trunk/src/scratchpad/testcases/org/apache/poi/hslf/model/TestTextRunReWrite.java

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   this work for additional information regarding copyright ownership.
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package org.apache.poi.hslf.model;

import static org.junit.Assert.assertEquals;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.util.List;

import org.apache.poi.POIDataSamples;
import org.apache.poi.hslf.usermodel.*;
import org.apache.poi.poifs.filesystem.DocumentEntry;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
import org.junit.Before;
import org.junit.Test;

/**
 * Tests that if we load something up, get a TextRun, set the text
 *  to be the same as it was before, and write it all back out again,
 *  that we don't break anything in the process.
 *
 * @author Nick Burch (nick at torchbox dot com)
 */
public final class TestTextRunReWrite {
	// HSLFSlideShow primed on the test data
	private HSLFSlideShowImpl hss;
	// HSLFSlideShow primed on the test data
	private HSLFSlideShow ss;
	// POIFS primed on the test data
	private POIFSFileSystem pfs;

	/**
	 * Load up a test PPT file with rich data
	 */
	@Before
    public void setUp() throws Exception {
        POIDataSamples slTests = POIDataSamples.getSlideShowInstance();
		String filename = "Single_Coloured_Page_With_Fonts_and_Alignments.ppt";
		pfs = new POIFSFileSystem(slTests.openResourceAsStream(filename));
		hss = new HSLFSlideShowImpl(pfs);
		ss = new HSLFSlideShow(hss);
    }

    @Test
	public void testWritesOutTheSameNonRich() throws Exception {
    	// Ensure the text lengths are as we'd expect to start with
    	assertEquals(1, ss.getSlides().size());
    	assertEquals(2, ss.getSlides().get(0).getTextParagraphs().size());

        // Grab the first text run on the first sheet
        List<HSLFTextParagraph> tr1 = ss.getSlides().get(0).getTextParagraphs().get(0);
        List<HSLFTextParagraph> tr2 = ss.getSlides().get(0).getTextParagraphs().get(1);
    	
    	
    	assertEquals(30, HSLFTextParagraph.getRawText(tr1).length());
    	assertEquals(179, HSLFTextParagraph.getRawText(tr2).length());

    	assertEquals(1, tr1.size());
    	assertEquals(30, HSLFTextParagraph.getText(tr1).length());
    	assertEquals(30, HSLFTextParagraph.getRawText(tr1).length());
    	assertEquals(31, tr1.get(0).getTextRuns().get(0).getCharacterStyle().getCharactersCovered());
    	assertEquals(31, tr1.get(0).getParagraphStyle().getCharactersCovered());

    	// Set the text to be as it is now
    	HSLFTextParagraph.setText(tr1, HSLFTextParagraph.getRawText(tr1));
    	tr1 = ss.getSlides().get(0).getTextParagraphs().get(0);

    	// Check the text lengths are still right
    	assertEquals(30, HSLFTextParagraph.getRawText(tr1).length());
    	assertEquals(179, HSLFTextParagraph.getRawText(tr2).length());

        assertEquals(1, tr1.size());
        assertEquals(30, HSLFTextParagraph.getText(tr1).length());
        assertEquals(30, HSLFTextParagraph.getRawText(tr1).length());
        assertEquals(31, tr1.get(0).getTextRuns().get(0).getCharacterStyle().getCharactersCovered());
        assertEquals(31, tr1.get(0).getParagraphStyle().getCharactersCovered());


		// Write the slideshow out to a byte array
		ByteArrayOutputStream baos = new ByteArrayOutputStream();
		ss.write(baos);

		// Build an input stream of it
		ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());

		// Use POIFS to query that lot
		POIFSFileSystem npfs = new POIFSFileSystem(bais);

		// Check that the "PowerPoint Document" sections have the same size
		DocumentEntry oProps = (DocumentEntry)pfs.getRoot().getEntry("PowerPoint Document");
		DocumentEntry nProps = (DocumentEntry)npfs.getRoot().getEntry("PowerPoint Document");
		assertEquals(oProps.getSize(),nProps.getSize());

		// Check that they contain the same data
		byte[] _oData = new byte[oProps.getSize()];
		byte[] _nData = new byte[nProps.getSize()];
		pfs.createDocumentInputStream("PowerPoint Document").read(_oData);
		npfs.createDocumentInputStream("PowerPoint Document").read(_nData);
		for(int i=0; i<_oData.length; i++) {
//			System.out.println(i + "\t" + Integer.toHexString(i));
			assertEquals(_oData[i], _nData[i]);
		}
	}

    @Test
    public void testWritesOutTheSameRich() throws Exception {
    	// Grab the first text run on the first sheet
    	List<HSLFTextParagraph> tr1 = ss.getSlides().get(0).getTextParagraphs().get(0);

    	// Get the first rich text run
    	HSLFTextRun rtr1 = tr1.get(0).getTextRuns().get(0);


    	// Check that the text sizes are as expected
    	assertEquals(1, tr1.get(0).getTextRuns().size());
        assertEquals(30, HSLFTextParagraph.getRawText(tr1).length());
    	assertEquals(30, rtr1.getLength());
    	assertEquals(30, rtr1.getRawText().length());
    	assertEquals(31, rtr1.getCharacterStyle().getCharactersCovered());
    	assertEquals(31, tr1.get(0).getParagraphStyle().getCharactersCovered());

    	// Set the text to be as it is now
    	rtr1.setText( rtr1.getRawText() );
    	rtr1 = tr1.get(0).getTextRuns().get(0);

    	// Check that the text sizes are still as expected
    	assertEquals(1, tr1.get(0).getTextRuns().size());
    	assertEquals(30, HSLFTextParagraph.getRawText(tr1).length());
    	assertEquals(30, tr1.get(0).getTextRuns().get(0).getRawText().length());
    	assertEquals(30, rtr1.getLength());
    	assertEquals(30, rtr1.getRawText().length());
    	assertEquals(31, rtr1.getCharacterStyle().getCharactersCovered());
    	assertEquals(31, tr1.get(0).getParagraphStyle().getCharactersCovered());


		// Write the slideshow out to a byte array
		ByteArrayOutputStream baos = new ByteArrayOutputStream();
		ss.write(baos);

		// Build an input stream of it
		ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());

		// Use POIFS to query that lot
		POIFSFileSystem npfs = new POIFSFileSystem(bais);

		// Check that the "PowerPoint Document" sections have the same size
		DocumentEntry oProps = (DocumentEntry)pfs.getRoot().getEntry("PowerPoint Document");
		DocumentEntry nProps = (DocumentEntry)npfs.getRoot().getEntry("PowerPoint Document");
		assertEquals(oProps.getSize(),nProps.getSize());

		// Check that they contain the same data
		byte[] _oData = new byte[oProps.getSize()];
		byte[] _nData = new byte[nProps.getSize()];
		pfs.createDocumentInputStream("PowerPoint Document").read(_oData);
		npfs.createDocumentInputStream("PowerPoint Document").read(_nData);
		for(int i=0; i<_oData.length; i++) {
//			System.out.println(i + "\t" + Integer.toHexString(i) + "\t" + _oData[i]);
			assertEquals(_oData[i], _nData[i]);
		}
	}
}