poi/src/scratchpad/testcases/org/apache/poi/hssf/converter/TestExcelConverterSuite.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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package org.apache.poi.hssf.converter;

import org.apache.poi.POIDataSamples;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.util.XMLHelper;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;

import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import java.io.File;
import java.io.FilenameFilter;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import static org.junit.Assert.assertNotNull;

@RunWith(Parameterized.class)
public class TestExcelConverterSuite
{
    /**
     * YK: a quick hack to exclude failing documents from the suite.
     */
    @SuppressWarnings("ArraysAsListWithZeroOrOneArgument")
    private static List<String> failingFiles = Arrays.asList(
            /* not failing, but requires more memory */
            "ex45698-22488.xls" );

    @Parameterized.Parameters(name="{index}: {0}")
    public static Iterable<Object[]> files() {
        List<Object[]> files = new ArrayList<Object[]>();
        File directory = POIDataSamples.getDocumentInstance().getFile(
                "../spreadsheet" );
        for ( final File child : directory.listFiles( new FilenameFilter()
        {
            public boolean accept( File dir, String name )
            {
                return name.endsWith( ".xls" ) && !failingFiles.contains( name );
            }
        } ) )
        {
            files.add(new Object[] { child });
        }

        return files;
    }


    @Parameterized.Parameter
    public File child;

    @Test
    public void testFo() throws Exception
    {
        HSSFWorkbook workbook;
        try {
            workbook = ExcelToHtmlUtils.loadXls( child );
        } catch ( Exception exc ) {
            // unable to parse file -- not ExcelToFoConverter fault
            return;
        }

        ExcelToHtmlConverter excelToHtmlConverter = new ExcelToHtmlConverter(
                XMLHelper.getDocumentBuilderFactory().newDocumentBuilder().newDocument() );
        excelToHtmlConverter.processWorkbook( workbook );

        StringWriter stringWriter = new StringWriter();

        Transformer transformer = TransformerFactory.newInstance()
                .newTransformer();
        transformer.setOutputProperty( OutputKeys.ENCODING, "utf-8" );
        transformer.setOutputProperty( OutputKeys.INDENT, "yes" );
        transformer.setOutputProperty( OutputKeys.METHOD, "xml" );
        transformer.transform(
                new DOMSource( excelToHtmlConverter.getDocument() ),
                new StreamResult( stringWriter ) );

        assertNotNull(stringWriter.toString());
    }

    @Test
    public void testHtml() throws Exception
    {
        HSSFWorkbook workbook;
        try {
            workbook = ExcelToHtmlUtils.loadXls( child );
        } catch ( Exception exc ) {
            // unable to parse file -- not ExcelToFoConverter fault
            return;
        }

        ExcelToHtmlConverter excelToHtmlConverter = new ExcelToHtmlConverter(
                XMLHelper.getDocumentBuilderFactory().newDocumentBuilder().newDocument() );
        excelToHtmlConverter.processWorkbook( workbook );

        StringWriter stringWriter = new StringWriter();

        Transformer transformer = TransformerFactory.newInstance()
                .newTransformer();
        transformer.setOutputProperty( OutputKeys.ENCODING, "utf-8" );
        transformer.setOutputProperty( OutputKeys.INDENT, "no" );
        transformer.setOutputProperty( OutputKeys.METHOD, "html" );
        transformer.transform(
                new DOMSource( excelToHtmlConverter.getDocument() ),
                new StreamResult( stringWriter ) );

        assertNotNull(stringWriter.toString());
    }
}