convert tabs to spaces

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1890125 13f79535-47bb-0310-9956-ffa450edef68

14 files changed, 540 insertions, 540 deletions

diff --git a/poi-integration/src/test/java/org/apache/poi/stress/AbstractFileHandler.java b/poi-integration/src/test/java/org/apache/poi/stress/AbstractFileHandler.java
index 01a4ebc82d..cf84ea636d 100644
--- a/poi-integration/src/test/java/org/apache/poi/stress/AbstractFileHandler.java
+++ b/poi-integration/src/test/java/org/apache/poi/stress/AbstractFileHandler.java
@@ -46,7 +46,7 @@ public abstract class AbstractFileHandler implements FileHandler {
     public static final Set<String> EXPECTED_EXTRACTOR_FAILURES = new HashSet<>();
     static {
         // password protected files without password
-    	// ... currently none ...
+        // ... currently none ...
 
         // unsupported file-types, no supported OLE2 parts
         EXPECTED_EXTRACTOR_FAILURES.add("hmef/quick-winmail.dat");
@@ -75,9 +75,9 @@ public abstract class AbstractFileHandler implements FileHandler {
         /* Did fail for some documents with special XML contents...
         try {
             OOXMLPrettyPrint.main(new String[] { file.getAbsolutePath(),
-            		"/tmp/pretty-" + file.getName() });
+                    "/tmp/pretty-" + file.getName() });
         } catch (ZipException e) {
-        	// ignore, not a Zip/OOXML file
+            // ignore, not a Zip/OOXML file
         }*/
     }
 
diff --git a/poi-integration/src/test/java/org/apache/poi/stress/BaseIntegrationTest.java b/poi-integration/src/test/java/org/apache/poi/stress/BaseIntegrationTest.java
index 5d63d1f5a1..47a80d198b 100644
--- a/poi-integration/src/test/java/org/apache/poi/stress/BaseIntegrationTest.java
+++ b/poi-integration/src/test/java/org/apache/poi/stress/BaseIntegrationTest.java
@@ -38,128 +38,128 @@ import org.apache.poi.poifs.filesystem.OfficeXmlFileException;
  *
  */
 public class BaseIntegrationTest {
-	private final File rootDir;
-	private final String file;
-	private FileHandler handler;
-
-	public BaseIntegrationTest(File rootDir, String file, FileHandler handler) {
-		this.rootDir = rootDir;
-		this.file = file;
-		this.handler = handler;
-	}
-
-	/**
-	 * Keep this public so it can be used by the regression-tests
-	 */
-	public void test() throws Exception {
+    private final File rootDir;
+    private final String file;
+    private FileHandler handler;
+
+    public BaseIntegrationTest(File rootDir, String file, FileHandler handler) {
+        this.rootDir = rootDir;
+        this.file = file;
+        this.handler = handler;
+    }
+
+    /**
+     * Keep this public so it can be used by the regression-tests
+     */
+    public void test() throws Exception {
         assertNotNull( handler, "Unknown file extension for file: " + file );
-		testOneFile(new File(rootDir, file));
-	}
-
-	protected void testOneFile(File inputFile) throws Exception {
-		try {
-			handleFile(inputFile);
-		} catch (OfficeXmlFileException e) {
-			// switch XWPF and HWPF and so forth depending on the error message
-			handleWrongOLE2XMLExtension(inputFile, e);
-		} catch (OldFileFormatException e) {
-			// Not even text extraction is supported for these: handler.handleExtracting(inputFile);
-			assumeFalse( true, "File " + file + " excluded because it is an unsupported old format" );
-		} catch (EncryptedDocumentException e) {
-			// Do not try to read encrypted files
-			assumeFalse( true, "File " + file + " excluded because it is password-encrypted" );
-		} catch (ZipException e) {
-			// some files are corrupted
-			if (e.getMessage().equals("unexpected EOF") || e.getMessage().equals("Truncated ZIP file")) {
-				assumeFalse( true, "File " + file + " excluded because the Zip file is incomplete" );
-			}
-
-			throw e;
-		} catch (IOException e) {
-			// ignore some other ways of corrupted files
-			String message = e.getMessage();
-			if(message != null && message.contains("Truncated ZIP file")) {
-				assumeFalse( true, "File " + file + " excluded because the Zip file is incomplete" );
-			}
-
-			// sometimes binary format has XML-format-extension...
-			if(message != null && message.contains("rong file format or file extension for OO XML file")) {
-				handleWrongOLE2XMLExtension(inputFile, e);
-				return;
-			}
-
-			throw e;
-		} catch (IllegalArgumentException e) {
-			// ignore errors for documents with incorrect extension
-			String message = e.getMessage();
-			if(message != null && (message.equals("The document is really a RTF file") ||
-					message.equals("The document is really a PDF file") ||
-					message.equals("The document is really a HTML file"))) {
-				assumeFalse( true, "File " + file + " excluded because it is actually a PDF/RTF/HTML file" );
-			}
-
-			if(message != null && message.equals("The document is really a OOXML file")) {
-				handleWrongOLE2XMLExtension(inputFile, e);
-				return;
-			}
-
-			throw e;
-		}
-
-		try {
-			handler.handleExtracting(inputFile);
-		} catch (EncryptedDocumentException e) {
-			// Do not try to read encrypted files
-			assumeFalse( true, "File " + file + " excluded because it is password-encrypted" );
-		}
-	}
+        testOneFile(new File(rootDir, file));
+    }
+
+    protected void testOneFile(File inputFile) throws Exception {
+        try {
+            handleFile(inputFile);
+        } catch (OfficeXmlFileException e) {
+            // switch XWPF and HWPF and so forth depending on the error message
+            handleWrongOLE2XMLExtension(inputFile, e);
+        } catch (OldFileFormatException e) {
+            // Not even text extraction is supported for these: handler.handleExtracting(inputFile);
+            assumeFalse( true, "File " + file + " excluded because it is an unsupported old format" );
+        } catch (EncryptedDocumentException e) {
+            // Do not try to read encrypted files
+            assumeFalse( true, "File " + file + " excluded because it is password-encrypted" );
+        } catch (ZipException e) {
+            // some files are corrupted
+            if (e.getMessage().equals("unexpected EOF") || e.getMessage().equals("Truncated ZIP file")) {
+                assumeFalse( true, "File " + file + " excluded because the Zip file is incomplete" );
+            }
+
+            throw e;
+        } catch (IOException e) {
+            // ignore some other ways of corrupted files
+            String message = e.getMessage();
+            if(message != null && message.contains("Truncated ZIP file")) {
+                assumeFalse( true, "File " + file + " excluded because the Zip file is incomplete" );
+            }
+
+            // sometimes binary format has XML-format-extension...
+            if(message != null && message.contains("rong file format or file extension for OO XML file")) {
+                handleWrongOLE2XMLExtension(inputFile, e);
+                return;
+            }
+
+            throw e;
+        } catch (IllegalArgumentException e) {
+            // ignore errors for documents with incorrect extension
+            String message = e.getMessage();
+            if(message != null && (message.equals("The document is really a RTF file") ||
+                    message.equals("The document is really a PDF file") ||
+                    message.equals("The document is really a HTML file"))) {
+                assumeFalse( true, "File " + file + " excluded because it is actually a PDF/RTF/HTML file" );
+            }
+
+            if(message != null && message.equals("The document is really a OOXML file")) {
+                handleWrongOLE2XMLExtension(inputFile, e);
+                return;
+            }
+
+            throw e;
+        }
+
+        try {
+            handler.handleExtracting(inputFile);
+        } catch (EncryptedDocumentException e) {
+            // Do not try to read encrypted files
+            assumeFalse( true, "File " + file + " excluded because it is password-encrypted" );
+        }
+    }
 
