JAVA-2106: Move Java Convert PDF to Base64 to the pdf module

core-java-modules/core-java-string-operations-2/README.md

@@ -10,7 +10,6 @@ This module contains articles about string operations.
 - [Java String equalsIgnoreCase()](https://www.baeldung.com/java-string-equalsignorecase)
 - [Case-Insensitive String Matching in Java](https://www.baeldung.com/java-case-insensitive-string-matching)
 - [L-Trim and R-Trim Alternatives in Java](https://www.baeldung.com/java-trim-alternatives)
-- [Java Convert PDF to Base64](https://www.baeldung.com/java-convert-pdf-to-base64)
 - [Encode a String to UTF-8 in Java](https://www.baeldung.com/java-string-encode-utf-8)
 - [Guide to Character Encoding](https://www.baeldung.com/java-char-encoding)
 - [Convert Hex to ASCII in Java](https://www.baeldung.com/java-convert-hex-to-ascii) #remove additional readme file

core-java-modules/core-java-string-operations-2/src/test/java/com/baeldung/pdf/base64/EncodeDecodeUnitTest.java

@@ -1,86 +0,0 @@
-package com.baeldung.pdf.base64;
-
-import static org.junit.Assert.assertArrayEquals;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertNotEquals;
-
-import java.io.FileInputStream;
-import java.io.FileOutputStream;
-import java.io.IOException;
-import java.io.OutputStream;
-import java.nio.file.Files;
-import java.nio.file.Paths;
-
-import org.junit.BeforeClass;
-import org.junit.Test;
-
-public class EncodeDecodeUnitTest {
-
-    private static final String IN_FILE = "src/test/resources/input.pdf";
-    private static final String OUT_FILE = "src/test/resources/output.pdf";
-    private static byte[] inFileBytes;
-
-    @BeforeClass
-    public static void fileToByteArray() throws IOException {
-        inFileBytes = Files.readAllBytes(Paths.get(IN_FILE));
-    }
-
-    @Test
-    public void givenJavaBase64_whenEncoded_thenDecodedOK() throws IOException {
-
-        byte[] encoded = java.util.Base64.getEncoder().encode(inFileBytes);
-
-        byte[] decoded = java.util.Base64.getDecoder().decode(encoded);
-
-        writeToFile(OUT_FILE, decoded);
-
-        assertNotEquals(encoded.length, decoded.length);
-        assertEquals(inFileBytes.length, decoded.length);
-
-        assertArrayEquals(decoded, inFileBytes);
-
-    }
-
-    @Test
-    public void givenJavaBase64_whenEncodedStream_thenDecodedStreamOK() throws IOException {
-
-        try (OutputStream os = java.util.Base64.getEncoder().wrap(new FileOutputStream(OUT_FILE));
-          FileInputStream fis = new FileInputStream(IN_FILE)) {
-            byte[] bytes = new byte[1024];
-            int read;
-            while ((read = fis.read(bytes)) > -1) {
-                os.write(bytes, 0, read);
-            }
-        }
-
-        byte[] encoded = java.util.Base64.getEncoder().encode(inFileBytes);
-        byte[] encodedOnDisk = Files.readAllBytes(Paths.get(OUT_FILE));
-        assertArrayEquals(encoded, encodedOnDisk);
-
-        byte[] decoded = java.util.Base64.getDecoder().decode(encoded);
-        byte[] decodedOnDisk = java.util.Base64.getDecoder().decode(encodedOnDisk);
-        assertArrayEquals(decoded, decodedOnDisk);
-    }
-
-    @Test
-    public void givenApacheCommons_givenJavaBase64_whenEncoded_thenDecodedOK() throws IOException {
-
-        byte[] encoded = org.apache.commons.codec.binary.Base64.encodeBase64(inFileBytes);
-
-        byte[] decoded = org.apache.commons.codec.binary.Base64.decodeBase64(encoded);
-
-        writeToFile(OUT_FILE, decoded);
-
-        assertNotEquals(encoded.length, decoded.length);
-        assertEquals(inFileBytes.length, decoded.length);
-
-        assertArrayEquals(decoded, inFileBytes);
-    }
-
-    private void writeToFile(String fileName, byte[] bytes) throws IOException {
-        FileOutputStream fos = new FileOutputStream(fileName);
-        fos.write(bytes);
-        fos.flush();
-        fos.close();
-    }
-}