src/test/java/org/apache/commons/codec/binary/Base64OutputStreamTest.java - commons-codec - Git at Google

 /*
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * 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
  * 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.commons.codec.binary;

 import java.io.ByteArrayOutputStream;
 import java.io.OutputStream;

 import org.apache.commons.codec.CodecPolicy;
 import org.junit.Test;

 import static org.junit.Assert.assertArrayEquals;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;

 /**
  * @since 1.4
  */
 public class Base64OutputStreamTest {

     private final static byte[] CR_LF = {(byte) '\r', (byte) '\n'};

     private final static byte[] LF = {(byte) '\n'};

     private static final String STRING_FIXTURE = "Hello World";

     /**
      * Test the Base64OutputStream implementation against the special NPE inducing input
      * identified in the CODEC-98 bug.
      *
      * @throws Exception for some failure scenarios.
      */
     @Test
     public void testCodec98NPE() throws Exception {
         final byte[] codec98 = StringUtils.getBytesUtf8(Base64TestData.CODEC_98_NPE);
         final byte[] codec98_1024 = new byte[1024];
         System.arraycopy(codec98, 0, codec98_1024, 0, codec98.length);
         final ByteArrayOutputStream data = new ByteArrayOutputStream(1024);
         try (final Base64OutputStream stream = new Base64OutputStream(data, false)) {
             stream.write(codec98_1024, 0, 1024);
         }

         final byte[] decodedBytes = data.toByteArray();
         final String decoded = StringUtils.newStringUtf8(decodedBytes);
         assertEquals("codec-98 NPE Base64OutputStream", Base64TestData.CODEC_98_NPE_DECODED, decoded);
     }


     /**
      * Test the Base64OutputStream implementation against empty input.
      *
      * @throws Exception
      *             for some failure scenarios.
      */
     @Test
     public void testBase64EmptyOutputStreamMimeChunkSize() throws Exception {
         testBase64EmptyOutputStream(BaseNCodec.MIME_CHUNK_SIZE);
     }

     /**
      * Test the Base64OutputStream implementation against empty input.
      *
      * @throws Exception
      *             for some failure scenarios.
      */
     @Test
     public void testBase64EmptyOutputStreamPemChunkSize() throws Exception {
         testBase64EmptyOutputStream(BaseNCodec.PEM_CHUNK_SIZE);
     }

     private void testBase64EmptyOutputStream(final int chunkSize) throws Exception {
         final byte[] emptyEncoded = new byte[0];
         final byte[] emptyDecoded = new byte[0];
         testByteByByte(emptyEncoded, emptyDecoded, chunkSize, CR_LF);
         testByChunk(emptyEncoded, emptyDecoded, chunkSize, CR_LF);
     }

     /**
      * Test the Base64OutputStream implementation
      *
      * @throws Exception
      *             for some failure scenarios.
      */
     @Test
     public void testBase64OutputStreamByChunk() throws Exception {
         // Hello World test.
         byte[] encoded = StringUtils.getBytesUtf8("SGVsbG8gV29ybGQ=\r\n");
         byte[] decoded = StringUtils.getBytesUtf8(STRING_FIXTURE);
         testByChunk(encoded, decoded, BaseNCodec.MIME_CHUNK_SIZE, CR_LF);

         // Single Byte test.
         encoded = StringUtils.getBytesUtf8("AA==\r\n");
         decoded = new byte[]{(byte) 0};
         testByChunk(encoded, decoded, BaseNCodec.MIME_CHUNK_SIZE, CR_LF);

         // OpenSSL interop test.
         encoded = StringUtils.getBytesUtf8(Base64TestData.ENCODED_64_CHARS_PER_LINE);
         decoded = BaseNTestData.DECODED;
         testByChunk(encoded, decoded, BaseNCodec.PEM_CHUNK_SIZE, LF);

