TestFormulaEval.java

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package org.apache.poi.xssf.usermodel;

import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellType;
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.junit.jupiter.api.Test;

import java.io.IOException;

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

class TestFormulaEval {
    @Test
    void testCircularRef() throws IOException {
        try (Workbook wb = new XSSFWorkbook()) {
            Sheet sheet = wb.createSheet();
            Row row = sheet.createRow(0);
            Cell cell = row.createCell(0);
            cell.setCellFormula("A1");
            FormulaEvaluator formulaEvaluator = wb.getCreationHelper().createFormulaEvaluator();
            // the following assert should probably be NUMERIC not ERROR (from testing in Excel itself)
            assertEquals(CellType.ERROR, formulaEvaluator.evaluateFormulaCell(cell));

            cell.setCellFormula(null);
            formulaEvaluator.notifyUpdateCell(cell);
            //the following assert should probably be BLANK not ERROR
            assertEquals(CellType.ERROR, cell.getCellType());
        }
    }

    @Test
    void testCircularRef2() throws IOException {
        try (Workbook wb = new XSSFWorkbook()) {
            Sheet sheet = wb.createSheet();
            Row row = sheet.createRow(0);
            Cell cell0 = row.createCell(0);
            Cell cell1 = row.createCell(1);
            cell0.setCellFormula("B1");
            cell1.setCellFormula("A1");
            FormulaEvaluator formulaEvaluator = wb.getCreationHelper().createFormulaEvaluator();
            formulaEvaluator.evaluateAll();

            cell0.setCellFormula(null);
            cell1.setCellFormula(null);
            formulaEvaluator.notifyUpdateCell(cell0);
            formulaEvaluator.notifyUpdateCell(cell1);
            //the following asserts should probably be BLANK not ERROR
            assertEquals(CellType.ERROR, cell0.getCellType());
            assertEquals(CellType.ERROR, cell1.getCellType());
        }
    }

    @Test
    void testExceptionForWrongFormula1() throws IOException {
        try (Workbook wb = new XSSFWorkbook()) {
            Sheet sheet = wb.createSheet("test-sheet");
            Row row = sheet.createRow(0);
            Cell cell0 = row.createCell(0);
            Cell cell1 = row.createCell(1);
            cell0.setCellValue(1);
            cell1.setCellFormula("'Sheet123'!R6C13");

            FormulaEvaluator formulaEvaluator = wb.getCreationHelper().createFormulaEvaluator();
            try {
                formulaEvaluator.evaluateAll();
                fail("Should catch exception here");
            } catch (IllegalStateException e) {
                assertTrue(e.getMessage().contains("test-sheet"),
                        "Had: " + e.getMessage());
                assertTrue(e.getMessage().contains("Sheet123"),
                        "Had: " + e.getMessage());
                assertTrue(e.getMessage().contains("R6C13"),
                        "Had: " + e.getMessage());
            }
        }
    }

    @Test
    void testExceptionForWrongFormula2() throws IOException {
        try (Workbook wb = new XSSFWorkbook()) {
            Sheet sheet = wb.createSheet("test-sheet");
            Row row = sheet.createRow(0);
            Cell cell0 = row.createCell(0);
            Cell cell1 = row.createCell(1);
            cell0.setCellValue(1);
            cell1.setCellFormula("SUM('asldkjasldk ajd Sheet123'!R6C13)");

            FormulaEvaluator formulaEvaluator = wb.getCreationHelper().createFormulaEvaluator();
            try {
                formulaEvaluator.evaluateAll();
                fail("Should catch exception here");
            } catch (IllegalStateException e) {
                assertTrue(e.getMessage().contains("test-sheet"),
                        "Had: " + e.getMessage());
                assertTrue(e.getMessage().contains("Sheet123"),
                        "Had: " + e.getMessage());
                assertTrue(e.getMessage().contains("R6C13"),
                        "Had: " + e.getMessage());
                assertTrue(e.getMessage().contains("SUM"),
                        "Had: " + e.getMessage());
            }
        }
    }
}