     void handleWrongOLE2XMLExtension(File inputFile, Exception e) throws Exception {
-		// we sometimes have wrong extensions, so for some exceptions we try to handle it
-		// with the correct FileHandler instead
-		String message = e.getMessage();
-
-		// ignore some file-types that we do not want to handle here
-		assumeFalse( message != null && (message.equals("The document is really a RTF file") ||
-					message.equals("The document is really a PDF file") ||
-					message.equals("The document is really a HTML file")), "File " + file + " excluded because it is actually a PDF/RTF/HTML file" );
-
-		if(message != null && (message.equals("The document is really a XLS file"))) {
-			handler = new HSSFFileHandler();
-		} else if(message != null && (message.equals("The document is really a PPT file"))) {
-			handler = new HSLFFileHandler();
-		} else if(message != null && (message.equals("The document is really a DOC file"))) {
-			handler = new HWPFFileHandler();
-		} else if(message != null && (message.equals("The document is really a VSD file"))) {
-			handler = new HDGFFileHandler();
-
-		// use XWPF instead of HWPF and XSSF instead of HSSF as the file seems to have the wrong extension
-		} else if (handler instanceof HWPFFileHandler) {
+        // we sometimes have wrong extensions, so for some exceptions we try to handle it
+        // with the correct FileHandler instead
+        String message = e.getMessage();
+
+        // ignore some file-types that we do not want to handle here
+        assumeFalse( message != null && (message.equals("The document is really a RTF file") ||
+                    message.equals("The document is really a PDF file") ||
+                    message.equals("The document is really a HTML file")), "File " + file + " excluded because it is actually a PDF/RTF/HTML file" );
+
+        if(message != null && (message.equals("The document is really a XLS file"))) {
+            handler = new HSSFFileHandler();
+        } else if(message != null && (message.equals("The document is really a PPT file"))) {
+            handler = new HSLFFileHandler();
+        } else if(message != null && (message.equals("The document is really a DOC file"))) {
+            handler = new HWPFFileHandler();
+        } else if(message != null && (message.equals("The document is really a VSD file"))) {
+            handler = new HDGFFileHandler();
+
+        // use XWPF instead of HWPF and XSSF instead of HSSF as the file seems to have the wrong extension
+        } else if (handler instanceof HWPFFileHandler) {
             handler = new XWPFFileHandler();
         } else if (handler instanceof HSSFFileHandler) {
             handler = new XSSFFileHandler();
         } else if (handler instanceof HSLFFileHandler) {
-			handler = new XSLFFileHandler();
-
-		// and the other way around, use HWPF instead of XWPF and so forth
-		} else if(handler instanceof XWPFFileHandler) {
-			handler = new HWPFFileHandler();
-		} else if(handler instanceof XSSFFileHandler) {
-			handler = new HSSFFileHandler();
-		} else if(handler instanceof XSLFFileHandler) {
-			handler = new HSLFFileHandler();
+            handler = new XSLFFileHandler();
+
+        // and the other way around, use HWPF instead of XWPF and so forth
+        } else if(handler instanceof XWPFFileHandler) {
+            handler = new HWPFFileHandler();
+        } else if(handler instanceof XSSFFileHandler) {
+            handler = new HSSFFileHandler();
+        } else if(handler instanceof XSLFFileHandler) {
+            handler = new HSLFFileHandler();
         } else {
-			// nothing matched => throw the exception to the outside
-			throw e;
-		}
-
-		// we found a different handler to try processing again
-		handleFile(inputFile);
-	}
-
-	private void handleFile(File inputFile) throws Exception {
-		try (InputStream newStream = new BufferedInputStream(new FileInputStream(inputFile), 64*1024)) {
-			handler.handleFile(newStream, inputFile.getAbsolutePath());
-		}
-	}
+            // nothing matched => throw the exception to the outside
+            throw e;
+        }
+
+        // we found a different handler to try processing again
+        handleFile(inputFile);
+    }
+
+    private void handleFile(File inputFile) throws Exception {
+        try (InputStream newStream = new BufferedInputStream(new FileInputStream(inputFile), 64*1024)) {
+            handler.handleFile(newStream, inputFile.getAbsolutePath());
+        }
+    }
 }
diff --git a/poi-integration/src/test/java/org/apache/poi/stress/FileHandler.java b/poi-integration/src/test/java/org/apache/poi/stress/FileHandler.java
index 62e5d81ced..be3e625ed2 100644
--- a/poi-integration/src/test/java/org/apache/poi/stress/FileHandler.java
+++ b/poi-integration/src/test/java/org/apache/poi/stress/FileHandler.java
@@ -24,28 +24,28 @@ import java.io.InputStream;
  * used in the stress testing.
  */
 public interface FileHandler {
-	/**
-	 * The FileHandler receives a stream ready for reading the
-	 * file and should handle the content that is provided and
-	 * try to read and interpret the data.
-	 *
-	 * Closing is handled by the framework outside this call.
-	 *
-	 * @param stream The input stream to read the file from.
-	 * @param path the relative path to the file
-	 * @throws Exception If an error happens in the file-specific handler
-	 */
-	void handleFile(InputStream stream, String path) throws Exception;
+    /**
+     * The FileHandler receives a stream ready for reading the
+     * file and should handle the content that is provided and
+     * try to read and interpret the data.
+     *
+     * Closing is handled by the framework outside this call.
+     *
+     * @param stream The input stream to read the file from.
+     * @param path the relative path to the file
+     * @throws Exception If an error happens in the file-specific handler
+     */
+    void handleFile(InputStream stream, String path) throws Exception;
 
-	/**
-	 * Ensures that extracting text from the given file
-	 * is returning some text.
-	 */
-	void handleExtracting(File file) throws Exception;
+    /**
+     * Ensures that extracting text from the given file
+     * is returning some text.
+     */
+    void handleExtracting(File file) throws Exception;
 
