trunk/src/testcases/org/apache/poi/hssf/model/TestRVA.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
   (the "License"); you may not use this file except in compliance with
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   distributed under the License is distributed on an "AS IS" BASIS,
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package org.apache.poi.hssf.model;

import static org.junit.Assert.assertFalse;
import static org.junit.Assert.fail;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

import org.apache.poi.hssf.HSSFTestDataSamples;
import org.apache.poi.hssf.usermodel.FormulaExtractor;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.poifs.filesystem.NPOIFSFileSystem;
import org.apache.poi.ss.formula.ptg.AttrPtg;
import org.apache.poi.ss.formula.ptg.Ptg;
import org.apache.poi.ss.usermodel.CellType;
import org.junit.AfterClass;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameter;
import org.junit.runners.Parameterized.Parameters;

/**
 * Tests 'operand class' transformation performed by
 * <tt>OperandClassTransformer</tt> by comparing its results with those
 * directly produced by Excel (in a sample spreadsheet).
 */
@RunWith(Parameterized.class)
public final class TestRVA {

	private static final String NEW_LINE = System.getProperty("line.separator");
	private static NPOIFSFileSystem poifs;
    private static HSSFWorkbook workbook;
    private static HSSFSheet sheet;

	
    @Parameter(value = 0)
    public HSSFCell formulaCell;
    @Parameter(value = 1)
    public String formula;

    @AfterClass
    public static void closeResource() throws Exception {
        workbook.close();
        poifs.close();
    }

    @Parameters(name="{1}")
    public static Collection<Object[]> data() throws Exception {
        poifs = new NPOIFSFileSystem(HSSFTestDataSamples.getSampleFile("testRVA.xls"), true);
        workbook = new HSSFWorkbook(poifs);
        sheet = workbook.getSheetAt(0);

        List<Object[]> data = new ArrayList<Object[]>(); 
        
        for (int rowIdx = 0; true; rowIdx++) {
            HSSFRow row = sheet.getRow(rowIdx);
            if (row == null) {
                break;
            }
            HSSFCell cell = row.getCell(0);
            if (cell == null || cell.getCellTypeEnum() == CellType.BLANK) {
                break;
            }

            String formula = cell.getCellFormula();
            data.add(new Object[]{cell,formula});
        }
        
        return data;
    }
	
    @Test
	public void confirmCell() {
		Ptg[] excelPtgs = FormulaExtractor.getPtgs(formulaCell);
		Ptg[] poiPtgs = HSSFFormulaParser.parse(formula, workbook);
		int nExcelTokens = excelPtgs.length;
		int nPoiTokens = poiPtgs.length;
		if (nExcelTokens != nPoiTokens) {
			if (nExcelTokens == nPoiTokens + 1 && excelPtgs[0].getClass() == AttrPtg.class) {
				// compensate for missing tAttrVolatile, which belongs in any formula 
				// involving OFFSET() et al. POI currently does not insert where required
				Ptg[] temp = new Ptg[nExcelTokens];
				temp[0] = excelPtgs[0];
				System.arraycopy(poiPtgs, 0, temp, 1, nPoiTokens);
				poiPtgs = temp;
			} else {
				fail("Expected " + nExcelTokens + " tokens but got " + nPoiTokens);
			}
		}
		boolean hasMismatch = false;
		StringBuffer sb = new StringBuffer();
		for (int i = 0; i < nExcelTokens; i++) {
			Ptg poiPtg = poiPtgs[i];
			Ptg excelPtg = excelPtgs[i];
			if (excelPtg.getClass() != poiPtg.getClass()) {
				hasMismatch = true;
				sb.append("  mismatch token type[" + i + "] " + getShortClassName(excelPtg) + " "
						+ excelPtg.getRVAType() + " - " + getShortClassName(poiPtg) + " "
						+ poiPtg.getRVAType());
				sb.append(NEW_LINE);
				continue;
			}
			if (poiPtg.isBaseToken()) {
				continue;
			}
			sb.append("  token[" + i + "] " + excelPtg.toString() + " "
					+ excelPtg.getRVAType());

			if (excelPtg.getPtgClass() != poiPtg.getPtgClass()) {
				hasMismatch = true;
				sb.append(" - was " + poiPtg.getRVAType());
			}
			sb.append(NEW_LINE);
		}
//		if (false) { // set 'true' to see trace of RVA values
//			System.out.println(formulaCell.getRowIndex() + " " + formula);
//			System.out.println(sb.toString());
//		}
		assertFalse(hasMismatch);
	}

	private String getShortClassName(Object o) {
		String cn = o.getClass().getName();
		int pos = cn.lastIndexOf('.');
		return cn.substring(pos + 1);
	}
}