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

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package org.apache.poi.xssf.usermodel;

import static org.junit.Assert.*;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import org.apache.poi.hssf.HSSFTestDataSamples;
import org.apache.poi.ss.usermodel.BaseTestFormulaEvaluator;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellValue;
import org.apache.poi.ss.usermodel.FormulaEvaluator;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.util.CellReference;
import org.apache.poi.xssf.XSSFITestDataProvider;
import org.apache.poi.xssf.XSSFTestDataSamples;
import org.junit.Ignore;
import org.junit.Test;

public final class TestXSSFFormulaEvaluation extends BaseTestFormulaEvaluator {

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

    @Test
    public void testSharedFormulas() throws IOException {
        baseTestSharedFormulas("shared_formulas.xlsx");
    }

    @Test
    public void testSharedFormulas_evaluateInCell() throws IOException {
        XSSFWorkbook wb = (XSSFWorkbook)_testDataProvider.openSampleWorkbook("49872.xlsx");
        FormulaEvaluator evaluator = wb.getCreationHelper().createFormulaEvaluator();
        XSSFSheet sheet = wb.getSheetAt(0);

        double result = 3.0;

        // B3 is a master shared formula, C3 and D3 don't have the formula written in their f element.
        // Instead, the attribute si for a particular cell is used to figure what the formula expression
        // should be based on the cell's relative location to the master formula, e.g.
        // B3:        <f t="shared" ref="B3:D3" si="0">B1+B2</f>
        // C3 and D3: <f t="shared" si="0"/>

        // get B3 and evaluate it in the cell
        XSSFCell b3 = sheet.getRow(2).getCell(1);
        assertEquals(result, evaluator.evaluateInCell(b3).getNumericCellValue(), 0);

        //at this point the master formula is gone, but we are still able to evaluate dependent cells
        XSSFCell c3 = sheet.getRow(2).getCell(2);
        assertEquals(result, evaluator.evaluateInCell(c3).getNumericCellValue(), 0);

        XSSFCell d3 = sheet.getRow(2).getCell(3);
        assertEquals(result, evaluator.evaluateInCell(d3).getNumericCellValue(), 0);
        
        wb.close();
    }

    /**
     * Evaluation of cell references with column indexes greater than 255. See bugzilla 50096
     */
    @Test
    public void testEvaluateColumnGreaterThan255() throws IOException {
        XSSFWorkbook wb = (XSSFWorkbook) _testDataProvider.openSampleWorkbook("50096.xlsx");
        XSSFFormulaEvaluator evaluator = wb.getCreationHelper().createFormulaEvaluator();

        /*
         *  The first row simply contains the numbers 1 - 300.
         *  The second row simply refers to the cell value above in the first row by a simple formula.
         */
        for (int i = 245; i < 265; i++) {
            XSSFCell cell_noformula = wb.getSheetAt(0).getRow(0).getCell(i);
            XSSFCell cell_formula = wb.getSheetAt(0).getRow(1).getCell(i);

            CellReference ref_noformula = new CellReference(cell_noformula.getRowIndex(), cell_noformula.getColumnIndex());
            CellReference ref_formula = new CellReference(cell_noformula.getRowIndex(), cell_noformula.getColumnIndex());
            String fmla = cell_formula.getCellFormula();
            // assure that the formula refers to the cell above.
            // the check below is 'deep' and involves conversion of the shared formula:
            // in the sample file a shared formula in GN1 is spanned in the range GN2:IY2,
            assertEquals(ref_noformula.formatAsString(), fmla);

            CellValue cv_noformula = evaluator.evaluate(cell_noformula);
            CellValue cv_formula = evaluator.evaluate(cell_formula);
            assertEquals("Wrong evaluation result in " + ref_formula.formatAsString(),
                    cv_noformula.getNumberValue(), cv_formula.getNumberValue(), 0);
        }
        
        wb.close();
    }
    
    /**
     * Related to bugs #56737 and #56752 - XSSF workbooks which have
     *  formulas that refer to cells and named ranges in multiple other
     *  workbooks, both HSSF and XSSF ones
     */
    @Test
    public void testReferencesToOtherWorkbooks() throws Exception {
        XSSFWorkbook wb = (XSSFWorkbook) _testDataProvider.openSampleWorkbook("ref2-56737.xlsx");
        XSSFFormulaEvaluator evaluator = wb.getCreationHelper().createFormulaEvaluator();
        XSSFSheet s = wb.getSheetAt(0);
        