-	/**
-	 * Allows to perform some additional work, e.g. run
-	 * some of the example applications
-	 */
-	void handleAdditional(File file) throws Exception;
+    /**
+     * Allows to perform some additional work, e.g. run
+     * some of the example applications
+     */
+    void handleAdditional(File file) throws Exception;
 }
diff --git a/poi-integration/src/test/java/org/apache/poi/stress/HDGFFileHandler.java b/poi-integration/src/test/java/org/apache/poi/stress/HDGFFileHandler.java
index 1d2ca65d4c..80eccca5b0 100644
--- a/poi-integration/src/test/java/org/apache/poi/stress/HDGFFileHandler.java
+++ b/poi-integration/src/test/java/org/apache/poi/stress/HDGFFileHandler.java
@@ -32,47 +32,47 @@ import org.apache.poi.poifs.filesystem.POIFSFileSystem;
 import org.junit.jupiter.api.Test;
 
 class HDGFFileHandler extends POIFSFileHandler {
-	@Override
-	public void handleFile(InputStream stream, String path) throws IOException {
-	    POIFSFileSystem poifs = new POIFSFileSystem(stream);
-		HDGFDiagram diagram = new HDGFDiagram(poifs);
-		Stream[] topLevelStreams = diagram.getTopLevelStreams();
-		assertNotNull(topLevelStreams);
-		for(Stream str : topLevelStreams) {
-			assertTrue(str.getPointer().getLength() >= 0);
-		}
+    @Override
+    public void handleFile(InputStream stream, String path) throws IOException {
+        POIFSFileSystem poifs = new POIFSFileSystem(stream);
+        HDGFDiagram diagram = new HDGFDiagram(poifs);
+        Stream[] topLevelStreams = diagram.getTopLevelStreams();
+        assertNotNull(topLevelStreams);
+        for(Stream str : topLevelStreams) {
+            assertTrue(str.getPointer().getLength() >= 0);
+        }
 
-		TrailerStream trailerStream = diagram.getTrailerStream();
-		assertNotNull(trailerStream);
-		assertTrue(trailerStream.getPointer().getLength() >= 0);
-		diagram.close();
-		poifs.close();
+        TrailerStream trailerStream = diagram.getTrailerStream();
+        assertNotNull(trailerStream);
+        assertTrue(trailerStream.getPointer().getLength() >= 0);
+        diagram.close();
+        poifs.close();
 
-		// writing is not yet implemented... handlePOIDocument(diagram);
-	}
+        // writing is not yet implemented... handlePOIDocument(diagram);
+    }
 
-	// a test-case to test this locally without executing the full TestAllFiles
-	@Override
+    // a test-case to test this locally without executing the full TestAllFiles
+    @Override
     @Test
-	void test() throws Exception {
+    void test() throws Exception {
         File file = new File("test-data/diagram/44501.vsd");
 
         InputStream stream = new FileInputStream(file);
-		try {
-			handleFile(stream, file.getPath());
-		} finally {
-			stream.close();
-		}
+        try {
+            handleFile(stream, file.getPath());
+        } finally {
+            stream.close();
+        }
 
-		handleExtracting(file);
+        handleExtracting(file);
 
-		stream = new FileInputStream(file);
-		try {
-			try (VisioTextExtractor extractor = new VisioTextExtractor(stream)) {
-				assertNotNull(extractor.getText());
-			}
-		} finally {
-			stream.close();
-		}
-	}
+        stream = new FileInputStream(file);
+        try {
+            try (VisioTextExtractor extractor = new VisioTextExtractor(stream)) {
+                assertNotNull(extractor.getText());
+            }
+        } finally {
+            stream.close();
+        }
+    }
 }
diff --git a/poi-integration/src/test/java/org/apache/poi/stress/HMEFFileHandler.java b/poi-integration/src/test/java/org/apache/poi/stress/HMEFFileHandler.java
index 34cf9ee5b9..fe1788d29e 100644
--- a/poi-integration/src/test/java/org/apache/poi/stress/HMEFFileHandler.java
+++ b/poi-integration/src/test/java/org/apache/poi/stress/HMEFFileHandler.java
@@ -34,58 +34,58 @@ import org.junit.jupiter.api.Test;
 
 class HMEFFileHandler extends AbstractFileHandler {
 
-	@Override
-	public void handleExtracting(File file) throws Exception {
-		FileMagic fm = FileMagic.valueOf(file);
-		if (fm == FileMagic.OLE2) {
-			super.handleExtracting(file);
-		}
-	}
+    @Override
+    public void handleExtracting(File file) throws Exception {
+        FileMagic fm = FileMagic.valueOf(file);
+        if (fm == FileMagic.OLE2) {
+            super.handleExtracting(file);
+        }
+    }
 
-	@Override
+    @Override
     public void handleFile(InputStream stream, String path) throws Exception {
-		HMEFMessage msg = new HMEFMessage(stream);
+        HMEFMessage msg = new HMEFMessage(stream);
 
-		// there are test-files that have no body...
-		String[] HTML_BODY = {
-			"Testing TNEF Message", "TNEF test message with attachments", "Test"
-		};
-		String bodyStr;
-		if(Arrays.asList(HTML_BODY).contains(msg.getSubject())) {
-			MAPIAttribute bodyHtml = msg.getMessageMAPIAttribute(MAPIProperty.BODY_HTML);
-			assertNotNull(bodyHtml);
-			bodyStr = new String(bodyHtml.getData(), getEncoding(msg));
-		} else {
-			bodyStr = msg.getBody();
-		}
-		assertNotNull( bodyStr, "Body is not set" );
-		assertNotNull( msg.getSubject(), "Subject is not set" );
-	}
+        // there are test-files that have no body...
+        String[] HTML_BODY = {
+            "Testing TNEF Message", "TNEF test message with attachments", "Test"
+        };
+        String bodyStr;
+        if(Arrays.asList(HTML_BODY).contains(msg.getSubject())) {
+            MAPIAttribute bodyHtml = msg.getMessageMAPIAttribute(MAPIProperty.BODY_HTML);
+            assertNotNull(bodyHtml);
+            bodyStr = new String(bodyHtml.getData(), getEncoding(msg));
+        } else {
+            bodyStr = msg.getBody();
+        }
+        assertNotNull( bodyStr, "Body is not set" );
+        assertNotNull( msg.getSubject(), "Subject is not set" );
+    }
 
-	// a test-case to test this locally without executing the full TestAllFiles
-	@Test
-	void test() throws Exception {
-	    String path = "test-data/hmef/quick-winmail.dat";
-		try (InputStream stream = new FileInputStream(path)) {
-			handleFile(stream, path);
-		}
-	}
+    // a test-case to test this locally without executing the full TestAllFiles
+    @Test
+    void test() throws Exception {
+        String path = "test-data/hmef/quick-winmail.dat";
+        try (InputStream stream = new FileInputStream(path)) {
+            handleFile(stream, path);
+        }
+    }
 
-	private String getEncoding(HMEFMessage tnefDat) {
-		TNEFAttribute oemCP = tnefDat.getMessageAttribute(TNEFProperty.ID_OEMCODEPAGE);
-		MAPIAttribute cpId = tnefDat.getMessageMAPIAttribute(MAPIProperty.INTERNET_CPID);
-		int codePage = 1252;
-		if (oemCP != null) {
-			codePage = LittleEndian.getInt(oemCP.getData());
-		} else if (cpId != null) {
-			codePage =  LittleEndian.getInt(cpId.getData());
-		}
-		switch (codePage) {
-			// see http://en.wikipedia.org/wiki/Code_page for more
-			case 1252: return "Windows-1252";
-			case 20127: return "US-ASCII";
-			default: return "cp"+codePage;
-		}
-	}
+    private String getEncoding(HMEFMessage tnefDat) {
+        TNEFAttribute oemCP = tnefDat.getMessageAttribute(TNEFProperty.ID_OEMCODEPAGE);
+        MAPIAttribute cpId = tnefDat.getMessageMAPIAttribute(MAPIProperty.INTERNET_CPID);
+        int codePage = 1252;
+        if (oemCP != null) {
+            codePage = LittleEndian.getInt(oemCP.getData());
+        } else if (cpId != null) {
+            codePage =  LittleEndian.getInt(cpId.getData());
+        }
+        switch (codePage) {
+            // see http://en.wikipedia.org/wiki/Code_page for more
+            case 1252: return "Windows-1252";
+            case 20127: return "US-ASCII";
+            default: return "cp"+codePage;
+        }
+    }
 
