refactor CopyCompare again

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1896543 13f79535-47bb-0310-9956-ffa450edef68

poi-examples/src/main/java/org/apache/poi/examples/hpsf/CopyCompare.java

 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
-import java.io.PrintStream;
 import java.io.UnsupportedEncodingException;
 
 import org.apache.poi.hpsf.DocumentSummaryInformation;
 @SuppressWarnings({"java:S106","java:S4823"})
 public final class CopyCompare {
 
-    private PrintStream out = System.out;
+    private CopyCompare() {}
 
     /**
      * Runs the example program. The application expects one or two arguments:
      *                                      supported.
      */
     public static void main(final String[] args) throws IOException {
-        new CopyCompare().run(args);
-    }
-
-    public void run(String[] args) throws IOException {
         String originalFileName = null;
         String copyFileName = null;
 
             System.exit(1);
         }
 
+        boolean result = compare(originalFileName, copyFileName);
+        System.out.println(result ? "Equal" : "Not equal");
+    }
 
+    public static boolean compare(String originalFileName, String copyFileName) throws IOException {
         // Read the origin POIFS using the eventing API.
         final POIFSReader r = new POIFSReader();
         try (final POIFSFileSystem poiFs = new POIFSFileSystem();
              POIFSFileSystem cpfs = new POIFSFileSystem(new File(copyFileName))) {
             final DirectoryEntry oRoot = opfs.getRoot();
             final DirectoryEntry cRoot = cpfs.getRoot();
-            out.println(EntryUtils.areDirectoriesIdentical(oRoot, cRoot) ? "Equal" : "Not equal");
+            return EntryUtils.areDirectoriesIdentical(oRoot, cRoot);
         }
     }
 
-    public void setOut(PrintStream ps) {
-        out = ps;
-    }
-
     private interface InputStreamSupplier {
         InputStream get() throws IOException, WritingNotSupportedException;
     }

poi-integration/src/test/java/org/apache/poi/stress/HPSFFileHandler.java

 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 import static org.junit.jupiter.api.Assertions.fail;
 import static org.junit.jupiter.api.Assumptions.assumeFalse;
 
 import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStream;
-import java.io.PrintStream;
-import java.nio.charset.StandardCharsets;
 import java.util.Set;
 
-import org.apache.commons.io.output.UnsynchronizedByteArrayOutputStream;
 import org.apache.poi.examples.hpsf.CopyCompare;
 import org.apache.poi.hpsf.DocumentSummaryInformation;
 import org.apache.poi.hpsf.HPSFPropertiesOnlyDocument;
     public void handleAdditional(File file) throws Exception {
         assumeFalse(EXCLUDES_HANDLE_ADD.contains(file.getParentFile().getName()+"/"+file.getName()));
 
-        try (UnsynchronizedByteArrayOutputStream bos = new UnsynchronizedByteArrayOutputStream()) {
-            try (PrintStream psNew = new PrintStream(bos, true, "ISO-8859-1")) {
-                CopyCompare copyCompare = new CopyCompare();
-                copyCompare.setOut(psNew);
-                copyCompare.run(new String[]{file.getAbsolutePath(), copyOutput.get().getAbsolutePath()});
-                assertEquals("Equal" + NL, bos.toString(StandardCharsets.UTF_8));
-            }
-        }
+        boolean result = CopyCompare.compare(file.getAbsolutePath(), copyOutput.get().getAbsolutePath());
+        assertTrue(result);
     }