poi/src/ooxml/testcases/org/apache/poi/xssf/usermodel/TestXSSFBugs.java

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   this work for additional information regarding copyright ownership.
   The ASF licenses this file to You under the Apache License, Version 2.0
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package org.apache.poi.xssf.usermodel;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.util.List;

import org.apache.poi.POIXMLDocumentPart;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.openxml4j.opc.OPCPackage;
import org.apache.poi.openxml4j.opc.PackagePart;
import org.apache.poi.openxml4j.opc.PackagingURIHelper;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.ss.formula.eval.NotImplementedException;
import org.apache.poi.xssf.XSSFITestDataProvider;
import org.apache.poi.xssf.XSSFTestDataSamples;
import org.apache.poi.xssf.model.CalculationChain;
import org.apache.poi.xssf.usermodel.extensions.XSSFCellFill;
import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTWorksheet;

public final class TestXSSFBugs extends BaseTestBugzillaIssues {

    public TestXSSFBugs() {
        super(XSSFITestDataProvider.instance);
    }

    /**
     * test writing a file with large number of unique strings,
     * open resulting file in Excel to check results!
     */
    public void test15375_2() {
        baseTest15375(1000);
    }

    /**
     * Named ranges had the right reference, but
     *  the wrong sheet name
     */
    public void test45430() {
        XSSFWorkbook wb = XSSFTestDataSamples.openSampleWorkbook("45430.xlsx");
        assertFalse(wb.isMacroEnabled());
        assertEquals(3, wb.getNumberOfNames());

        assertEquals(0, wb.getNameAt(0).getCTName().getLocalSheetId());
        assertFalse(wb.getNameAt(0).getCTName().isSetLocalSheetId());
        assertEquals("SheetA!$A$1", wb.getNameAt(0).getRefersToFormula());
        assertEquals("SheetA", wb.getNameAt(0).getSheetName());

        assertEquals(0, wb.getNameAt(1).getCTName().getLocalSheetId());
        assertFalse(wb.getNameAt(1).getCTName().isSetLocalSheetId());
        assertEquals("SheetB!$A$1", wb.getNameAt(1).getRefersToFormula());
        assertEquals("SheetB", wb.getNameAt(1).getSheetName());

        assertEquals(0, wb.getNameAt(2).getCTName().getLocalSheetId());
        assertFalse(wb.getNameAt(2).getCTName().isSetLocalSheetId());
        assertEquals("SheetC!$A$1", wb.getNameAt(2).getRefersToFormula());
        assertEquals("SheetC", wb.getNameAt(2).getSheetName());

        // Save and re-load, still there
        XSSFWorkbook nwb = XSSFTestDataSamples.writeOutAndReadBack(wb);
        assertEquals(3, nwb.getNumberOfNames());
        assertEquals("SheetA!$A$1", nwb.getNameAt(0).getRefersToFormula());
    }

    /**
     * We should carry vba macros over after save
     */
    public void test45431() throws Exception {
        XSSFWorkbook wb = XSSFTestDataSamples.openSampleWorkbook("45431.xlsm");
        OPCPackage pkg = wb.getPackage();
        assertTrue(wb.isMacroEnabled());

        // Check the various macro related bits can be found
        PackagePart vba = pkg.getPart(
                PackagingURIHelper.createPartName("/xl/vbaProject.bin")
        );
        assertNotNull(vba);
        // And the drawing bit
        PackagePart drw = pkg.getPart(
                PackagingURIHelper.createPartName("/xl/drawings/vmlDrawing1.vml")
        );
        assertNotNull(drw);


        // Save and re-open, both still there
        XSSFWorkbook nwb = XSSFTestDataSamples.writeOutAndReadBack(wb);
        OPCPackage nPkg = nwb.getPackage();
        assertTrue(nwb.isMacroEnabled());

        vba = nPkg.getPart(
                PackagingURIHelper.createPartName("/xl/vbaProject.bin")
        );
        assertNotNull(vba);
        drw = nPkg.getPart(
                PackagingURIHelper.createPartName("/xl/drawings/vmlDrawing1.vml")
        );
        assertNotNull(drw);