 }
diff --git a/poi-integration/src/test/java/org/apache/poi/stress/HPBFFileHandler.java b/poi-integration/src/test/java/org/apache/poi/stress/HPBFFileHandler.java
index 419840d696..6da0110e19 100644
--- a/poi-integration/src/test/java/org/apache/poi/stress/HPBFFileHandler.java
+++ b/poi-integration/src/test/java/org/apache/poi/stress/HPBFFileHandler.java
@@ -28,40 +28,40 @@ import org.apache.poi.poifs.filesystem.POIFSFileSystem;
 import org.junit.jupiter.api.Test;
 
 class HPBFFileHandler extends POIFSFileHandler {
-	@Override
-	public void handleFile(InputStream stream, String path) throws Exception {
-		HPBFDocument pub = new HPBFDocument(new POIFSFileSystem(stream));
-		assertNotNull(pub.getEscherDelayStm());
-		assertNotNull(pub.getMainContents());
-		assertNotNull(pub.getQuillContents());
+    @Override
+    public void handleFile(InputStream stream, String path) throws Exception {
+        HPBFDocument pub = new HPBFDocument(new POIFSFileSystem(stream));
+        assertNotNull(pub.getEscherDelayStm());
+        assertNotNull(pub.getMainContents());
+        assertNotNull(pub.getQuillContents());
 
-		// writing is not yet implemented... handlePOIDocument(pub);
-		pub.close();
-	}
+        // writing is not yet implemented... handlePOIDocument(pub);
+        pub.close();
+    }
 
-	// a test-case to test this locally without executing the full TestAllFiles
-	@Override
+    // a test-case to test this locally without executing the full TestAllFiles
+    @Override
     @Test
-	void test() throws Exception {
+    void test() throws Exception {
         File file = new File("test-data/publisher/SampleBrochure.pub");
 
         InputStream stream = new FileInputStream(file);
-		try {
-			handleFile(stream, file.getPath());
-		} finally {
-			stream.close();
-		}
+        try {
+            handleFile(stream, file.getPath());
+        } finally {
+            stream.close();
+        }
 
-		handleExtracting(file);
+        handleExtracting(file);
 
-		stream = new FileInputStream(file);
-		try {
-			try (PublisherTextExtractor extractor = new PublisherTextExtractor(stream)) {
-				assertNotNull(extractor.getText());
-			}
-		} finally {
-			stream.close();
-		}
-	}
+        stream = new FileInputStream(file);
+        try {
+            try (PublisherTextExtractor extractor = new PublisherTextExtractor(stream)) {
+                assertNotNull(extractor.getText());
+            }
+        } finally {
+            stream.close();
+        }
+    }
 
 }
diff --git a/poi-integration/src/test/java/org/apache/poi/stress/HPSFFileHandler.java b/poi-integration/src/test/java/org/apache/poi/stress/HPSFFileHandler.java
index 53ca398b5c..dadb2a2d5c 100644
--- a/poi-integration/src/test/java/org/apache/poi/stress/HPSFFileHandler.java
+++ b/poi-integration/src/test/java/org/apache/poi/stress/HPSFFileHandler.java
@@ -66,30 +66,30 @@ class HPSFFileHandler extends POIFSFileHandler {
 
     @Override
     public void handleFile(InputStream stream, String path) throws Exception {
-	    POIFSFileSystem poifs = new POIFSFileSystem(stream);
-		HPSFPropertiesOnlyDocument hpsf = new HPSFPropertiesOnlyDocument(poifs);
-		DocumentSummaryInformation dsi = hpsf.getDocumentSummaryInformation();
-		SummaryInformation si = hpsf.getSummaryInformation();
-		boolean hasDSI = hasPropertyStream(poifs, DocumentSummaryInformation.DEFAULT_STREAM_NAME);
-		boolean hasSI = hasPropertyStream(poifs, SummaryInformation.DEFAULT_STREAM_NAME);
-
-		assertEquals(hasDSI, dsi != null);
+        POIFSFileSystem poifs = new POIFSFileSystem(stream);
+        HPSFPropertiesOnlyDocument hpsf = new HPSFPropertiesOnlyDocument(poifs);
+        DocumentSummaryInformation dsi = hpsf.getDocumentSummaryInformation();
+        SummaryInformation si = hpsf.getSummaryInformation();
+        boolean hasDSI = hasPropertyStream(poifs, DocumentSummaryInformation.DEFAULT_STREAM_NAME);
+        boolean hasSI = hasPropertyStream(poifs, SummaryInformation.DEFAULT_STREAM_NAME);
+
+        assertEquals(hasDSI, dsi != null);
         assertEquals(hasSI, si != null);
 
-		handlePOIDocument(hpsf);
-	}
+        handlePOIDocument(hpsf);
+    }
 
-	private static boolean hasPropertyStream(POIFSFileSystem poifs, String streamName) throws IOException {
+    private static boolean hasPropertyStream(POIFSFileSystem poifs, String streamName) throws IOException {
         DirectoryNode root = poifs.getRoot();
-	    if (!root.hasEntry(streamName)) {
-	        return false;
-	    }
+        if (!root.hasEntry(streamName)) {
+            return false;
+        }
         try (DocumentInputStream dis = root.createDocumentInputStream(streamName)) {
             return PropertySet.isPropertySetStream(dis);
         }
-	}
+    }
 
-	private static File getTempFile() {
+    private static File getTempFile() {
         File f = null;
         try {
             f = TempFile.createTempFile("hpsfCopy", "out");
@@ -112,16 +112,16 @@ class HPSFFileHandler extends POIFSFileHandler {
     }
 
 
-	// a test-case to test this locally without executing the full TestAllFiles
-	@Override
+    // a test-case to test this locally without executing the full TestAllFiles
+    @Override
     @Test
     @SuppressWarnings("java:S2699")
-	void test() throws Exception {
-	    String path = "test-data/diagram/44501.vsd";
+    void test() throws Exception {
+        String path = "test-data/diagram/44501.vsd";
         try (InputStream stream = new FileInputStream(path)) {
             handleFile(stream, path);
         }
-	}
+    }
 
