NPOI/test/NPOI.OpenXmlFormats/XSSF/Extractor/TestXSSFEventBasedExcelExtractor.cs

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   this work for Additional information regarding copyright ownership.
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using System;
using NUnit.Framework;
using NPOI.HSSF.Extractor;
using TestCases.HSSF;
using System.Text.RegularExpressions;
namespace NPOI.XSSF.Extractor
{
/**
 * Tests for {@link XSSFEventBasedExcelExtractor}
 */
public class TestXSSFEventBasedExcelExtractor  {
    protected XSSFEventBasedExcelExtractor GetExtractor(String sampleName) throws Exception {
        return new XSSFEventBasedExcelExtractor(XSSFTestDataSamples.
                openSamplePackage(sampleName));
    }

    /**
     * Get text out of the simple file
     */
    public void TestGetSimpleText()  {
        // a very simple file
       XSSFEventBasedExcelExtractor extractor = GetExtractor("sample.xlsx");
        extractor.GetText();
        
        String text = extractor.GetText();
        Assert.IsTrue(text.Length > 0);
        
        // Check sheet names
        Assert.IsTrue(text.startsWith("Sheet1"));
        Assert.IsTrue(text.EndsWith("Sheet3\n"));
        
        // Now without, will have text
        extractor.SetIncludeSheetNames(false);
        text = extractor.GetText();
        String CHUNK1 =
            "Lorem\t111\n" + 
            "ipsum\t222\n" + 
            "dolor\t333\n" + 
            "sit\t444\n" + 
            "amet\t555\n" + 
            "consectetuer\t666\n" + 
            "adipiscing\t777\n" + 
            "elit\t888\n" + 
            "Nunc\t999\n";
        String CHUNK2 =
            "The quick brown fox jumps over the lazy dog\n" +
            "hello, xssf	hello, xssf\n" +
            "hello, xssf	hello, xssf\n" +
            "hello, xssf	hello, xssf\n" +
            "hello, xssf	hello, xssf\n";
        Assert.AreEqual(
                CHUNK1 + 
                "at\t4995\n" + 
                CHUNK2
                , text);
        
        // Now Get formulas not their values
        extractor.SetFormulasNotResults(true);
        text = extractor.GetText();
        Assert.AreEqual(
                CHUNK1 +
                "at\tSUM(B1:B9)\n" + 
                CHUNK2, text);
        
        // With sheet names too
        extractor.SetIncludeSheetNames(true);
        text = extractor.GetText();
        Assert.AreEqual(
                "Sheet1\n" +
                CHUNK1 +
                "at\tSUM(B1:B9)\n" + 
                "rich Test\n" +
                CHUNK2 +
                "Sheet3\n"
                , text);
        
        extractor.Close();
    }
    
    public void TestGetComplexText()  {
        // A fairly complex file
       XSSFEventBasedExcelExtractor extractor = GetExtractor("AverageTaxRates.xlsx");
        extractor.GetText();
        
        String text = extractor.GetText();
        Assert.IsTrue(text.Length > 0);
        
        // Might not have all formatting it should do!
        Assert.IsTrue(text.startsWith(
                        "Avgtxfull\n" +
                        "(iii) AVERAGE TAX RATES ON ANNUAL"	
        ));
        
        extractor.Close();
    }
    
   public void TestInlineStrings(){
      XSSFEventBasedExcelExtractor extractor = GetExtractor("InlineStrings.xlsx");
      extractor.SetFormulasNotResults(true);
      String text = extractor.GetText();

      // Numbers
      Assert.IsTrue("Unable to find expected word in text\n" + text, text.Contains("43"));
      Assert.IsTrue("Unable to find expected word in text\n" + text, text.Contains("22"));
      
      // Strings
      Assert.IsTrue("Unable to find expected word in text\n" + text, text.Contains("ABCDE"));
      Assert.IsTrue("Unable to find expected word in text\n" + text, text.Contains("Long Text"));
      
      // Inline Strings
      Assert.IsTrue("Unable to find expected word in text\n" + text, text.Contains("1st Inline String"));
      Assert.IsTrue("Unable to find expected word in text\n" + text, text.Contains("And More"));
      
      // Formulas
      Assert.IsTrue("Unable to find expected word in text\n" + text, text.Contains("A2"));
      Assert.IsTrue("Unable to find expected word in text\n" + text, text.Contains("A5-A$2"));
        
      extractor.Close();
   }
   
    /**
     * Test that we return pretty much the same as
     *  ExcelExtractor does, when we're both passed
     *  the same file, just saved as xls and xlsx
     */
    public void TestComparedToOLE2() {
        // A fairly simple file - ooxml
       XSSFEventBasedExcelExtractor ooxmlExtractor = GetExtractor("SampleSS.xlsx");

        ExcelExtractor ole2Extractor =
            new ExcelExtractor(HSSFTestDataSamples.OpenSampleWorkbook("SampleSS.xls"));
        
        POITextExtractor[] extractors =
            new POITextExtractor[] { ooxmlExtractor, ole2Extractor };
        for (int i = 0; i < extractors.Length; i++) {
            POITextExtractor extractor = extractors[i];
            
            String text = extractor.GetText().ReplaceAll("[\r\t]", "");
            Assert.IsTrue(text.startsWith("First Sheet\nTest spreadsheet\n2nd row2nd row 2nd column\n"));
            Pattern pattern = Pattern.compile(".*13(\\.0+)?\\s+Sheet3.*", Pattern.DOTALL);
            Matcher m = pattern.matcher(text);
            Assert.IsTrue(m.matches());			
        }
        
        ole2Extractor.Close();
        ooxmlExtractor.Close();
    }
}

}