        // References to a .xlsx file
        Row rXSLX = s.getRow(2);
        Cell cXSLX_cell = rXSLX.getCell(4);
        Cell cXSLX_sNR  = rXSLX.getCell(6);
        Cell cXSLX_gNR  = rXSLX.getCell(8);
        assertEquals("[1]Uses!$A$1",        cXSLX_cell.getCellFormula());
        assertEquals("[1]Defines!NR_To_A1", cXSLX_sNR.getCellFormula());
        assertEquals("[1]!NR_Global_B2",    cXSLX_gNR.getCellFormula());
        
        assertEquals("Hello!", cXSLX_cell.getStringCellValue());
        assertEquals("Test A1", cXSLX_sNR.getStringCellValue());
        assertEquals(142.0, cXSLX_gNR.getNumericCellValue(), 0);
        
        // References to a .xls file
        Row rXSL = s.getRow(4);
        Cell cXSL_cell = rXSL.getCell(4);
        Cell cXSL_sNR  = rXSL.getCell(6);
        Cell cXSL_gNR  = rXSL.getCell(8);
        assertEquals("[2]Uses!$C$1",        cXSL_cell.getCellFormula());
        assertEquals("[2]Defines!NR_To_A1", cXSL_sNR.getCellFormula());
        assertEquals("[2]!NR_Global_B2",    cXSL_gNR.getCellFormula());
        
        assertEquals("Hello!", cXSL_cell.getStringCellValue());
        assertEquals("Test A1", cXSL_sNR.getStringCellValue());
        assertEquals(142.0, cXSL_gNR.getNumericCellValue(), 0);
        
        // Try to evaluate without references, won't work
        // (At least, not unit we fix bug #56752 that is)
        try {
            evaluator.evaluate(cXSL_cell);
            fail("Without a fix for #56752, shouldn't be able to evaluate a " +
                 "reference to a non-provided linked workbook");
        } catch(Exception e) {
            // expected here
        }
        
        // Setup the environment
        Map<String,FormulaEvaluator> evaluators = new HashMap<>();
        evaluators.put("ref2-56737.xlsx", evaluator);
        evaluators.put("56737.xlsx", 
                _testDataProvider.openSampleWorkbook("56737.xlsx").getCreationHelper().createFormulaEvaluator());
        evaluators.put("56737.xls", 
                HSSFTestDataSamples.openSampleWorkbook("56737.xls").getCreationHelper().createFormulaEvaluator());
        evaluator.setupReferencedWorkbooks(evaluators);
        
        // Try evaluating all of them, ensure we don't blow up
        for(Row r : s) {
            for (Cell c : r) {
                evaluator.evaluate(c);
            }
        }
        // And evaluate the other way too
        evaluator.evaluateAll();
        
        // Static evaluator won't work, as no references passed in
        try {
            XSSFFormulaEvaluator.evaluateAllFormulaCells(wb);
            fail("Static method lacks references, shouldn't work");
        } catch(Exception e) {
            // expected here
        }
        
        
        // Evaluate specific cells and check results
        assertEquals("\"Hello!\"",  evaluator.evaluate(cXSLX_cell).formatAsString());
        assertEquals("\"Test A1\"", evaluator.evaluate(cXSLX_sNR).formatAsString());
        assertEquals("142.0",   evaluator.evaluate(cXSLX_gNR).formatAsString());

        assertEquals("\"Hello!\"",  evaluator.evaluate(cXSL_cell).formatAsString());
        assertEquals("\"Test A1\"", evaluator.evaluate(cXSL_sNR).formatAsString());
        assertEquals("142.0",   evaluator.evaluate(cXSL_gNR).formatAsString());
        
