertEquals(1922.06d, Math.round(res * 100d) / 100d);
// Range
cell.setCellFormula("NPV(A2, A4:A8)+A3");
fe.clearAllCachedResultValues();
fe.evaluateFormulaCellEnum(cell);
res = cell.getNumericCellValue();
assertEquals(1922.06d, Math.round(res * 100d) / 100d);
}
/**
* evaluate formulas with NPV and compare the result with
* the cached formula result pre-calculated by Excel
*/
public void testNpvFromSpreadsheet(){
HSSFWorkbook wb = HSSFTestDataSamples.openSampleWorkbook("IrrNpvTestCaseData.xls");
HSSFSheet sheet = wb.getSheet("IRR-NPV");
HSSFFormulaEvaluator fe = new HSSFFormulaEvaluator(wb);
StringBuffer failures = new StringBuffer();
int failureCount = 0;
// TODO YK: Formulas in rows 16 and 17 operate with ArrayPtg which isn't yet supported
// FormulaEvaluator as of r1041407 throws "Unexpected ptg class (org.apache.poi.ss.formula.ptg.ArrayPtg)"
for(int rownum = 9; rownum <= 15; rownum++){
HSSFRow row = sheet.getRow(rownum);
HSSFCell cellB = row.getCell(1);
try {
CellValue cv = fe.evaluate(cellB);
assertFormulaResult(cv, cellB);
} catch (Throwable e){
if(failures.length() > 0) failures.append('\n');
failures.append("Row[" + (cellB.getRowIndex() + 1)+ "]: " + cellB.getCellFormula() + " ");
failures.append(e.getMessage());
failureCount++;
}
}
if(failures.length() > 0) {
throw new AssertionFailedError(failureCount + " IRR evaluations failed:\n" + failures);
}
}
private static void assertFormulaResult(CellValue cv, HSSFCell cell){
double actualValue = cv.getNumberValue();
double expectedValue = cell.getNumericCellValue(); // cached formula result calculated by Excel
assertEquals(expectedValue, actualValue, 1E-4); // should agree within 0.01%
}
}