         // Single Line test.
         final String singleLine = Base64TestData.ENCODED_64_CHARS_PER_LINE.replaceAll("\n", "");
         encoded = StringUtils.getBytesUtf8(singleLine);
         decoded = BaseNTestData.DECODED;
         testByChunk(encoded, decoded, 0, LF);

         // test random data of sizes 0 thru 150
         final BaseNCodec codec = new Base64(0, null, false);
         for (int i = 0; i <= 150; i++) {
             final byte[][] randomData = BaseNTestData.randomData(codec, i);
             encoded = randomData[1];
             decoded = randomData[0];
             testByChunk(encoded, decoded, 0, LF);
         }
     }

     /**
      * Test the Base64OutputStream implementation
      *
      * @throws Exception
      *             for some failure scenarios.
      */
     @Test
     public void testBase64OutputStreamByteByByte() throws Exception {
         // Hello World test.
         byte[] encoded = StringUtils.getBytesUtf8("SGVsbG8gV29ybGQ=\r\n");
         byte[] decoded = StringUtils.getBytesUtf8(STRING_FIXTURE);
         testByteByByte(encoded, decoded, 76, CR_LF);

         // Single Byte test.
         encoded = StringUtils.getBytesUtf8("AA==\r\n");
         decoded = new byte[]{(byte) 0};
         testByteByByte(encoded, decoded, 76, CR_LF);

         // OpenSSL interop test.
         encoded = StringUtils.getBytesUtf8(Base64TestData.ENCODED_64_CHARS_PER_LINE);
         decoded = BaseNTestData.DECODED;
         testByteByByte(encoded, decoded, 64, LF);

         // Single Line test.
         final String singleLine = Base64TestData.ENCODED_64_CHARS_PER_LINE.replaceAll("\n", "");
         encoded = StringUtils.getBytesUtf8(singleLine);
         decoded = BaseNTestData.DECODED;
         testByteByByte(encoded, decoded, 0, LF);

         // test random data of sizes 0 thru 150
         final BaseNCodec codec = new Base64(0, null, false);
         for (int i = 0; i <= 150; i++) {
             final byte[][] randomData = BaseNTestData.randomData(codec, i);
             encoded = randomData[1];
             decoded = randomData[0];
             testByteByByte(encoded, decoded, 0, LF);
         }
     }

     /**
      * Test method does three tests on the supplied data: 1. encoded ---[DECODE]--> decoded 2. decoded ---[ENCODE]-->
      * encoded 3. decoded ---[WRAP-WRAP-WRAP-etc...] --> decoded
      * <p/>
      * By "[WRAP-WRAP-WRAP-etc...]" we mean situation where the Base64OutputStream wraps itself in encode and decode
      * mode over and over again.
      *
      * @param encoded
      *            base64 encoded data
      * @param decoded
      *            the data from above, but decoded
      * @param chunkSize
      *            chunk size (line-length) of the base64 encoded data.
      * @param separator
      *            Line separator in the base64 encoded data.
      * @throws Exception
      *             Usually signifies a bug in the Base64 commons-codec implementation.
      */
     private void testByChunk(final byte[] encoded, final byte[] decoded, final int chunkSize, final byte[] separator) throws Exception {

         // Start with encode.
         ByteArrayOutputStream byteOut = new ByteArrayOutputStream();
         OutputStream out = new Base64OutputStream(byteOut, true, chunkSize, separator);
         out.write(decoded);
         out.close();
         byte[] output = byteOut.toByteArray();
         assertArrayEquals("Streaming chunked base64 encode", encoded, output);

         // Now let's try decode.
         byteOut = new ByteArrayOutputStream();
         out = new Base64OutputStream(byteOut, false);
         out.write(encoded);
         out.close();
         output = byteOut.toByteArray();
         assertArrayEquals("Streaming chunked base64 decode", decoded, output);