        
        // Add another formula referencing these workbooks
        Cell cXSL_cell2 = rXSL.createCell(40);
        cXSL_cell2.setCellFormula("[56737.xls]Uses!$C$1");
        // TODO Shouldn't it become [2] like the others?
        assertEquals("[56737.xls]Uses!$C$1", cXSL_cell2.getCellFormula());
        assertEquals("\"Hello!\"",  evaluator.evaluate(cXSL_cell2).formatAsString());
        
        
        // Now add a formula that refers to yet another (different) workbook
        // Won't work without the workbook being linked
        Cell cXSLX_nw_cell = rXSLX.createCell(42);
        try {
            cXSLX_nw_cell.setCellFormula("[alt.xlsx]Sheet1!$A$1");
            fail("New workbook not linked, shouldn't be able to add");
        } catch (Exception e) {
            // expected here
        }
        
        // Link and re-try
        try (Workbook alt = new XSSFWorkbook()) {
            alt.createSheet().createRow(0).createCell(0).setCellValue("In another workbook");
            // TODO Implement the rest of this, see bug #57184
/*
            wb.linkExternalWorkbook("alt.xlsx", alt);

            cXSLX_nw_cell.setCellFormula("[alt.xlsx]Sheet1!$A$1");
            // Check it - TODO Is this correct? Or should it become [3]Sheet1!$A$1 ?
            assertEquals("[alt.xlsx]Sheet1!$A$1", cXSLX_nw_cell.getCellFormula());

            // Evaluate it, without a link to that workbook
            try {
                evaluator.evaluate(cXSLX_nw_cell);
                fail("No cached value and no link to workbook, shouldn't evaluate");
            } catch(Exception e) {}

            // Add a link, check it does
            evaluators.put("alt.xlsx", alt.getCreationHelper().createFormulaEvaluator());
            evaluator.setupReferencedWorkbooks(evaluators);

            evaluator.evaluate(cXSLX_nw_cell);
            assertEquals("In another workbook", cXSLX_nw_cell.getStringCellValue());
*/
        }
        
        wb.close();
    }
    
    /**
     * If a formula references cells or named ranges in another workbook,
     *  but that isn't available at evaluation time, the cached values
     *  should be used instead
     * TODO Add the support then add a unit test
     * See bug #56752
     */
    @Test
    @Ignore
    public void testCachedReferencesToOtherWorkbooks() throws Exception {
        // TODO
        fail("unit test not written yet");
    }
    
    /**
     * A handful of functions (such as SUM, COUNTA, MIN) support
     *  multi-sheet references (eg Sheet1:Sheet3!A1 = Cell A1 from
     *  Sheets 1 through Sheet 3).
     * This test, based on common test files for HSSF and XSSF, checks
     *  that we can correctly evaluate these
     */
    @Test
    public void testMultiSheetReferencesHSSFandXSSF() throws Exception {
        Workbook wb1 = HSSFTestDataSamples.openSampleWorkbook("55906-MultiSheetRefs.xls");
        Workbook wb2 = XSSFTestDataSamples.openSampleWorkbook("55906-MultiSheetRefs.xlsx");

        for (Workbook wb : new Workbook[] {wb1,wb2}) {
            FormulaEvaluator evaluator = wb.getCreationHelper().createFormulaEvaluator();
            Sheet s1 = wb.getSheetAt(0);

            
            // Simple SUM over numbers
            Cell sumF = s1.getRow(2).getCell(0);
            assertNotNull(sumF);
            assertEquals("SUM(Sheet1:Sheet3!A1)", sumF.getCellFormula());
            assertEquals("Failed for " + wb.getClass(), "66.0", evaluator.evaluate(sumF).formatAsString());
            
            
            // Various Stats formulas on numbers
            Cell avgF = s1.getRow(2).getCell(1);
            assertNotNull(avgF);
            assertEquals("AVERAGE(Sheet1:Sheet3!A1)", avgF.getCellFormula());
            assertEquals("22.0", evaluator.evaluate(avgF).formatAsString());
            
