poi/poi/src/test/java/org/apache/poi/hssf/model/TestOperandClassTransformer.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.hssf.model;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertNotEquals;
import static org.junit.jupiter.api.Assertions.assertNotNull;

import org.apache.poi.ss.formula.eval.BlankEval;
import org.apache.poi.ss.formula.eval.ErrorEval;
import org.apache.poi.ss.formula.eval.NumberEval;
import org.apache.poi.ss.formula.eval.ValueEval;
import org.apache.poi.ss.formula.functions.EvalFactory;
import org.apache.poi.ss.formula.functions.MatrixFunction;
import org.apache.poi.ss.formula.ptg.AbstractFunctionPtg;
import org.apache.poi.ss.formula.ptg.FuncVarPtg;
import org.apache.poi.ss.formula.ptg.Ptg;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;

/**
 * Tests specific formula examples in {@code OperandClassTransformer}.
 */
final class TestOperandClassTransformer {

    private static Ptg[] parseFormula(String formula) {
        Ptg[] result = HSSFFormulaParser.parse(formula, null);
        assertNotNull(result, "Ptg array should not be null");
        return result;
    }

    @Test
    void testMdeterm() {
        String formula = "MDETERM(ABS(A1))";
        Ptg[] ptgs = parseFormula(formula);

        confirmTokenClass(ptgs, 0, Ptg.CLASS_ARRAY);
        confirmFuncClass(ptgs, 1, "ABS", Ptg.CLASS_ARRAY);
        confirmFuncClass(ptgs, 2, "MDETERM", Ptg.CLASS_VALUE);
    }

    @Test
    void testMdetermReturnsValueInvalidOnABlankCell() {
        ValueEval matrixRef = EvalFactory.createAreaEval("A1:B2",
                new ValueEval[]{
                        BlankEval.instance,
                        new NumberEval(1),
                        new NumberEval(2),
                        new NumberEval(3)
                }
        );
        ValueEval result = MatrixFunction.MDETERM.evaluate(new ValueEval[]{matrixRef} , 0, 0);
        assertEquals(ErrorEval.VALUE_INVALID, result);
    }

    /**
     * In the example: {@code INDEX(PI(),1)}, Excel encodes PI() as 'array'.  It is not clear
     * what rule justifies this. POI currently encodes it as 'value' which Excel(2007) seems to
     * tolerate. Changing the metadata for INDEX to have first parameter as 'array' class breaks
     * other formulas involving INDEX.  It seems like a special case needs to be made.  Perhaps an
     * important observation is that INDEX is one of very few functions that returns 'reference' type.
     * <p>
     * This test has been added but disabled in order to document this issue.
     */
    @Test
    @Disabled
    void testIndexPi1() {
        String formula = "INDEX(PI(),1)";
        Ptg[] ptgs = parseFormula(formula);

        confirmFuncClass(ptgs, 1, "PI", Ptg.CLASS_ARRAY); // fails as of POI 3.1
        confirmFuncClass(ptgs, 2, "INDEX", Ptg.CLASS_VALUE);
    }

    /**
     * Even though count expects args of type R, because A1 is a direct operand of a
     * value operator it must get type V
     */
    @Test
    void testDirectOperandOfValueOperator() {
        String formula = "COUNT(A1*1)";
        Ptg[] ptgs = parseFormula(formula);
        assertNotEquals(Ptg.CLASS_REF, ptgs[0].getPtgClass());
        confirmTokenClass(ptgs, 0, Ptg.CLASS_VALUE);
        confirmTokenClass(ptgs, 3, Ptg.CLASS_VALUE);
    }

    /**
     * A cell ref passed to a function expecting type V should be converted to type V
     */
    @Test
    void testRtoV() {

        String formula = "lookup(A1, A3:A52, B3:B52)";
        Ptg[] ptgs = parseFormula(formula);
        confirmTokenClass(ptgs, 0, Ptg.CLASS_VALUE);
    }

    @Test
    void testComplexIRR_bug45041() {
        String formula = "(1+IRR(SUMIF(A:A,ROW(INDIRECT(MIN(A:A)&\":\"&MAX(A:A))),B:B),0))^365-1";
        Ptg[] ptgs = parseFormula(formula);

        FuncVarPtg rowFunc = (FuncVarPtg) ptgs[10];
        FuncVarPtg sumifFunc = (FuncVarPtg) ptgs[12];
        assertEquals("ROW", rowFunc.getName());
        assertEquals("SUMIF", sumifFunc.getName());

        assertNotEquals(Ptg.CLASS_VALUE, rowFunc.getPtgClass());
        assertNotEquals(Ptg.CLASS_VALUE, sumifFunc.getPtgClass());
        confirmTokenClass(ptgs, 1, Ptg.CLASS_REF);
        confirmTokenClass(ptgs, 2, Ptg.CLASS_REF);
        confirmFuncClass(ptgs, 3, "MIN", Ptg.CLASS_VALUE);
        confirmTokenClass(ptgs, 6, Ptg.CLASS_REF);
        confirmFuncClass(ptgs, 7, "MAX", Ptg.CLASS_VALUE);
        confirmFuncClass(ptgs, 9, "INDIRECT", Ptg.CLASS_REF);
        confirmFuncClass(ptgs, 10, "ROW", Ptg.CLASS_ARRAY);
        confirmTokenClass(ptgs, 11, Ptg.CLASS_REF);
        confirmFuncClass(ptgs, 12, "SUMIF", Ptg.CLASS_ARRAY);
        confirmFuncClass(ptgs, 14, "IRR", Ptg.CLASS_VALUE);
    }

    private void confirmFuncClass(Ptg[] ptgs, int i, String expectedFunctionName, byte operandClass) {
        confirmTokenClass(ptgs, i, operandClass);
        AbstractFunctionPtg afp = (AbstractFunctionPtg) ptgs[i];
        assertEquals(expectedFunctionName, afp.getName());
    }

    private void confirmTokenClass(Ptg[] ptgs, int i, byte operandClass) {
        Ptg ptg = ptgs[i];
        assertFalse(ptg.isBaseToken(), "ptg[" + i + "] is a base token");
        assertEquals(operandClass, ptg.getPtgClass());
    }
}