         // I always wanted to do this! (wrap encoder with decoder etc etc).
         byteOut = new ByteArrayOutputStream();
         out = byteOut;
         for (int i = 0; i < 10; i++) {
             out = new Base64OutputStream(out, false);
             out = new Base64OutputStream(out, true, chunkSize, separator);
         }
         out.write(decoded);
         out.close();
         output = byteOut.toByteArray();

         assertArrayEquals("Streaming chunked base64 wrap-wrap-wrap!", decoded, output);
     }

     /**
      * Test method does three tests on the supplied data: 1. encoded ---[DECODE]--> decoded 2. decoded ---[ENCODE]-->
      * encoded 3. decoded ---[WRAP-WRAP-WRAP-etc...] --> decoded
      * <p/>
      * By "[WRAP-WRAP-WRAP-etc...]" we mean situation where the Base64OutputStream wraps itself in encode and decode
      * mode over and over again.
      *
      * @param encoded
      *            base64 encoded data
      * @param decoded
      *            the data from above, but decoded
      * @param chunkSize
      *            chunk size (line-length) of the base64 encoded data.
      * @param separator
      *            Line separator in the base64 encoded data.
      * @throws Exception
      *             Usually signifies a bug in the Base64 commons-codec implementation.
      */
     private void testByteByByte(final byte[] encoded, final byte[] decoded, final int chunkSize, final byte[] separator) throws Exception {

         // Start with encode.
         ByteArrayOutputStream byteOut = new ByteArrayOutputStream();
         OutputStream out = new Base64OutputStream(byteOut, true, chunkSize, separator);
         for (final byte element : decoded) {
             out.write(element);
         }
         out.close();
         byte[] output = byteOut.toByteArray();
         assertArrayEquals("Streaming byte-by-byte base64 encode", encoded, output);

         // Now let's try decode.
         byteOut = new ByteArrayOutputStream();
         out = new Base64OutputStream(byteOut, false);
         for (final byte element : encoded) {
             out.write(element);
         }
         out.close();
         output = byteOut.toByteArray();
         assertArrayEquals("Streaming byte-by-byte base64 decode", decoded, output);

         // Now let's try decode with tonnes of flushes.
         byteOut = new ByteArrayOutputStream();
         out = new Base64OutputStream(byteOut, false);
         for (final byte element : encoded) {
             out.write(element);
             out.flush();
         }
         out.close();
         output = byteOut.toByteArray();
         assertArrayEquals("Streaming byte-by-byte flush() base64 decode", decoded, output);

         // I always wanted to do this! (wrap encoder with decoder etc etc).
         byteOut = new ByteArrayOutputStream();
         out = byteOut;
         for (int i = 0; i < 10; i++) {
             out = new Base64OutputStream(out, false);
             out = new Base64OutputStream(out, true, chunkSize, separator);
         }
         for (final byte element : decoded) {
             out.write(element);
         }
         out.close();
         output = byteOut.toByteArray();

         assertArrayEquals("Streaming byte-by-byte base64 wrap-wrap-wrap!", decoded, output);
     }

     /**
      * Tests Base64OutputStream.write for expected IndexOutOfBoundsException conditions.
      *
      * @throws Exception
      *             for some failure scenarios.
      */
     @Test
     public void testWriteOutOfBounds() throws Exception {
         final byte[] buf = new byte[1024];
         final ByteArrayOutputStream bout = new ByteArrayOutputStream();
         try (final Base64OutputStream out = new Base64OutputStream(bout)) {

             try {
                 out.write(buf, -1, 1);
                 fail("Expected Base64OutputStream.write(buf, -1, 1) to throw a IndexOutOfBoundsException");
             } catch (final IndexOutOfBoundsException ioobe) {
                 // Expected
             }

             try {
                 out.write(buf, 1, -1);
                 fail("Expected Base64OutputStream.write(buf, 1, -1) to throw a IndexOutOfBoundsException");
             } catch (final IndexOutOfBoundsException ioobe) {
                 // Expected
             }

             try {
                 out.write(buf, buf.length + 1, 0);
                 fail("Expected Base64OutputStream.write(buf, buf.length + 1, 0) to throw a IndexOutOfBoundsException");
             } catch (final IndexOutOfBoundsException ioobe) {
                 // Expected
             }

             try {
                 out.write(buf, buf.length - 1, 2);
                 fail("Expected Base64OutputStream.write(buf, buf.length - 1, 2) to throw a IndexOutOfBoundsException");
             } catch (final IndexOutOfBoundsException ioobe) {
                 // Expected
             }
         }
     }