     // a test-case to test this locally without executing the full TestAllFiles
     @Test
diff --git a/poi-integration/src/test/java/org/apache/poi/stress/HSMFFileHandler.java b/poi-integration/src/test/java/org/apache/poi/stress/HSMFFileHandler.java
index 8a21781bc4..847419ba88 100644
--- a/poi-integration/src/test/java/org/apache/poi/stress/HSMFFileHandler.java
+++ b/poi-integration/src/test/java/org/apache/poi/stress/HSMFFileHandler.java
@@ -28,61 +28,61 @@ import org.apache.poi.hsmf.datatypes.DirectoryChunk;
 import org.junit.jupiter.api.Test;
 
 class HSMFFileHandler extends POIFSFileHandler {
-	@Override
-	public void handleFile(InputStream stream, String path) throws Exception {
-		MAPIMessage mapi = new MAPIMessage(stream);
-		assertNotNull(mapi.getAttachmentFiles());
-		assertNotNull(mapi.getDisplayBCC());
-		assertNotNull(mapi.getMessageDate());
-
-		AttachmentChunks[] attachments = mapi.getAttachmentFiles();
-
-		for(AttachmentChunks attachment : attachments) {
-
-		   DirectoryChunk chunkDirectory = attachment.getAttachmentDirectory();
-		   if(chunkDirectory != null) {
-			   MAPIMessage attachmentMSG = chunkDirectory.getAsEmbeddedMessage();
-			   assertNotNull(attachmentMSG);
-			   String body = attachmentMSG.getTextBody();
-			   assertNotNull(body);
-		   }
-		}
-
-		/* => Writing isn't yet supported...
-		// write out the file
-		File file = TempFile.createTempFile("StressTest", ".msg");
-		writeToFile(mapi, file);
-
-		MAPIMessage read = new MAPIMessage(file.getAbsolutePath());
-		assertNotNull(read.getAttachmentFiles());
-		assertNotNull(read.getDisplayBCC());
-		assertNotNull(read.getMessageDate());
-		*/
-
-		// writing is not yet supported... handlePOIDocument(mapi);
-
-		mapi.close();
-	}
-
-//	private void writeToFile(MAPIMessage mapi, File file)
-//			throws FileNotFoundException, IOException {
-//		OutputStream stream = new FileOutputStream(file);
-//		try {
-//			mapi.write(stream);
-//		} finally {
-//			stream.close();
-//		}
-//	}
-
-	// a test-case to test this locally without executing the full TestAllFiles
-	@Override
+    @Override
+    public void handleFile(InputStream stream, String path) throws Exception {
+        MAPIMessage mapi = new MAPIMessage(stream);
+        assertNotNull(mapi.getAttachmentFiles());
+        assertNotNull(mapi.getDisplayBCC());
+        assertNotNull(mapi.getMessageDate());
+
+        AttachmentChunks[] attachments = mapi.getAttachmentFiles();
+
+        for(AttachmentChunks attachment : attachments) {
+
+           DirectoryChunk chunkDirectory = attachment.getAttachmentDirectory();
+           if(chunkDirectory != null) {
+               MAPIMessage attachmentMSG = chunkDirectory.getAsEmbeddedMessage();
+               assertNotNull(attachmentMSG);
+               String body = attachmentMSG.getTextBody();
+               assertNotNull(body);
+           }
+        }
+
+        /* => Writing isn't yet supported...
+        // write out the file
+        File file = TempFile.createTempFile("StressTest", ".msg");
+        writeToFile(mapi, file);
+
+        MAPIMessage read = new MAPIMessage(file.getAbsolutePath());
+        assertNotNull(read.getAttachmentFiles());
+        assertNotNull(read.getDisplayBCC());
+        assertNotNull(read.getMessageDate());
+        */
+
+        // writing is not yet supported... handlePOIDocument(mapi);
+
+        mapi.close();
+    }
+
+//  private void writeToFile(MAPIMessage mapi, File file)
+//          throws FileNotFoundException, IOException {
+//      OutputStream stream = new FileOutputStream(file);
+//      try {
+//          mapi.write(stream);
+//      } finally {
+//          stream.close();
+//      }
+//  }
+
+    // a test-case to test this locally without executing the full TestAllFiles
+    @Override
     @Test
-	void test() throws Exception {
+    void test() throws Exception {
         File file = new File("test-data/hsmf/logsat.com_signatures_valid.msg");
-		try (InputStream stream = new FileInputStream(file)) {
-			handleFile(stream, file.getPath());
-		}
+        try (InputStream stream = new FileInputStream(file)) {
+            handleFile(stream, file.getPath());
+        }
 
-		handleExtracting(file);
-	}
+        handleExtracting(file);
+    }
 }
\ No newline at end of file
diff --git a/poi-integration/src/test/java/org/apache/poi/stress/HSSFFileHandler.java b/poi-integration/src/test/java/org/apache/poi/stress/HSSFFileHandler.java
index f8e0de4ff1..9e371362bf 100644
--- a/poi-integration/src/test/java/org/apache/poi/stress/HSSFFileHandler.java
+++ b/poi-integration/src/test/java/org/apache/poi/stress/HSSFFileHandler.java
@@ -37,90 +37,90 @@ import org.apache.commons.io.output.NullPrintStream;
 import org.junit.jupiter.api.Test;
 
 class HSSFFileHandler extends SpreadsheetHandler {
-	private final POIFSFileHandler delegate = new POIFSFileHandler();
-	@Override
+    private final POIFSFileHandler delegate = new POIFSFileHandler();
+    @Override
     public void handleFile(InputStream stream, String path) throws Exception {
-		HSSFWorkbook wb = new HSSFWorkbook(stream);
-		handleWorkbook(wb);
+        HSSFWorkbook wb = new HSSFWorkbook(stream);
+        handleWorkbook(wb);
 
-		// TODO: some documents fail currently...
+        // TODO: some documents fail currently...
         // Note - as of Bugzilla 48036 (svn r828244, r828247) POI is capable of evaluating
         // IntersectionPtg.  However it is still not capable of parsing it.
         // So FormulaEvalTestData.xls now contains a few formulas that produce errors here.
         //HSSFFormulaEvaluator evaluator = new HSSFFormulaEvaluator(wb);
         //evaluator.evaluateAll();
 
