/ppt/scratchpad/testcases/org/apache/poi/hdgf/streams/TestStreamBugs.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
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package org.apache.poi.hdgf.streams;

import java.io.InputStream;

import org.apache.poi.hdgf.HDGFDiagram;
import org.apache.poi.hdgf.chunks.ChunkFactory;
import org.apache.poi.hdgf.pointers.Pointer;
import org.apache.poi.hdgf.pointers.PointerFactory;
import org.apache.poi.poifs.filesystem.DocumentEntry;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
import org.apache.poi.POIDataSamples;

/**
 * Tests for bugs with streams
 */
public final class TestStreamBugs extends StreamTest {
	private byte[] contents;
	private ChunkFactory chunkFactory;
	private PointerFactory ptrFactory;
	private POIFSFileSystem filesystem;

	protected void setUp() throws Exception {
		ptrFactory = new PointerFactory(11);
		chunkFactory = new ChunkFactory(11);

        InputStream is = POIDataSamples.getDiagramInstance().openResourceAsStream("44594.vsd");
        filesystem = new POIFSFileSystem(is);

		DocumentEntry docProps =
			(DocumentEntry)filesystem.getRoot().getEntry("VisioDocument");

		// Grab the document stream
		contents = new byte[docProps.getSize()];
		filesystem.createDocumentInputStream("VisioDocument").read(contents);
	}

	public void testGetTrailer() {
		Pointer trailerPointer = ptrFactory.createPointer(contents, 0x24);
		Stream.createStream(trailerPointer, contents, chunkFactory, ptrFactory);
	}

	public void TOIMPLEMENTtestGetCertainChunks() {
		int offsetA = 3708;
		int offsetB = 3744;
	}

	public void testGetChildren() {
		Pointer trailerPointer = ptrFactory.createPointer(contents, 0x24);
		TrailerStream trailer = (TrailerStream)
			Stream.createStream(trailerPointer, contents, chunkFactory, ptrFactory);

		// Get without recursing
		Pointer[] ptrs = trailer.getChildPointers();
		for(int i=0; i<ptrs.length; i++) {
			Stream.createStream(ptrs[i], contents, chunkFactory, ptrFactory);
		}

		// Get with recursing into chunks
		for(int i=0; i<ptrs.length; i++) {
			Stream stream =
				Stream.createStream(ptrs[i], contents, chunkFactory, ptrFactory);
			if(stream instanceof ChunkStream) {
				ChunkStream cStream = (ChunkStream)stream;
				cStream.findChunks();
			}
		}

		// Get with recursing into chunks and pointers
		for(int i=0; i<ptrs.length; i++) {
			Stream stream =
				Stream.createStream(ptrs[i], contents, chunkFactory, ptrFactory);
			if(stream instanceof PointerContainingStream) {
				PointerContainingStream pStream =
					(PointerContainingStream)stream;
				pStream.findChildren(contents);
			}
		}

		trailer.findChildren(contents);
	}

	public void testOpen() throws Exception {
		HDGFDiagram dg = new HDGFDiagram(filesystem);
	}
}