     /**
      * Tests Base64OutputStream.write(null).
      *
      * @throws Exception
      *             for some failure scenarios.
      */
     @Test
     public void testWriteToNullCoverage() throws Exception {
         final ByteArrayOutputStream bout = new ByteArrayOutputStream();
         try (final Base64OutputStream out = new Base64OutputStream(bout)) {
             out.write(null, 0, 0);
             fail("Expcted Base64OutputStream.write(null) to throw a NullPointerException");
         } catch (final NullPointerException e) {
             // Expected
         }
     }

     /**
      * Test strict decoding.
      *
      * @throws Exception
      *             for some failure scenarios.
      */
     @Test
     public void testStrictDecoding() throws Exception {
         for (final String s : Base64Test.BASE64_IMPOSSIBLE_CASES) {
             final byte[] encoded = StringUtils.getBytesUtf8(s);
             ByteArrayOutputStream bout = new ByteArrayOutputStream();
             Base64OutputStream out = new Base64OutputStream(bout, false);
             // Default is lenient decoding; it should not throw
             assertFalse(out.isStrictDecoding());
             out.write(encoded);
             out.close();
             assertTrue(bout.size() > 0);

             // Strict decoding should throw
             bout = new ByteArrayOutputStream();
             out = new Base64OutputStream(bout, false, 0, null, CodecPolicy.STRICT);
             assertTrue(out.isStrictDecoding());
             try {
                 out.write(encoded);
                 out.close();
                 fail();
             } catch (final IllegalArgumentException ex) {
                 // expected
             }
         }
     }
 }
	/*
	* Licensed to the Apache Software Foundation (ASF) under one or more
	* 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
	* 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.commons.codec.binary;

	import java.io.ByteArrayOutputStream;
	import java.io.OutputStream;

	import org.apache.commons.codec.CodecPolicy;
	import org.junit.Test;

	import static org.junit.Assert.assertArrayEquals;
	import static org.junit.Assert.assertEquals;
	import static org.junit.Assert.assertFalse;
	import static org.junit.Assert.assertTrue;
	import static org.junit.Assert.fail;

	/**
	* @since 1.4
	*/
	public class Base64OutputStreamTest {

	private final static byte[] CR_LF = {(byte) '\r', (byte) '\n'};

	private final static byte[] LF = {(byte) '\n'};

	private static final String STRING_FIXTURE = "Hello World";

	/**
	* Test the Base64OutputStream implementation against the special NPE inducing input
	* identified in the CODEC-98 bug.
	*
	* @throws Exception for some failure scenarios.
	*/
	@Test
	public void testCodec98NPE() throws Exception {
	final byte[] codec98 = StringUtils.getBytesUtf8(Base64TestData.CODEC_98_NPE);
	final byte[] codec98_1024 = new byte[1024];
	System.arraycopy(codec98, 0, codec98_1024, 0, codec98.length);
	final ByteArrayOutputStream data = new ByteArrayOutputStream(1024);
	try (final Base64OutputStream stream = new Base64OutputStream(data, false)) {
	stream.write(codec98_1024, 0, 1024);
	}

	final byte[] decodedBytes = data.toByteArray();
	final String decoded = StringUtils.newStringUtf8(decodedBytes);
	assertEquals("codec-98 NPE Base64OutputStream", Base64TestData.CODEC_98_NPE_DECODED, decoded);
	}


	/**
	* Test the Base64OutputStream implementation against empty input.
	*
	* @throws Exception
	* for some failure scenarios.
	*/
	@Test
	public void testBase64EmptyOutputStreamMimeChunkSize() throws Exception {
	testBase64EmptyOutputStream(BaseNCodec.MIME_CHUNK_SIZE);
	}

