### Question:
BaseNCodec implements BinaryEncoder, BinaryDecoder { protected boolean containsAlphabetOrPad(final byte[] arrayOctet) { if (arrayOctet == null) { return false; } for (final byte element : arrayOctet) { if (pad == element || isInAlphabet(element)) { return true; } } return false; } protected  BaseNCodec(final int unencodedBlockSize, final int encodedBlockSize,
                         final int lineLength, final int chunkSeparatorLength); protected  BaseNCodec(final int unencodedBlockSize, final int encodedBlockSize,
                         final int lineLength, final int chunkSeparatorLength, final byte pad); @Override Object encode(final Object obj); String encodeToString(final byte[] pArray); String encodeAsString(final byte[] pArray); @Override Object decode(final Object obj); byte[] decode(final String pArray); @Override byte[] decode(final byte[] pArray); @Override byte[] encode(final byte[] pArray); boolean isInAlphabet(final byte[] arrayOctet, final boolean allowWSPad); boolean isInAlphabet(final String basen); long getEncodedLength(final byte[] pArray); static final int MIME_CHUNK_SIZE; static final int PEM_CHUNK_SIZE; }### Answer:
@Test public void testContainsAlphabetOrPad() { assertFalse(codec.containsAlphabetOrPad(null)); assertFalse(codec.containsAlphabetOrPad(new byte[]{})); assertTrue(codec.containsAlphabetOrPad("OK".getBytes())); assertTrue(codec.containsAlphabetOrPad("OK ".getBytes())); assertFalse(codec.containsAlphabetOrPad("ok ".getBytes())); assertTrue(codec.containsAlphabetOrPad(new byte[]{codec.pad})); }