        // And again, just to be sure
        nwb = XSSFTestDataSamples.writeOutAndReadBack(nwb);
        nPkg = nwb.getPackage();
        assertTrue(nwb.isMacroEnabled());

        vba = nPkg.getPart(
                PackagingURIHelper.createPartName("/xl/vbaProject.bin")
        );
        assertNotNull(vba);
        drw = nPkg.getPart(
                PackagingURIHelper.createPartName("/xl/drawings/vmlDrawing1.vml")
        );
        assertNotNull(drw);
    }

    public void test47504() {
        XSSFWorkbook wb = XSSFTestDataSamples.openSampleWorkbook("47504.xlsx");
        assertEquals(1, wb.getNumberOfSheets());
        XSSFSheet sh = wb.getSheetAt(0);
        XSSFDrawing drawing = sh.createDrawingPatriarch();
        List<POIXMLDocumentPart> rels = drawing.getRelations();
        assertEquals(1, rels.size());
        assertEquals("Sheet1!A1", rels.get(0).getPackageRelationship().getTargetURI().getFragment());

        // And again, just to be sure
        wb = XSSFTestDataSamples.writeOutAndReadBack(wb);
        assertEquals(1, wb.getNumberOfSheets());
        sh = wb.getSheetAt(0);
        drawing = sh.createDrawingPatriarch();
        rels = drawing.getRelations();
        assertEquals(1, rels.size());
        assertEquals("Sheet1!A1", rels.get(0).getPackageRelationship().getTargetURI().getFragment());
    }
    
    /**
     * Excel will sometimes write a button with a textbox
     *  containing &gt;br&lt; (not closed!).
     * Clearly Excel shouldn't do this, but test that we can
     *  read the file despite the naughtyness
     */
    public void test49020() throws Exception {
       XSSFWorkbook wb = XSSFTestDataSamples.openSampleWorkbook("BrNotClosed.xlsx");
    }

    /**
     * ensure that CTPhoneticPr is loaded by the ooxml test suite so that it is included in poi-ooxml-schemas
     */
    public void test49325() throws Exception {
        XSSFWorkbook wb = XSSFTestDataSamples.openSampleWorkbook("49325.xlsx");
        CTWorksheet sh = wb.getSheetAt(0).getCTWorksheet();
        assertNotNull(sh.getPhoneticPr());
    }
    
    /**
     * Names which are defined with a Sheet
     *  should return that sheet index properly 
     */
    public void test48923() throws Exception {
       XSSFWorkbook wb = XSSFTestDataSamples.openSampleWorkbook("48923.xlsx");
       assertEquals(4, wb.getNumberOfNames());
       
       Name b1 = wb.getName("NameB1");
       Name b2 = wb.getName("NameB2");
       Name sheet2 = wb.getName("NameSheet2");
       Name test = wb.getName("Test");
       
       assertNotNull(b1);
       assertEquals("NameB1", b1.getNameName());
       assertEquals("Sheet1", b1.getSheetName());
       assertEquals(-1, b1.getSheetIndex());
       
       assertNotNull(b2);
       assertEquals("NameB2", b2.getNameName());
       assertEquals("Sheet1", b2.getSheetName());
       assertEquals(-1, b2.getSheetIndex());
       
       assertNotNull(sheet2);
       assertEquals("NameSheet2", sheet2.getNameName());
       assertEquals("Sheet2", sheet2.getSheetName());
       assertEquals(-1, sheet2.getSheetIndex());
       
       assertNotNull(test);
       assertEquals("Test", test.getNameName());
       assertEquals("Sheet1", test.getSheetName());
       assertEquals(-1, test.getSheetIndex());
    }
    
    /**
     * Problem with evaluation formulas due to
     *  NameXPtgs.
     * Blows up on:
     *   IF(B6= (ROUNDUP(B6,0) + ROUNDDOWN(B6,0))/2, MROUND(B6,2),ROUND(B6,0))
     * 
     * TODO: delete this test case when MROUND and VAR are implemented
     */
    public void test48539() throws Exception {
       XSSFWorkbook wb = XSSFTestDataSamples.openSampleWorkbook("48539.xlsx");
       assertEquals(3, wb.getNumberOfSheets());
       
