TestFuncVarPtg.java

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   this work for additional information regarding copyright ownership.
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package org.apache.poi.ss.formula.ptg;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.fail;

import org.apache.poi.hssf.model.HSSFFormulaParser;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.junit.jupiter.api.Test;

final class TestFuncVarPtg {

    /**
     * The first fix for bugzilla 44675 broke the encoding of SUM formulas (and probably others).
     * The operand classes of the parameters to SUM() should be coerced to 'reference' not 'value'.
     * In the case of SUM, Excel evaluates the formula to '#VALUE!' if a parameter operand class is
     * wrong.  In other cases Excel seems to tolerate bad operand classes.<p>
     *
     * This functionality is related to the setParameterRVA() methods of {@code FormulaParser}
     */
    @Test
    void testOperandClass() {
        HSSFWorkbook book = new HSSFWorkbook();
        Ptg[] ptgs = HSSFFormulaParser.parse("sum(A1:A2)", book);
        assertEquals(2, ptgs.length);
        assertEquals(AreaPtg.class, ptgs[0].getClass());

        switch(ptgs[0].getPtgClass()) {
            case Ptg.CLASS_REF:
                // correct behaviour
                break;
            case Ptg.CLASS_VALUE:
                fail("Identified bug 44675b");
                break;
            default:
                fail("Unexpected operand class");
                break;
        }
    }
}