log4j/src/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
   (the "License"); you may not use this file except in compliance with
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       http://www.apache.org/licenses/LICENSE-2.0

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   distributed under the License is distributed on an "AS IS" BASIS,
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package org.apache.poi.hdgf.streams;

import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNotNull;

import java.io.IOException;
import java.io.InputStream;

import org.apache.poi.POIDataSamples;
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.POIFSFileSystem;
import org.apache.poi.util.IOUtils;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

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

	@BeforeEach
    void setUp() throws IOException {
		ptrFactory = new PointerFactory(11);
		chunkFactory = new ChunkFactory(11);

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

		// Grab the document stream
		try (InputStream is2 = filesystem.createDocumentInputStream("VisioDocument")) {
			contents = IOUtils.toByteArray(is2);
		}
	}

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

	@SuppressWarnings("unused")
    void TOIMPLEMENTtestGetCertainChunks() {
		int offsetA = 3708;
		int offsetB = 3744;
	}

	@Test
    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 (Pointer ptr : ptrs) {
			Stream.createStream(ptr, contents, chunkFactory, ptrFactory);
		}

		// Get with recursing into chunks
		for (Pointer ptr : ptrs) {
			Stream stream = Stream.createStream(ptr, contents, chunkFactory, ptrFactory);
			if(stream instanceof ChunkStream) {
				ChunkStream cStream = (ChunkStream)stream;
				assertDoesNotThrow(cStream::findChunks);
			}
		}

		// Get with recursing into chunks and pointers
		for (Pointer ptr : ptrs) {
			Stream stream = Stream.createStream(ptr, contents, chunkFactory, ptrFactory);
			if(stream instanceof PointerContainingStream) {
				PointerContainingStream pStream = (PointerContainingStream)stream;
				assertDoesNotThrow(() -> pStream.findChildren(contents));
			}
		}

		trailer.findChildren(contents);
	}

	@Test
    void testOpen() throws IOException {
		try (HDGFDiagram dia = new HDGFDiagram(filesystem)) {
			assertEquals(20, dia.getTopLevelStreams().length);
		}
	}
}