-		delegate.handlePOIDocument(wb);
-
-		// also try to see if some of the Records behave incorrectly
-		// TODO: still fails on some records... RecordsStresser.handleWorkbook(wb);
-
-		HSSFOptimiser.optimiseCellStyles(wb);
-		for(Sheet sheet : wb) {
-			for (Row row : sheet) {
-				for (Cell cell : row) {
-					assertNotNull(cell.getCellStyle());
-				}
-			}
-		}
-
-		HSSFOptimiser.optimiseFonts(wb);
-	}
-
-	private static final Set<String> EXPECTED_ADDITIONAL_FAILURES = new HashSet<>();
-	static {
-		// encrypted
-		EXPECTED_ADDITIONAL_FAILURES.add("spreadsheet/35897-type4.xls");
-		EXPECTED_ADDITIONAL_FAILURES.add("spreadsheet/xor-encryption-abc.xls");
-		EXPECTED_ADDITIONAL_FAILURES.add("spreadsheet/password.xls");
-		// broken files
-		EXPECTED_ADDITIONAL_FAILURES.add("spreadsheet/43493.xls");
-		// TODO: ok to ignore?
-		EXPECTED_ADDITIONAL_FAILURES.add("spreadsheet/50833.xls");
-		EXPECTED_ADDITIONAL_FAILURES.add("spreadsheet/51832.xls");
-		EXPECTED_ADDITIONAL_FAILURES.add("spreadsheet/XRefCalc.xls");
-		EXPECTED_ADDITIONAL_FAILURES.add("spreadsheet/61300.xls");
-	}
-
-	@Override
-	public void handleAdditional(File file) throws Exception {
-		// redirect stdout as the examples often write lots of text
-		PrintStream oldOut = System.out;
-		String fileWithParent = file.getParentFile().getName() + "/" + file.getName();
-		try {
-			System.setOut(new NullPrintStream());
-
-			BiffViewer.main(new String[]{file.getAbsolutePath()});
-
-			assertFalse( EXPECTED_ADDITIONAL_FAILURES.contains(fileWithParent), "Expected Extraction to fail for file " + file + " and handler " + this + ", but did not fail!" );
-		} catch (OldExcelFormatException e) {
-			// old excel formats are not supported here
-		} catch (RuntimeException e) {
-			if(!EXPECTED_ADDITIONAL_FAILURES.contains(fileWithParent)) {
-				throw e;
-			}
-		} finally {
-			System.setOut(oldOut);
-		}
-	}
-
-	// a test-case to test this locally without executing the full TestAllFiles
-	@Test
-	void test() throws Exception {
+        delegate.handlePOIDocument(wb);
+
+        // also try to see if some of the Records behave incorrectly
+        // TODO: still fails on some records... RecordsStresser.handleWorkbook(wb);
+
+        HSSFOptimiser.optimiseCellStyles(wb);
+        for(Sheet sheet : wb) {
+            for (Row row : sheet) {
+                for (Cell cell : row) {
+                    assertNotNull(cell.getCellStyle());
+                }
+            }
+        }
+
+        HSSFOptimiser.optimiseFonts(wb);
+    }
+
+    private static final Set<String> EXPECTED_ADDITIONAL_FAILURES = new HashSet<>();
+    static {
+        // encrypted
+        EXPECTED_ADDITIONAL_FAILURES.add("spreadsheet/35897-type4.xls");
+        EXPECTED_ADDITIONAL_FAILURES.add("spreadsheet/xor-encryption-abc.xls");
+        EXPECTED_ADDITIONAL_FAILURES.add("spreadsheet/password.xls");
+        // broken files
+        EXPECTED_ADDITIONAL_FAILURES.add("spreadsheet/43493.xls");
+        // TODO: ok to ignore?
+        EXPECTED_ADDITIONAL_FAILURES.add("spreadsheet/50833.xls");
+        EXPECTED_ADDITIONAL_FAILURES.add("spreadsheet/51832.xls");
+        EXPECTED_ADDITIONAL_FAILURES.add("spreadsheet/XRefCalc.xls");
+        EXPECTED_ADDITIONAL_FAILURES.add("spreadsheet/61300.xls");
+    }
+
+    @Override
+    public void handleAdditional(File file) throws Exception {
+        // redirect stdout as the examples often write lots of text
+        PrintStream oldOut = System.out;
+        String fileWithParent = file.getParentFile().getName() + "/" + file.getName();
+        try {
+            System.setOut(new NullPrintStream());
+
+            BiffViewer.main(new String[]{file.getAbsolutePath()});
+
+            assertFalse( EXPECTED_ADDITIONAL_FAILURES.contains(fileWithParent), "Expected Extraction to fail for file " + file + " and handler " + this + ", but did not fail!" );
+        } catch (OldExcelFormatException e) {
+            // old excel formats are not supported here
+        } catch (RuntimeException e) {
+            if(!EXPECTED_ADDITIONAL_FAILURES.contains(fileWithParent)) {
+                throw e;
+            }
+        } finally {
+            System.setOut(oldOut);
+        }
+    }
+
+    // a test-case to test this locally without executing the full TestAllFiles
+    @Test
+    void test() throws Exception {
         File file = new File("../test-data/spreadsheet/59074.xls");
 
-		try (InputStream stream = new FileInputStream(file)) {
-			handleFile(stream, file.getPath());
-		}
+        try (InputStream stream = new FileInputStream(file)) {
+            handleFile(stream, file.getPath());
+        }
 
-		handleExtracting(file);
+        handleExtracting(file);
 
-		handleAdditional(file);
-	}
+        handleAdditional(file);
+    }
 
-	// a test-case to test this locally without executing the full TestAllFiles
+    // a test-case to test this locally without executing the full TestAllFiles
     @Test
-	@SuppressWarnings("java:S2699")
+    @SuppressWarnings("java:S2699")
     void testExtractor() throws Exception {
         handleExtracting(new File("../test-data/spreadsheet/59074.xls"));
     }
diff --git a/poi-integration/src/test/java/org/apache/poi/stress/OPCFileHandler.java b/poi-integration/src/test/java/org/apache/poi/stress/OPCFileHandler.java
index c4f5485806..2bbd9fc70a 100644
--- a/poi-integration/src/test/java/org/apache/poi/stress/OPCFileHandler.java
+++ b/poi-integration/src/test/java/org/apache/poi/stress/OPCFileHandler.java
@@ -31,7 +31,7 @@ import org.apache.poi.xwpf.usermodel.XWPFRelation;
 import org.junit.jupiter.api.Test;
 
 class OPCFileHandler extends AbstractFileHandler {
-	@Override
+    @Override
     public void handleFile(InputStream stream, String path) throws Exception {
         // ignore password protected files
         if (POIXMLDocumentHandler.isEncrypted(stream)) return;
@@ -59,15 +59,15 @@ class OPCFileHandler extends AbstractFileHandler {
         // text-extraction is not possible currently for these types of files
     }
 
-	// a test-case to test this locally without executing the full TestAllFiles
-	@Test
-	void test() throws Exception {
+    // a test-case to test this locally without executing the full TestAllFiles
+    @Test
+    void test() throws Exception {
         File file = new File("test-data/diagram/test.vsdx");
 
         try (InputStream stream = new PushbackInputStream(new FileInputStream(file), 100000)) {
             handleFile(stream, file.getPath());
         }
 
-		handleExtracting(file);
-	}
+        handleExtracting(file);
+    }
 }
diff --git a/poi-integration/src/test/java/org/apache/poi/stress/POIFSFileHandler.java b/poi-integration/src/test/java/org/apache/poi/stress/POIFSFileHandler.java
index d492979992..68c5798562 100644
--- a/poi-integration/src/test/java/org/apache/poi/stress/POIFSFileHandler.java
+++ b/poi-integration/src/test/java/org/apache/poi/stress/POIFSFileHandler.java
@@ -31,15 +31,15 @@ import org.junit.jupiter.api.Test;
 
 class POIFSFileHandler extends AbstractFileHandler {
 
-	@Override
+    @Override
     public void handleFile(InputStream stream, String path) throws Exception {
         try (POIFSFileSystem fs = new POIFSFileSystem(stream)) {
             handlePOIFSFileSystem(fs);
             handleHPSFProperties(fs);
         }
-	}
+    }
 