	/**
	* Test the Base64OutputStream implementation against empty input.
	*
	* @throws Exception
	* for some failure scenarios.
	*/
	@Test
	public void testBase64EmptyOutputStreamPemChunkSize() throws Exception {
	testBase64EmptyOutputStream(BaseNCodec.PEM_CHUNK_SIZE);
	}

	private void testBase64EmptyOutputStream(final int chunkSize) throws Exception {
	final byte[] emptyEncoded = new byte[0];
	final byte[] emptyDecoded = new byte[0];
	testByteByByte(emptyEncoded, emptyDecoded, chunkSize, CR_LF);
	testByChunk(emptyEncoded, emptyDecoded, chunkSize, CR_LF);
	}

	/**
	* Test the Base64OutputStream implementation
	*
	* @throws Exception
	* for some failure scenarios.
	*/
	@Test
	public void testBase64OutputStreamByChunk() throws Exception {
	// Hello World test.
	byte[] encoded = StringUtils.getBytesUtf8("SGVsbG8gV29ybGQ=\r\n");
	byte[] decoded = StringUtils.getBytesUtf8(STRING_FIXTURE);
	testByChunk(encoded, decoded, BaseNCodec.MIME_CHUNK_SIZE, CR_LF);

	// Single Byte test.
	encoded = StringUtils.getBytesUtf8("AA==\r\n");
	decoded = new byte[]{(byte) 0};
	testByChunk(encoded, decoded, BaseNCodec.MIME_CHUNK_SIZE, CR_LF);

	// OpenSSL interop test.
	encoded = StringUtils.getBytesUtf8(Base64TestData.ENCODED_64_CHARS_PER_LINE);
	decoded = BaseNTestData.DECODED;
	testByChunk(encoded, decoded, BaseNCodec.PEM_CHUNK_SIZE, LF);

	// Single Line test.
	final String singleLine = Base64TestData.ENCODED_64_CHARS_PER_LINE.replaceAll("\n", "");
	encoded = StringUtils.getBytesUtf8(singleLine);
	decoded = BaseNTestData.DECODED;
	testByChunk(encoded, decoded, 0, LF);

	// test random data of sizes 0 thru 150
	final BaseNCodec codec = new Base64(0, null, false);
	for (int i = 0; i <= 150; i++) {
	final byte[][] randomData = BaseNTestData.randomData(codec, i);
	encoded = randomData[1];
	decoded = randomData[0];
	testByChunk(encoded, decoded, 0, LF);
	}
	}

	/**
	* Test the Base64OutputStream implementation
	*
	* @throws Exception
	* for some failure scenarios.
	*/
	@Test
	public void testBase64OutputStreamByteByByte() throws Exception {
	// Hello World test.
	byte[] encoded = StringUtils.getBytesUtf8("SGVsbG8gV29ybGQ=\r\n");
	byte[] decoded = StringUtils.getBytesUtf8(STRING_FIXTURE);
	testByteByByte(encoded, decoded, 76, CR_LF);

	// Single Byte test.
	encoded = StringUtils.getBytesUtf8("AA==\r\n");
	decoded = new byte[]{(byte) 0};
	testByteByByte(encoded, decoded, 76, CR_LF);

	// OpenSSL interop test.
	encoded = StringUtils.getBytesUtf8(Base64TestData.ENCODED_64_CHARS_PER_LINE);
	decoded = BaseNTestData.DECODED;
	testByteByByte(encoded, decoded, 64, LF);

	// Single Line test.
	final String singleLine = Base64TestData.ENCODED_64_CHARS_PER_LINE.replaceAll("\n", "");
	encoded = StringUtils.getBytesUtf8(singleLine);
	decoded = BaseNTestData.DECODED;
	testByteByByte(encoded, decoded, 0, LF);