            Cell minF = s1.getRow(3).getCell(1);
            assertNotNull(minF);
            assertEquals("MIN(Sheet1:Sheet3!A$1)", minF.getCellFormula());
            assertEquals("11.0", evaluator.evaluate(minF).formatAsString());
            
            Cell maxF = s1.getRow(4).getCell(1);
            assertNotNull(maxF);
            assertEquals("MAX(Sheet1:Sheet3!A$1)", maxF.getCellFormula());
            assertEquals("33.0", evaluator.evaluate(maxF).formatAsString());
            
            Cell countF = s1.getRow(5).getCell(1);
            assertNotNull(countF);
            assertEquals("COUNT(Sheet1:Sheet3!A$1)", countF.getCellFormula());
            assertEquals("3.0", evaluator.evaluate(countF).formatAsString());
            
            
            // Various CountAs on Strings
            Cell countA_1F = s1.getRow(2).getCell(2);
            assertNotNull(countA_1F);
            assertEquals("COUNTA(Sheet1:Sheet3!C1)", countA_1F.getCellFormula());
            assertEquals("3.0", evaluator.evaluate(countA_1F).formatAsString());
            
            Cell countA_2F = s1.getRow(2).getCell(3);
            assertNotNull(countA_2F);
            assertEquals("COUNTA(Sheet1:Sheet3!D1)", countA_2F.getCellFormula());
            assertEquals("0.0", evaluator.evaluate(countA_2F).formatAsString());
            
            Cell countA_3F = s1.getRow(2).getCell(4);
            assertNotNull(countA_3F);
            assertEquals("COUNTA(Sheet1:Sheet3!E1)", countA_3F.getCellFormula());
            assertEquals("3.0", evaluator.evaluate(countA_3F).formatAsString());
        }
        
        wb2.close();
        wb1.close();
    }
    
    /**
     * A handful of functions (such as SUM, COUNTA, MIN) support
     *  multi-sheet areas (eg Sheet1:Sheet3!A1:B2 = Cell A1 to Cell B2,
     *  from Sheets 1 through Sheet 3).
     * This test, based on common test files for HSSF and XSSF, checks
     *  that we can correctly evaluate these
     */
    @Test
    public void testMultiSheetAreasHSSFandXSSF() throws IOException {
        Workbook wb1 = HSSFTestDataSamples.openSampleWorkbook("55906-MultiSheetRefs.xls");
        Workbook wb2 = XSSFTestDataSamples.openSampleWorkbook("55906-MultiSheetRefs.xlsx");

        for (Workbook wb : new Workbook[]{wb1,wb2}) {
            FormulaEvaluator evaluator = wb.getCreationHelper().createFormulaEvaluator();
            Sheet s1 = wb.getSheetAt(0);

            
            // SUM over a range
            Cell sumFA = s1.getRow(2).getCell(7);
            assertNotNull(sumFA);
            assertEquals("SUM(Sheet1:Sheet3!A1:B2)", sumFA.getCellFormula());
            assertEquals("Failed for " + wb.getClass(), "110.0", evaluator.evaluate(sumFA).formatAsString());

            
            // Various Stats formulas on ranges of numbers
            Cell avgFA = s1.getRow(2).getCell(8);
            assertNotNull(avgFA);
            assertEquals("AVERAGE(Sheet1:Sheet3!A1:B2)", avgFA.getCellFormula());
            assertEquals("27.5", evaluator.evaluate(avgFA).formatAsString());
            
            Cell minFA = s1.getRow(3).getCell(8);
            assertNotNull(minFA);
            assertEquals("MIN(Sheet1:Sheet3!A$1:B$2)", minFA.getCellFormula());
            assertEquals("11.0", evaluator.evaluate(minFA).formatAsString());
            
