poi-scratchpad/src/test/java/org/apache/poi/hdgf/extractor/TestVisioExtractor.java

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   contributor license agreements.  See the NOTICE file distributed with
   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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   See the License for the specific language governing permissions and
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package org.apache.poi.hdgf.extractor;

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.poifs.filesystem.POIFSFileSystem;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;

public final class TestVisioExtractor {
    private static final POIDataSamples _dgTests = POIDataSamples.getDiagramInstance();

	private final String defFilename = "Test_Visio-Some_Random_Text.vsd";
	private final int defTextChunks = 5;

	/**
	 * Test the 3 different ways of creating one
	 */
	@Test
	void testCreation() throws IOException {
		try (VisioTextExtractor extractor1 = openExtractor(defFilename)) {
			assertNotNull(extractor1);
			assertNotNull(extractor1.getAllText());
			assertEquals(defTextChunks, extractor1.getAllText().length);
		}

		try (InputStream is2 = _dgTests.openResourceAsStream(defFilename);
			 POIFSFileSystem poifs2 = new POIFSFileSystem(is2);
			 VisioTextExtractor extractor2 = new VisioTextExtractor(poifs2)) {
			assertNotNull(extractor2);
			assertNotNull(extractor2.getAllText());
			assertEquals(defTextChunks, extractor2.getAllText().length);
		}

        try (InputStream is3 = _dgTests.openResourceAsStream(defFilename);
			 POIFSFileSystem poifs3 = new POIFSFileSystem(is3);
			 HDGFDiagram hdgf3 = new HDGFDiagram(poifs3);
			 VisioTextExtractor extractor3 = new VisioTextExtractor(hdgf3)) {
			assertNotNull(extractor3);
			assertNotNull(extractor3.getAllText());
			assertEquals(defTextChunks, extractor3.getAllText().length);
		}
	}

    @Test
	void testExtraction() throws Exception {
		try (VisioTextExtractor extractor = openExtractor(defFilename)) {

			// Check the array fetch
			String[] text = extractor.getAllText();
			assertNotNull(text);
			assertEquals(defTextChunks, text.length);

			assertEquals("text\n", text[0]);
			assertEquals("View\n", text[1]);
			assertEquals("Test View\n", text[2]);
			assertEquals("I am a test view\n", text[3]);
			assertEquals("Some random text, on a page\n", text[4]);

			// And the all-in fetch
			String textS = extractor.getText();
			assertEquals("text\nView\nTest View\nI am a test view\nSome random text, on a page\n", textS);
		}
	}

    @ParameterizedTest
	@ValueSource(strings = {
		"44594.vsd", "44594-2.vsd",
		"ShortChunk1.vsd", "ShortChunk2.vsd", "ShortChunk3.vsd",
		"NegativeChunkLength.vsd", "NegativeChunkLength2.vsd"
	})
	void testProblemFiles(String file) throws Exception {
		try (VisioTextExtractor ex = openExtractor(file)) {
			assertNotNull(ex.getText());
		}
	}

    private VisioTextExtractor openExtractor(String fileName) throws IOException {
        try (InputStream is = _dgTests.openResourceAsStream(fileName)) {
            return new VisioTextExtractor(is);
        }
    }
}