       // Try each cell individually
       XSSFFormulaEvaluator eval = new XSSFFormulaEvaluator(wb);
       for(int i=0; i<wb.getNumberOfSheets(); i++) {
          Sheet s = wb.getSheetAt(i);
          for(Row r : s) {
             for(Cell c : r) {
                if(c.getCellType() == Cell.CELL_TYPE_FORMULA) {
                    CellValue cv = eval.evaluate(c);
                    if(cv.getCellType() == Cell.CELL_TYPE_NUMERIC) {
                        // assert that the calculated value agrees with
                        // the cached formula result calculated by Excel
                        double cachedFormulaResult = c.getNumericCellValue();
                        double evaluatedFormulaResult = cv.getNumberValue();
                        assertEquals(c.getCellFormula(), cachedFormulaResult, evaluatedFormulaResult, 1E-7);
                    }
                }
             }
          }
       }
       
       // Now all of them
        XSSFFormulaEvaluator.evaluateAllFormulaCells(wb);
    }
    
    /**
     * Foreground colours should be found even if
     *  a theme is used 
     */
    public void test48779() throws Exception {
       XSSFWorkbook wb = XSSFTestDataSamples.openSampleWorkbook("48779.xlsx");
       XSSFCell cell = wb.getSheetAt(0).getRow(0).getCell(0);
       XSSFCellStyle cs = cell.getCellStyle();
       
       assertNotNull(cs);
       assertEquals(1, cs.getIndex());

       // Look at the low level xml elements
       assertEquals(2, cs.getCoreXf().getFillId());
       assertEquals(0, cs.getCoreXf().getXfId());
       assertEquals(true, cs.getCoreXf().getApplyFill());
       
       XSSFCellFill fg = wb.getStylesSource().getFillAt(2);
       assertEquals(0, fg.getFillForegroundColor().getIndexed());
       assertEquals(0.0, fg.getFillForegroundColor().getTint());
       assertEquals("FFFF0000", fg.getFillForegroundColor().getARGBHex());
       assertEquals(64, fg.getFillBackgroundColor().getIndexed());
       
       // Now look higher up
       assertNotNull(cs.getFillForegroundXSSFColor());
       assertEquals(0, cs.getFillForegroundColor());
       assertEquals("FFFF0000", cs.getFillForegroundXSSFColor().getARGBHex());
       assertEquals("FFFF0000", cs.getFillForegroundColorColor().getARGBHex());
       
       assertNotNull(cs.getFillBackgroundColor());
       assertEquals(64, cs.getFillBackgroundColor());
       assertEquals(null, cs.getFillBackgroundXSSFColor().getARGBHex());
       assertEquals(null, cs.getFillBackgroundColorColor().getARGBHex());
    }
    
    /**
     * With HSSF, if you create a font, don't change it, and
     *  create a 2nd, you really do get two fonts that you 
     *  can alter as and when you want.
     * With XSSF, that wasn't the case, but this verfies
     *  that it now is again
     */
    public void test48718() throws Exception {
       // Verify the HSSF behaviour
       // Then ensure the same for XSSF
       Workbook[] wbs = new Workbook[] {
             new HSSFWorkbook(),
             new XSSFWorkbook()
       };
       int[] initialFonts = new int[] { 4, 1 };
       for(int i=0; i<wbs.length; i++) {
          Workbook wb = wbs[i];
          int startingFonts = initialFonts[i];
          
          assertEquals(startingFonts, wb.getNumberOfFonts());
          
          // Get a font, and slightly change it
          Font a = wb.createFont();
          assertEquals(startingFonts+1, wb.getNumberOfFonts());
          a.setFontHeightInPoints((short)23);
          assertEquals(startingFonts+1, wb.getNumberOfFonts());
          
          // Get two more, unchanged
          Font b = wb.createFont();
          assertEquals(startingFonts+2, wb.getNumberOfFonts());
          Font c = wb.createFont();
          assertEquals(startingFonts+3, wb.getNumberOfFonts());
       }
    }
    
