### Question:
TLVList implements Serializable, Loggeable { public byte[] pack() { ByteBuffer buffer = ByteBuffer.allocate(516); for (TLVMsg tlv : tags) buffer.put(tlv.getTLV()); byte[] b = new byte[buffer.position()]; buffer.flip(); buffer.get(b); return b; } TLVList(); void unpack(byte[] buf); List<TLVMsg> getTags(); Enumeration<TLVMsg> elements(); void unpack(byte[] buf, int offset); void append(TLVMsg tlv); TLVList append(int tag, byte[] value); TLVList append(int tag, String value); void deleteByIndex(int index); void deleteByTag(int tag); TLVMsg find(int tag); int findIndex(int tag); TLVMsg findNextTLV(); TLVMsg index(int index); byte[] pack(); String getString(int tag); byte[] getValue(int tag); boolean hasTag(int tag); @Override void dump(PrintStream p, String indent);  }### Answer:
@Test public void testPack() { byte[] result = instance.pack(); assertEquals(0, result.length); }