-	private void handleHPSFProperties(POIFSFileSystem fs) throws IOException {
+    private void handleHPSFProperties(POIFSFileSystem fs) throws IOException {
         try (HPSFPropertiesExtractor ext = new HPSFPropertiesExtractor(fs)) {
             // can be null
             ext.getDocSummaryInformation();
@@ -52,12 +52,12 @@ class POIFSFileHandler extends AbstractFileHandler {
     }
 
     private void handlePOIFSFileSystem(POIFSFileSystem fs) {
-		assertNotNull(fs);
-		assertNotNull(fs.getRoot());
-	}
+        assertNotNull(fs);
+        assertNotNull(fs.getRoot());
+    }
 
-	protected void handlePOIDocument(POIDocument doc) throws Exception {
-		try (UnsynchronizedByteArrayOutputStream out = new UnsynchronizedByteArrayOutputStream()) {
+    protected void handlePOIDocument(POIDocument doc) throws Exception {
+        try (UnsynchronizedByteArrayOutputStream out = new UnsynchronizedByteArrayOutputStream()) {
             doc.write(out);
 
             try (InputStream in = out.toInputStream();
@@ -65,7 +65,7 @@ class POIFSFileHandler extends AbstractFileHandler {
                 handlePOIFSFileSystem(fs);
             }
         }
-	}
+    }
 
     // a test-case to test this locally without executing the full TestAllFiles
     @Test
diff --git a/poi-integration/src/test/java/org/apache/poi/stress/POIXMLDocumentHandler.java b/poi-integration/src/test/java/org/apache/poi/stress/POIXMLDocumentHandler.java
index c99ebcb201..8f4c89587f 100644
--- a/poi-integration/src/test/java/org/apache/poi/stress/POIXMLDocumentHandler.java
+++ b/poi-integration/src/test/java/org/apache/poi/stress/POIXMLDocumentHandler.java
@@ -29,13 +29,13 @@ import org.apache.xmlbeans.XmlCursor;
 import org.apache.xmlbeans.XmlObject;
 
 public final class POIXMLDocumentHandler {
-	protected void handlePOIXMLDocument(POIXMLDocument doc) throws Exception {
-		assertNotNull(doc.getAllEmbeddedParts());
-		assertNotNull(doc.getPackage());
-		assertNotNull(doc.getPackagePart());
-		assertNotNull(doc.getProperties());
-		assertNotNull(doc.getRelations());
-	}
+    protected void handlePOIXMLDocument(POIXMLDocument doc) throws Exception {
+        assertNotNull(doc.getAllEmbeddedParts());
+        assertNotNull(doc.getPackage());
+        assertNotNull(doc.getPackagePart());
+        assertNotNull(doc.getProperties());
+        assertNotNull(doc.getRelations());
+    }
 
     protected static boolean isEncrypted(InputStream stream) throws IOException {
         if (FileMagic.valueOf(stream) == FileMagic.OLE2) {
diff --git a/poi-integration/src/test/java/org/apache/poi/stress/SpreadsheetHandler.java b/poi-integration/src/test/java/org/apache/poi/stress/SpreadsheetHandler.java
index 341902b4ea..50212654c9 100644
--- a/poi-integration/src/test/java/org/apache/poi/stress/SpreadsheetHandler.java
+++ b/poi-integration/src/test/java/org/apache/poi/stress/SpreadsheetHandler.java
@@ -33,68 +33,68 @@ import org.apache.poi.util.RecordFormatException;
 import org.apache.poi.xssf.usermodel.XSSFChartSheet;
 
 public abstract class SpreadsheetHandler extends AbstractFileHandler {
-	public void handleWorkbook(Workbook wb) throws IOException {
-		// try to access some of the content
-		readContent(wb);
+    public void handleWorkbook(Workbook wb) throws IOException {
+        // try to access some of the content
+        readContent(wb);
 
-		// write out the file
-		writeToArray(wb);
+        // write out the file
+        writeToArray(wb);
 
-		// access some more content (we had cases where writing corrupts the data in memory)
-		readContent(wb);
+        // access some more content (we had cases where writing corrupts the data in memory)
+        readContent(wb);
 
-		// write once more
-		UnsynchronizedByteArrayOutputStream out = writeToArray(wb);
+        // write once more
+        UnsynchronizedByteArrayOutputStream out = writeToArray(wb);
 
-		// read in the written file
-		Workbook read = WorkbookFactory.create(out.toInputStream());
+        // read in the written file
+        Workbook read = WorkbookFactory.create(out.toInputStream());
 
-		assertNotNull(read);
+        assertNotNull(read);
 
-		readContent(read);
+        readContent(read);
 
-		extractEmbedded(read);
+        extractEmbedded(read);
 
-		modifyContent(read);
+        modifyContent(read);
 
-		read.close();
-	}
+        read.close();
+    }
 
-	private UnsynchronizedByteArrayOutputStream writeToArray(Workbook wb) throws IOException {
-		UnsynchronizedByteArrayOutputStream stream = new UnsynchronizedByteArrayOutputStream();
-		wb.write(stream);
-		return stream;
-	}
+    private UnsynchronizedByteArrayOutputStream writeToArray(Workbook wb) throws IOException {
+        UnsynchronizedByteArrayOutputStream stream = new UnsynchronizedByteArrayOutputStream();
+        wb.write(stream);
+        return stream;
+    }
 
-	private void readContent(Workbook wb) {
-	    for(int i = 0;i < wb.getNumberOfSheets();i++) {
-			Sheet sheet = wb.getSheetAt(i);
-			assertNotNull(wb.getSheet(sheet.getSheetName()));
-			sheet.groupColumn((short) 4, (short) 5);
-			sheet.setColumnGroupCollapsed(4, true);
-			sheet.setColumnGroupCollapsed(4, false);
+    private void readContent(Workbook wb) {
+        for(int i = 0;i < wb.getNumberOfSheets();i++) {
+            Sheet sheet = wb.getSheetAt(i);
+            assertNotNull(wb.getSheet(sheet.getSheetName()));
+            sheet.groupColumn((short) 4, (short) 5);
+            sheet.setColumnGroupCollapsed(4, true);
+            sheet.setColumnGroupCollapsed(4, false);
 
-			// don't do this for very large sheets as it will take a long time
-			if(sheet.getPhysicalNumberOfRows() > 1000) {
-			    continue;
-			}
+            // don't do this for very large sheets as it will take a long time
+            if(sheet.getPhysicalNumberOfRows() > 1000) {
+                continue;
+            }
 
-			for(Row row : sheet) {
-			    for(Cell cell : row) {
-			        assertNotNull(cell.toString());
-			    }
-			}
-		}
+            for(Row row : sheet) {
+                for(Cell cell : row) {
+                    assertNotNull(cell.toString());
+                }
+            }
+        }
 
-		for (Name name : wb.getAllNames()) {
-			// this sometimes caused exceptions
+        for (Name name : wb.getAllNames()) {
+            // this sometimes caused exceptions
             if(!name.isFunctionName()) {
                 name.getRefersToFormula();
             }
-		}
-	}
+        }
+    }
 