    /**
     * Ensure General and @ format are working properly
     *  for integers 
     */
    public void test47490() throws Exception {
       XSSFWorkbook wb = XSSFTestDataSamples.openSampleWorkbook("GeneralFormatTests.xlsx");
       Sheet s = wb.getSheetAt(1);
       Row r;
       DataFormatter df = new DataFormatter();
       
       r = s.getRow(1);
       assertEquals(1.0, r.getCell(2).getNumericCellValue());
       assertEquals("General", r.getCell(2).getCellStyle().getDataFormatString());
       assertEquals("1", df.formatCellValue(r.getCell(2)));
       assertEquals("1", df.formatRawCellContents(1.0, -1, "@"));
       assertEquals("1", df.formatRawCellContents(1.0, -1, "General"));
              
       r = s.getRow(2);
       assertEquals(12.0, r.getCell(2).getNumericCellValue());
       assertEquals("General", r.getCell(2).getCellStyle().getDataFormatString());
       assertEquals("12", df.formatCellValue(r.getCell(2)));
       assertEquals("12", df.formatRawCellContents(12.0, -1, "@"));
       assertEquals("12", df.formatRawCellContents(12.0, -1, "General"));
       
       r = s.getRow(3);
       assertEquals(123.0, r.getCell(2).getNumericCellValue());
       assertEquals("General", r.getCell(2).getCellStyle().getDataFormatString());
       assertEquals("123", df.formatCellValue(r.getCell(2)));
       assertEquals("123", df.formatRawCellContents(123.0, -1, "@"));
       assertEquals("123", df.formatRawCellContents(123.0, -1, "General"));
    }
    
    /**
     * Ensures that XSSF and HSSF agree with each other,
     *  and with the docs on when fetching the wrong
     *  kind of value from a Formula cell
     */
    public void test47815() {
       Workbook[] wbs = new Workbook[] {
             new HSSFWorkbook(),
             new XSSFWorkbook()
       };
       for(Workbook wb : wbs) {
          Sheet s = wb.createSheet();
          Row r = s.createRow(0);
          
          // Setup
          Cell cn = r.createCell(0, Cell.CELL_TYPE_NUMERIC);
          cn.setCellValue(1.2);
          Cell cs = r.createCell(1, Cell.CELL_TYPE_STRING);
          cs.setCellValue("Testing");
          
          Cell cfn = r.createCell(2, Cell.CELL_TYPE_FORMULA);
          cfn.setCellFormula("A1");  
          Cell cfs = r.createCell(3, Cell.CELL_TYPE_FORMULA);
          cfs.setCellFormula("B1");
          
          FormulaEvaluator fe = wb.getCreationHelper().createFormulaEvaluator();
          assertEquals(Cell.CELL_TYPE_NUMERIC, fe.evaluate(cfn).getCellType());
          assertEquals(Cell.CELL_TYPE_STRING, fe.evaluate(cfs).getCellType());
          fe.evaluateFormulaCell(cfn);
          fe.evaluateFormulaCell(cfs);
          
          // Now test
          assertEquals(Cell.CELL_TYPE_NUMERIC, cn.getCellType());
          assertEquals(Cell.CELL_TYPE_STRING, cs.getCellType());
          assertEquals(Cell.CELL_TYPE_FORMULA, cfn.getCellType());
          assertEquals(Cell.CELL_TYPE_NUMERIC, cfn.getCachedFormulaResultType());
          assertEquals(Cell.CELL_TYPE_FORMULA, cfs.getCellType());
          assertEquals(Cell.CELL_TYPE_STRING, cfs.getCachedFormulaResultType());
          
          // Different ways of retrieving
          assertEquals(1.2, cn.getNumericCellValue());
          try {
             cn.getRichStringCellValue();
             fail();
          } catch(IllegalStateException e) {}
          
          assertEquals("Testing", cs.getStringCellValue());
          try {
             cs.getNumericCellValue();
             fail();
          } catch(IllegalStateException e) {}
          
          assertEquals(1.2, cfn.getNumericCellValue());
          try {
             cfn.getRichStringCellValue();
             fail();
          } catch(IllegalStateException e) {}
          
          assertEquals("Testing", cfs.getStringCellValue());
          try {
             cfs.getNumericCellValue();
             fail();
          } catch(IllegalStateException e) {}
       }
    }

    /**
     * A problem file from a non-standard source (a scientific instrument that saves its
     * output as an .xlsx file) that have two issues:
     * 1. The Content Type part name is lower-case:  [content_types].xml
     * 2. The file appears to use backslashes as path separators
     *
     * The OPC spec tolerates both of these peculiarities, so does POI
     */
    public void test49609() throws Exception {
        XSSFWorkbook wb =  XSSFTestDataSamples.openSampleWorkbook("49609.xlsx");
        assertEquals("FAM", wb.getSheetName(0));
        assertEquals("Cycle", wb.getSheetAt(0).getRow(0).getCell(1).getStringCellValue());

