main/src/test/java/org/apache/poi/ss/formula/ptg/TestExternalNameReference.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.assertNotNull;

import org.apache.poi.hssf.HSSFTestDataSamples;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFFormulaEvaluator;
import org.apache.poi.hssf.usermodel.HSSFName;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.util.CellReference;
import org.junit.jupiter.api.Test;

/**
 * Tests for proper calculation of named ranges from external workbooks.
 */
final class TestExternalNameReference {
	double MARKUP_COST_1 = 1.8d;
	double MARKUP_COST_2 = 1.5d;
	double PART_COST = 12.3d;
	double NEW_QUANT = 7.0d;
	double NEW_PART_COST = 15.3d;
	/**
	 * tests <tt>NameXPtg for external cell reference by name</tt> and logic in Workbook below that
	 */
	@Test
	void testReadCalcSheet() {
		HSSFWorkbook wb = HSSFTestDataSamples.openSampleWorkbook("XRefCalc.xls");
		HSSFName name = wb.getName("QUANT");
		assertNotNull(name);
		assertEquals("Sheet1!$A$2", name.getRefersToFormula());
		name = wb.getName("PART");
		assertNotNull(name);
		assertEquals("Sheet1!$B$2", name.getRefersToFormula());
		assertEquals("x123",wb.getSheet("Sheet1").getRow(1).getCell(1).getStringCellValue());
		name = wb.getName("UNITCOST");
		assertNotNull(name);
		assertEquals("Sheet1!$C$2", name.getRefersToFormula());
		name = wb.getName("UNITCOST");
		assertNotNull(name);
		CellReference cellRef = new CellReference(name.getRefersToFormula());
		HSSFCell cell = wb.getSheet(cellRef.getSheetName()).getRow(cellRef.getRow()).getCell(cellRef.getCol());
		assertEquals("VLOOKUP(PART,COSTS,2,FALSE)",cell.getCellFormula());
		name = wb.getName("COST");
		assertNotNull(name);
		assertEquals("Sheet1!$D$2", name.getRefersToFormula());
		name = wb.getName("COST");
		assertNotNull(name);
		cellRef = new CellReference(name.getRefersToFormula());
		cell = wb.getSheet(cellRef.getSheetName()).getRow(cellRef.getRow()).getCell(cellRef.getCol());
		assertEquals("UNITCOST*Quant",cell.getCellFormula());
		name = wb.getName("TOTALCOST");
		assertNotNull(name);
		assertEquals("Sheet1!$E$2", name.getRefersToFormula());
		name = wb.getName("TOTALCOST");
		assertNotNull(name);
		cellRef = new CellReference(name.getRefersToFormula());
		cell = wb.getSheet(cellRef.getSheetName()).getRow(cellRef.getRow()).getCell(cellRef.getCol());
		assertEquals("Cost*Markup_Cost",cell.getCellFormula());
	}

	@Test
	void testReadReferencedSheet() {
		HSSFWorkbook wb = HSSFTestDataSamples.openSampleWorkbook("XRefCalcData.xls");
		HSSFName name = wb.getName("COSTS");
		assertNotNull(name);
		assertEquals("CostSheet!$A$2:$B$3", name.getRefersToFormula());
		assertEquals("x123",wb.getSheet("CostSheet").getRow(1).getCell(0).getStringCellValue());
		assertEquals(PART_COST,wb.getSheet("CostSheet").getRow(1).getCell(1).getNumericCellValue(), 0);
		name = wb.getName("Markup_Cost");
		assertNotNull(name);
		assertEquals("MarkupSheet!$B$1", name.getRefersToFormula());
		assertEquals(MARKUP_COST_1,wb.getSheet("MarkupSheet").getRow(0).getCell(1).getNumericCellValue(), 0);
	}

	@Test
	void testEvaluate() {
		HSSFWorkbook wb = HSSFTestDataSamples.openSampleWorkbook("XRefCalc.xls");
		HSSFWorkbook wb2 = HSSFTestDataSamples.openSampleWorkbook("XRefCalcData.xls");
		HSSFName name = wb.getName("QUANT");
		assertNotNull(name);
		CellReference cellRef = new CellReference(name.getRefersToFormula());
		HSSFCell cell = wb.getSheet(cellRef.getSheetName()).getRow(cellRef.getRow()).getCell(cellRef.getCol());
		cell.setCellValue(NEW_QUANT);
		cell = wb2.getSheet("CostSheet").getRow(1).getCell(1);
		cell.setCellValue(NEW_PART_COST);
		HSSFFormulaEvaluator evaluator = new HSSFFormulaEvaluator(wb);
		HSSFFormulaEvaluator evaluatorCost = new HSSFFormulaEvaluator(wb2);
		String[] bookNames = { "XRefCalc.xls", "XRefCalcData.xls" };
		HSSFFormulaEvaluator[] evaluators = { evaluator, evaluatorCost, };
		HSSFFormulaEvaluator.setupEnvironment(bookNames, evaluators);
		name = wb.getName("UNITCOST");
		assertNotNull(name);
		cellRef = new CellReference(name.getRefersToFormula());
		HSSFCell uccell = wb.getSheet(cellRef.getSheetName()).getRow(cellRef.getRow()).getCell(cellRef.getCol());
		name = wb.getName("COST");
		assertNotNull(name);
		cellRef = new CellReference(name.getRefersToFormula());
		HSSFCell ccell = wb.getSheet(cellRef.getSheetName()).getRow(cellRef.getRow()).getCell(cellRef.getCol());
		name = wb.getName("TOTALCOST");
		assertNotNull(name);
		cellRef = new CellReference(name.getRefersToFormula());
		HSSFCell tccell = wb.getSheet(cellRef.getSheetName()).getRow(cellRef.getRow()).getCell(cellRef.getCol());
		evaluator.evaluateFormulaCell(uccell);
		evaluator.evaluateFormulaCell(ccell);
		evaluator.evaluateFormulaCell(tccell);
		assertEquals(NEW_PART_COST, uccell.getNumericCellValue(), 0);
		assertEquals(NEW_PART_COST*NEW_QUANT, ccell.getNumericCellValue(), 0);
		assertEquals(NEW_PART_COST*NEW_QUANT*MARKUP_COST_2, tccell.getNumericCellValue(), 0);
	}
}