	// test random data of sizes 0 thru 150
	final BaseNCodec codec = new Base64(0, null, false);
	for (int i = 0; i <= 150; i++) {
	final byte[][] randomData = BaseNTestData.randomData(codec, i);
	encoded = randomData[1];
	decoded = randomData[0];
	testByteByByte(encoded, decoded, 0, LF);
	}
	}

	/**
	* Test method does three tests on the supplied data: 1. encoded ---[DECODE]--> decoded 2. decoded ---[ENCODE]-->
	* encoded 3. decoded ---[WRAP-WRAP-WRAP-etc...] --> decoded
	* <p/>
	* By "[WRAP-WRAP-WRAP-etc...]" we mean situation where the Base64OutputStream wraps itself in encode and decode
	* mode over and over again.
	*
	* @param encoded
	* base64 encoded data
	* @param decoded
	* the data from above, but decoded
	* @param chunkSize
	* chunk size (line-length) of the base64 encoded data.
	* @param separator
	* Line separator in the base64 encoded data.
	* @throws Exception
	* Usually signifies a bug in the Base64 commons-codec implementation.
	*/
	private void testByChunk(final byte[] encoded, final byte[] decoded, final int chunkSize, final byte[] separator) throws Exception {

	// Start with encode.
	ByteArrayOutputStream byteOut = new ByteArrayOutputStream();
	OutputStream out = new Base64OutputStream(byteOut, true, chunkSize, separator);
	out.write(decoded);
	out.close();
	byte[] output = byteOut.toByteArray();
	assertArrayEquals("Streaming chunked base64 encode", encoded, output);

	// Now let's try decode.
	byteOut = new ByteArrayOutputStream();
	out = new Base64OutputStream(byteOut, false);
	out.write(encoded);
	out.close();
	output = byteOut.toByteArray();
	assertArrayEquals("Streaming chunked base64 decode", decoded, output);

	// I always wanted to do this! (wrap encoder with decoder etc etc).
	byteOut = new ByteArrayOutputStream();
	out = byteOut;
	for (int i = 0; i < 10; i++) {
	out = new Base64OutputStream(out, false);
	out = new Base64OutputStream(out, true, chunkSize, separator);
	}
	out.write(decoded);
	out.close();
	output = byteOut.toByteArray();

	assertArrayEquals("Streaming chunked base64 wrap-wrap-wrap!", decoded, output);
	}

	/**
	* Test method does three tests on the supplied data: 1. encoded ---[DECODE]--> decoded 2. decoded ---[ENCODE]-->
	* encoded 3. decoded ---[WRAP-WRAP-WRAP-etc...] --> decoded
	* <p/>
	* By "[WRAP-WRAP-WRAP-etc...]" we mean situation where the Base64OutputStream wraps itself in encode and decode
	* mode over and over again.
	*
	* @param encoded
	* base64 encoded data
	* @param decoded
	* the data from above, but decoded
	* @param chunkSize
	* chunk size (line-length) of the base64 encoded data.
	* @param separator
	* Line separator in the base64 encoded data.
	* @throws Exception
	* Usually signifies a bug in the Base64 commons-codec implementation.
	*/
	private void testByteByByte(final byte[] encoded, final byte[] decoded, final int chunkSize, final byte[] separator) throws Exception {

	// Start with encode.
	ByteArrayOutputStream byteOut = new ByteArrayOutputStream();
	OutputStream out = new Base64OutputStream(byteOut, true, chunkSize, separator);
	for (final byte element : decoded) {
	out.write(element);
	}
	out.close();
	byte[] output = byteOut.toByteArray();
	assertArrayEquals("Streaming byte-by-byte base64 encode", encoded, output);

	// Now let's try decode.
	byteOut = new ByteArrayOutputStream();
	out = new Base64OutputStream(byteOut, false);
	for (final byte element : encoded) {
	out.write(element);
	}
	out.close();
	output = byteOut.toByteArray();
	assertArrayEquals("Streaming byte-by-byte base64 decode", decoded, output);