-	private void extractEmbedded(Workbook wb) throws IOException {
+    private void extractEmbedded(Workbook wb) throws IOException {
         EmbeddedExtractor ee = new EmbeddedExtractor();
 
         for (Sheet s : wb) {
@@ -104,48 +104,48 @@ public abstract class SpreadsheetHandler extends AbstractFileHandler {
                 assertNotNull(ed.getShape());
             }
         }
-	}
-
-	private void modifyContent(Workbook wb) {
-		/* a number of file fail because of various things: udf, unimplemented functions, ...
-		we would need quite a list of excludes and the large regression tests would probably
-		take a lot longer to run...
-		try {
-			// try to re-compute all formulas to find cases where parsing fails
-			wb.getCreationHelper().createFormulaEvaluator().evaluateAll();
-		} catch (RuntimeException e) {
-			// only allow a specific exception which indicates that an external
-			// reference was not found
-			if(!e.getMessage().contains("Could not resolve external workbook name")) {
-				throw e;
-			}
-
-		}*/
-
-	    for (int i=wb.getNumberOfSheets()-1; i>=0; i--) {
-	    	if(wb.getSheetAt(i) instanceof XSSFChartSheet) {
-	    		// clone for chart-sheets is not supported
-	    		continue;
-			}
-
-	        try {
-	            wb.cloneSheet(i);
-	        } catch (RecordFormatException e) {
-	            if (e.getCause() instanceof CloneNotSupportedException) {
-	                // ignore me
-	                continue;
-	            }
-	            throw e;
-	        } catch (RuntimeException e) {
-	            if ("Could not find 'internal references' EXTERNALBOOK".equals(e.getMessage()) ||
-	                    "CountryRecord not found".equals(e.getMessage()) ||
-	                    "CountryRecord or SSTRecord not found".equals(e.getMessage()) ||
-	                    "Cannot add more than 65535 shapes".equals(e.getMessage()) ) {
-	                // ignore these here for now
-	                continue;
+    }
+
+    private void modifyContent(Workbook wb) {
+        /* a number of file fail because of various things: udf, unimplemented functions, ...
+        we would need quite a list of excludes and the large regression tests would probably
+        take a lot longer to run...
+        try {
+            // try to re-compute all formulas to find cases where parsing fails
+            wb.getCreationHelper().createFormulaEvaluator().evaluateAll();
+        } catch (RuntimeException e) {
+            // only allow a specific exception which indicates that an external
+            // reference was not found
+            if(!e.getMessage().contains("Could not resolve external workbook name")) {
+                throw e;
+            }
+
+        }*/
+
+        for (int i=wb.getNumberOfSheets()-1; i>=0; i--) {
+            if(wb.getSheetAt(i) instanceof XSSFChartSheet) {
+                // clone for chart-sheets is not supported
+                continue;
+            }
+
+            try {
+                wb.cloneSheet(i);
+            } catch (RecordFormatException e) {
+                if (e.getCause() instanceof CloneNotSupportedException) {
+                    // ignore me
+                    continue;
                 }
-	            throw e;
-	        }
-	    }
-	}
+                throw e;
+            } catch (RuntimeException e) {
+                if ("Could not find 'internal references' EXTERNALBOOK".equals(e.getMessage()) ||
+                        "CountryRecord not found".equals(e.getMessage()) ||
+                        "CountryRecord or SSTRecord not found".equals(e.getMessage()) ||
+                        "Cannot add more than 65535 shapes".equals(e.getMessage()) ) {
+                    // ignore these here for now
+                    continue;
+                }
+                throw e;
+            }
+        }
+    }
 }
\ No newline at end of file
diff --git a/poi-integration/src/test/java/org/apache/poi/stress/XSLFFileHandler.java b/poi-integration/src/test/java/org/apache/poi/stress/XSLFFileHandler.java
index 7a5aebd4c4..8b5fdbe646 100644
--- a/poi-integration/src/test/java/org/apache/poi/stress/XSLFFileHandler.java
+++ b/poi-integration/src/test/java/org/apache/poi/stress/XSLFFileHandler.java
@@ -31,55 +31,55 @@ import org.apache.poi.xslf.usermodel.XSLFSlideShow;
 import org.junit.jupiter.api.Test;
 
 class XSLFFileHandler extends SlideShowHandler {
-	@Override
+    @Override
     public void handleFile(InputStream stream, String path) throws Exception {
-	    try (XMLSlideShow slide = new XMLSlideShow(stream);
-			 XSLFSlideShow slideInner = new XSLFSlideShow(slide.getPackage())) {
-			;
-			assertNotNull(slideInner.getPresentation());
-			assertNotNull(slideInner.getSlideMasterReferences());
-			assertNotNull(slideInner.getSlideReferences());
-
-			new POIXMLDocumentHandler().handlePOIXMLDocument(slide);
-
-			handleSlideShow(slide);
-		} catch (POIXMLException e) {
-	    	Exception cause = (Exception)e.getCause();
-	    	throw cause == null ? e : cause;
-		}
-	}
-
-	@Override
+        try (XMLSlideShow slide = new XMLSlideShow(stream);
+             XSLFSlideShow slideInner = new XSLFSlideShow(slide.getPackage())) {
+            ;
+            assertNotNull(slideInner.getPresentation());
+            assertNotNull(slideInner.getSlideMasterReferences());
+            assertNotNull(slideInner.getSlideReferences());
+
+            new POIXMLDocumentHandler().handlePOIXMLDocument(slide);
+
+            handleSlideShow(slide);
+        } catch (POIXMLException e) {
+            Exception cause = (Exception)e.getCause();
+            throw cause == null ? e : cause;
+        }
+    }
+
+    @Override
     public void handleExtracting(File file) throws Exception {
         super.handleExtracting(file);
 
 
         // additionally try the other getText() methods
-		try (SlideShowExtractor<?,?> extractor = (SlideShowExtractor<?, ?>) ExtractorFactory.createExtractor(file)) {
-			assertNotNull(extractor);
-			extractor.setSlidesByDefault(true);
-			extractor.setNotesByDefault(true);
-			extractor.setMasterByDefault(true);
+        try (SlideShowExtractor<?,?> extractor = (SlideShowExtractor<?, ?>) ExtractorFactory.createExtractor(file)) {
+            assertNotNull(extractor);
+            extractor.setSlidesByDefault(true);
+            extractor.setNotesByDefault(true);
+            extractor.setMasterByDefault(true);
 
-			assertNotNull(extractor.getText());
+            assertNotNull(extractor.getText());
 
-			extractor.setSlidesByDefault(false);
-			extractor.setNotesByDefault(false);
-			extractor.setMasterByDefault(false);
+            extractor.setSlidesByDefault(false);
+            extractor.setNotesByDefault(false);
+            extractor.setMasterByDefault(false);
 
-			assertEquals("", extractor.getText(), "With all options disabled we should not get text");
-		}
+            assertEquals("", extractor.getText(), "With all options disabled we should not get text");
+        }
     }
 
     // a test-case to test this locally without executing the full TestAllFiles
-	@Override
+    @Override
     @Test
-	void test() throws Exception {
+    void test() throws Exception {
         File file = new File("test-data/slideshow/ca.ubc.cs.people_~emhill_presentations_HowWeRefactor.pptx");
-		try (InputStream stream = new FileInputStream(file)) {
-			handleFile(stream, file.getPath());
-		}
+        try (InputStream stream = new FileInputStream(file)) {
+            handleFile(stream, file.getPath());
+        }
 
-		handleExtracting(file);
-	}
+        handleExtracting(file);
+    }
 }