            Cell maxFA = s1.getRow(4).getCell(8);
            assertNotNull(maxFA);
            assertEquals("MAX(Sheet1:Sheet3!A$1:B$2)", maxFA.getCellFormula());
            assertEquals("44.0", evaluator.evaluate(maxFA).formatAsString());
            
            Cell countFA = s1.getRow(5).getCell(8);
            assertNotNull(countFA);
            assertEquals("COUNT(Sheet1:Sheet3!$A$1:$B$2)", countFA.getCellFormula());
            assertEquals("4.0", evaluator.evaluate(countFA).formatAsString());
        }
        
        wb2.close();
        wb1.close();
    }

    // bug 57721
    @Test
    public void structuredReferences() throws IOException {
        verifyAllFormulasInWorkbookCanBeEvaluated("evaluate_formula_with_structured_table_references.xlsx");
    }
    
    // bug 57840
    @Ignore("Takes over a minute to evaluate all formulas in this large workbook. Run this test when profiling for formula evaluation speed.")
    @Test
    public void testLotsOfFormulasWithStructuredReferencesToCalculatedTableColumns() throws IOException {
        verifyAllFormulasInWorkbookCanBeEvaluated("StructuredRefs-lots-with-lookups.xlsx");
    }

    // FIXME: use junit4 parameterization
    private static void verifyAllFormulasInWorkbookCanBeEvaluated(String sampleWorkbook) throws IOException {
        XSSFWorkbook wb = XSSFTestDataSamples.openSampleWorkbook(sampleWorkbook);
        XSSFFormulaEvaluator.evaluateAllFormulaCells(wb);
        wb.close();
    }

    @Test
    public void test59736() {
        Workbook wb = XSSFTestDataSamples.openSampleWorkbook("59736.xlsx");
        FormulaEvaluator evaluator = wb.getCreationHelper().createFormulaEvaluator();
        Cell cell = wb.getSheetAt(0).getRow(0).getCell(0);
        assertEquals(1, cell.getNumericCellValue(), 0.001);

        cell = wb.getSheetAt(0).getRow(1).getCell(0);
        CellValue value = evaluator.evaluate(cell);
        assertEquals(1, value.getNumberValue(), 0.001);

        cell = wb.getSheetAt(0).getRow(2).getCell(0);
        value = evaluator.evaluate(cell);
        assertEquals(1, value.getNumberValue(), 0.001);
    }
    
    @Test
    public void evaluateInCellReturnsSameDataType() throws IOException {
        XSSFWorkbook wb = new XSSFWorkbook();
        wb.createSheet().createRow(0).createCell(0);
        XSSFFormulaEvaluator evaluator = wb.getCreationHelper().createFormulaEvaluator();
        XSSFCell cell = wb.getSheetAt(0).getRow(0).getCell(0);
        XSSFCell same = evaluator.evaluateInCell(cell);
        assertSame(cell, same);
        wb.close();
    }
    
    @Test
    public void testBug61468() {
        Workbook wb = XSSFTestDataSamples.openSampleWorkbook("simple-monthly-budget.xlsx");
        FormulaEvaluator evaluator = wb.getCreationHelper().createFormulaEvaluator();
        Cell cell = wb.getSheetAt(0).getRow(8).getCell(4);
        assertEquals(3750, cell.getNumericCellValue(), 0.001);

        CellValue value = evaluator.evaluate(cell);
        assertEquals(3750, value.getNumberValue(), 0.001);
    }
    
    @Test
    public void testBug61495() {
        Workbook wb = XSSFTestDataSamples.openSampleWorkbook("61495-test.xlsm");
        FormulaEvaluator evaluator = wb.getCreationHelper().createFormulaEvaluator();
        Cell cell = wb.getSheetAt(0).getRow(0).getCell(1);
//        assertEquals("D 67.10", cell.getStringCellValue());
        
        CellValue value = evaluator.evaluate(cell);
        assertEquals("D 67.10", value.getStringValue());
        
        assertEquals("D 0,068", evaluator.evaluate(wb.getSheetAt(0).getRow(1).getCell(1)));
    }
}