	// Now let's try decode with tonnes of flushes.
	byteOut = new ByteArrayOutputStream();
	out = new Base64OutputStream(byteOut, false);
	for (final byte element : encoded) {
	out.write(element);
	out.flush();
	}
	out.close();
	output = byteOut.toByteArray();
	assertArrayEquals("Streaming byte-by-byte flush() base64 decode", decoded, output);

	// I always wanted to do this! (wrap encoder with decoder etc etc).
	byteOut = new ByteArrayOutputStream();
	out = byteOut;
	for (int i = 0; i < 10; i++) {
	out = new Base64OutputStream(out, false);
	out = new Base64OutputStream(out, true, chunkSize, separator);
	}
	for (final byte element : decoded) {
	out.write(element);
	}
	out.close();
	output = byteOut.toByteArray();

	assertArrayEquals("Streaming byte-by-byte base64 wrap-wrap-wrap!", decoded, output);
	}

	/**
	* Tests Base64OutputStream.write for expected IndexOutOfBoundsException conditions.
	*
	* @throws Exception
	* for some failure scenarios.
	*/
	@Test
	public void testWriteOutOfBounds() throws Exception {
	final byte[] buf = new byte[1024];
	final ByteArrayOutputStream bout = new ByteArrayOutputStream();
	try (final Base64OutputStream out = new Base64OutputStream(bout)) {

	try {
	out.write(buf, -1, 1);
	fail("Expected Base64OutputStream.write(buf, -1, 1) to throw a IndexOutOfBoundsException");
	} catch (final IndexOutOfBoundsException ioobe) {
	// Expected
	}

	try {
	out.write(buf, 1, -1);
	fail("Expected Base64OutputStream.write(buf, 1, -1) to throw a IndexOutOfBoundsException");
	} catch (final IndexOutOfBoundsException ioobe) {
	// Expected
	}

	try {
	out.write(buf, buf.length + 1, 0);
	fail("Expected Base64OutputStream.write(buf, buf.length + 1, 0) to throw a IndexOutOfBoundsException");
	} catch (final IndexOutOfBoundsException ioobe) {
	// Expected
	}

	try {
	out.write(buf, buf.length - 1, 2);
	fail("Expected Base64OutputStream.write(buf, buf.length - 1, 2) to throw a IndexOutOfBoundsException");
	} catch (final IndexOutOfBoundsException ioobe) {
	// Expected
	}
	}
	}

	/**
	* Tests Base64OutputStream.write(null).
	*
	* @throws Exception
	* for some failure scenarios.
	*/
	@Test
	public void testWriteToNullCoverage() throws Exception {
	final ByteArrayOutputStream bout = new ByteArrayOutputStream();
	try (final Base64OutputStream out = new Base64OutputStream(bout)) {
	out.write(null, 0, 0);
	fail("Expcted Base64OutputStream.write(null) to throw a NullPointerException");
	} catch (final NullPointerException e) {
	// Expected
	}
	}

	/**
	* Test strict decoding.
	*
	* @throws Exception
	* for some failure scenarios.
	*/
	@Test
	public void testStrictDecoding() throws Exception {
	for (final String s : Base64Test.BASE64_IMPOSSIBLE_CASES) {
	final byte[] encoded = StringUtils.getBytesUtf8(s);
	ByteArrayOutputStream bout = new ByteArrayOutputStream();
	Base64OutputStream out = new Base64OutputStream(bout, false);
	// Default is lenient decoding; it should not throw
	assertFalse(out.isStrictDecoding());
	out.write(encoded);
	out.close();
	assertTrue(bout.size() > 0);

	// Strict decoding should throw
	bout = new ByteArrayOutputStream();
	out = new Base64OutputStream(bout, false, 0, null, CodecPolicy.STRICT);
	assertTrue(out.isStrictDecoding());
	try {
	out.write(encoded);
	out.close();
	fail();
	} catch (final IllegalArgumentException ex) {
	// expected
	}
	}
	}
	}