    }

    public void test49783() throws Exception {
        Workbook wb =  XSSFTestDataSamples.openSampleWorkbook("49783.xlsx");
        Sheet sheet = wb.getSheetAt(0);
        FormulaEvaluator evaluator = wb.getCreationHelper().createFormulaEvaluator();
        Cell cell;

        cell = sheet.getRow(0).getCell(0);
        assertEquals("#REF!*#REF!", cell.getCellFormula());
        assertEquals(Cell.CELL_TYPE_ERROR, evaluator.evaluateInCell(cell).getCellType());
        assertEquals("#REF!", FormulaError.forInt(cell.getErrorCellValue()).getString());

        Name nm1 = wb.getName("sale_1");
        assertNotNull("name sale_1 should be present", nm1);
        assertEquals("Sheet1!#REF!", nm1.getRefersToFormula());
        Name nm2 = wb.getName("sale_2");
        assertNotNull("name sale_2 should be present", nm2);
        assertEquals("Sheet1!#REF!", nm2.getRefersToFormula());

        cell = sheet.getRow(1).getCell(0);
        assertEquals("sale_1*sale_2", cell.getCellFormula());
        assertEquals(Cell.CELL_TYPE_ERROR, evaluator.evaluateInCell(cell).getCellType());
        assertEquals("#REF!", FormulaError.forInt(cell.getErrorCellValue()).getString());
    }
    
    /**
     * Creating a rich string of "hello world" and applying
     *  a font to characters 1-5 means we have two strings,
     *  "hello" and " world". As such, we need to apply
     *  preserve spaces to the 2nd bit, lest we end up
     *  with something like "helloworld" !
     */
    public void test49941() throws Exception {
       XSSFWorkbook wb = new XSSFWorkbook();
       XSSFSheet s = wb.createSheet();
       XSSFRow r = s.createRow(0);
       XSSFCell c = r.createCell(0);
       
       // First without fonts
       c.setCellValue(
             new XSSFRichTextString(" with spaces ")
       );
       assertEquals(" with spaces ", c.getRichStringCellValue().toString());
       assertEquals(0, c.getRichStringCellValue().getCTRst().sizeOfRArray());
       assertEquals(true, c.getRichStringCellValue().getCTRst().isSetT());
       // Should have the preserve set
       assertEquals(
             1,
             c.getRichStringCellValue().getCTRst().xgetT().getDomNode().getAttributes().getLength()
       );
       assertEquals(
             "preserve",
             c.getRichStringCellValue().getCTRst().xgetT().getDomNode().getAttributes().item(0).getNodeValue()
       );
       
       // Save and check
       wb = XSSFTestDataSamples.writeOutAndReadBack(wb);
       s = wb.getSheetAt(0);
       r = s.getRow(0);
       c = r.getCell(0);
       assertEquals(" with spaces ", c.getRichStringCellValue().toString());
       assertEquals(0, c.getRichStringCellValue().getCTRst().sizeOfRArray());
       assertEquals(true, c.getRichStringCellValue().getCTRst().isSetT());
       
       // Change the string
       c.setCellValue(
             new XSSFRichTextString("hello world")
       );
       assertEquals("hello world", c.getRichStringCellValue().toString());
       // Won't have preserve
       assertEquals(
             0,
             c.getRichStringCellValue().getCTRst().xgetT().getDomNode().getAttributes().getLength()
       );
       
       // Apply a font
       XSSFFont f = wb.createFont();
       f.setBold(true);
       c.getRichStringCellValue().applyFont(0, 5, f);
       assertEquals("hello world", c.getRichStringCellValue().toString());
       // Does need preserving on the 2nd part
       assertEquals(2, c.getRichStringCellValue().getCTRst().sizeOfRArray());
       assertEquals(
             0,
             c.getRichStringCellValue().getCTRst().getRArray(0).xgetT().getDomNode().getAttributes().getLength()
       );
       assertEquals(
             1,
             c.getRichStringCellValue().getCTRst().getRArray(1).xgetT().getDomNode().getAttributes().getLength()
       );
       assertEquals(
             "preserve",
             c.getRichStringCellValue().getCTRst().getRArray(1).xgetT().getDomNode().getAttributes().item(0).getNodeValue()
       );
       
