PDFBOX-5993: add test for embedded files

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1925230 13f79535-47bb-0310-9956-ffa450edef68

Author: THausherr

examples/src/test/java/org/apache/pdfbox/examples/pdmodel/ExtractEmbeddedFilesTest.java

@@ -0,0 +1,57 @@
+/*
+ * Copyright 2025 The Apache Software Foundation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.pdfbox.examples.pdmodel;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import org.junit.jupiter.api.Test;
+
+/**
+ *
+ * @author Tilman Hausherr
+ */
+class ExtractEmbeddedFilesTest
+{
+    /**
+     * Test that the correct attachments are extracted from a portable collection.
+     *
+     * @throws IOException 
+     */
+    @Test
+    void testExtractEmbeddedFiles() throws IOException
+    {
+        String dir = "target/test-output";
+        String collectionFilename = dir + "/PortableCollection.pdf";
+        String attachment1Filename = dir + "/Test1.txt";
+        String attachment2Filename = dir + "/Test2.txt";
+        String[] args = new String[] { collectionFilename };
+        CreatePortableCollection.main(args);
+        ExtractEmbeddedFiles.main(args);
+        byte[] ba1 = Files.readAllBytes(new File(attachment1Filename).toPath());
+        byte[] ba2 = Files.readAllBytes(new File(attachment2Filename).toPath());
+        String s1 = new String(ba1, StandardCharsets.US_ASCII);
+        String s2 = new String(ba2, StandardCharsets.US_ASCII);
+        assertEquals(s1, "This is the contents of the first embedded file");
+        assertEquals(s2, "This is the contents of the second embedded file");
+        Files.delete(Paths.get(collectionFilename));
+        Files.delete(Paths.get(attachment1Filename));
+        Files.delete(Paths.get(attachment2Filename));
+    }
+}