       // Save and check
       wb = XSSFTestDataSamples.writeOutAndReadBack(wb);
       s = wb.getSheetAt(0);
       r = s.getRow(0);
       c = r.getCell(0);
       assertEquals("hello world", c.getRichStringCellValue().toString());
    }
    
    /**
     * Repeatedly writing the same file which has styles
     * TODO Currently failing
     */
    public void DISABLEDtest49940() throws Exception {
       XSSFWorkbook wb = XSSFTestDataSamples.openSampleWorkbook("styles.xlsx");
       assertEquals(3, wb.getNumberOfSheets());
       assertEquals(10, wb.getStylesSource().getNumCellStyles());
       
       ByteArrayOutputStream b1 = new ByteArrayOutputStream();
       ByteArrayOutputStream b2 = new ByteArrayOutputStream();
       ByteArrayOutputStream b3 = new ByteArrayOutputStream();
       wb.write(b1);
       wb.write(b2);
       wb.write(b3);
       
       for(byte[] data : new byte[][] {
             b1.toByteArray(), b2.toByteArray(), b3.toByteArray()
       }) {
          ByteArrayInputStream bais = new ByteArrayInputStream(data);
          wb = new XSSFWorkbook(bais);
          assertEquals(3, wb.getNumberOfSheets());
          assertEquals(10, wb.getStylesSource().getNumCellStyles());
       }
    }

    /**
     * Various ways of removing a cell formula should all zap
     *  the calcChain entry.
     */
    public void test49966() throws Exception {
       XSSFWorkbook wb = XSSFTestDataSamples.openSampleWorkbook("shared_formulas.xlsx");
       XSSFSheet sheet = wb.getSheetAt(0);
       
       // CalcChain has lots of entries
       CalculationChain cc = wb.getCalculationChain();
       assertEquals("A2", cc.getCTCalcChain().getCArray(0).getR());
       assertEquals("A3", cc.getCTCalcChain().getCArray(1).getR());
       assertEquals("A4", cc.getCTCalcChain().getCArray(2).getR());
       assertEquals("A5", cc.getCTCalcChain().getCArray(3).getR());
       assertEquals("A6", cc.getCTCalcChain().getCArray(4).getR());
       assertEquals("A7", cc.getCTCalcChain().getCArray(5).getR());
       assertEquals("A8", cc.getCTCalcChain().getCArray(6).getR());
       assertEquals(40, cc.getCTCalcChain().sizeOfCArray());

       // Try various ways of changing the formulas
       // If it stays a formula, chain entry should remain
       // Otherwise should go
       sheet.getRow(1).getCell(0).setCellFormula("A1"); // stay
       sheet.getRow(2).getCell(0).setCellFormula(null);  // go
       sheet.getRow(3).getCell(0).setCellType(Cell.CELL_TYPE_FORMULA); // stay
       sheet.getRow(4).getCell(0).setCellType(Cell.CELL_TYPE_STRING);  // go
       sheet.getRow(5).removeCell(
             sheet.getRow(5).getCell(0)  // go
       );
        sheet.getRow(6).getCell(0).setCellType(Cell.CELL_TYPE_BLANK);  // go
        sheet.getRow(7).getCell(0).setCellValue((String)null);  // go

       // Save and check
       wb = XSSFTestDataSamples.writeOutAndReadBack(wb);
       assertEquals(35, cc.getCTCalcChain().sizeOfCArray());

       cc = wb.getCalculationChain();
       assertEquals("A2", cc.getCTCalcChain().getCArray(0).getR());
       assertEquals("A4", cc.getCTCalcChain().getCArray(1).getR());
       assertEquals("A9", cc.getCTCalcChain().getCArray(2).getR());

    }

    public void test49156() throws Exception {
        Workbook wb = XSSFTestDataSamples.openSampleWorkbook("49156.xlsx");
        FormulaEvaluator formulaEvaluator = wb.getCreationHelper().createFormulaEvaluator();

        Sheet sheet = wb.getSheetAt(0);
        for(Row row : sheet){
            for(Cell cell : row){
                if(cell.getCellType() == Cell.CELL_TYPE_FORMULA){
                    formulaEvaluator.evaluateInCell(cell); // caused NPE on some cells
                }
            }
        }
    }
}