### Question:
StringSerializer extends AbstractElementSerializer<String> { private StringSerializer() { super( StringComparator.INSTANCE ); } private  StringSerializer();  StringSerializer( Comparator<String> comparator ); static String deserialize( byte[] in ); static String deserialize( byte[] in, int start ); String fromBytes( byte[] in ); String fromBytes( byte[] in, int start ); static byte[] serialize( byte[] buffer, int start, String element ); byte[] serialize( String element ); String deserialize( BufferHandler bufferHandler ); String deserialize( ByteBuffer buffer ); @Override int compare( String type1, String type2 ); static final StringSerializer INSTANCE; }### Answer:
@Test public void testStringSerializer() throws IOException { String value = null; byte[] result = serializer.serialize( value ); assertEquals( 4, result.length ); assertEquals( ( byte ) 0xFF, result[0] ); assertEquals( ( byte ) 0xFF, result[1] ); assertEquals( ( byte ) 0xFF, result[2] ); assertEquals( ( byte ) 0xFF, result[3] ); assertEquals( value, serializer.deserialize( new BufferHandler( result ) ) ); value = ""; result = serializer.serialize( value ); assertEquals( 4, result.length ); assertEquals( ( byte ) 0x00, result[0] ); assertEquals( ( byte ) 0x00, result[1] ); assertEquals( ( byte ) 0x00, result[2] ); assertEquals( ( byte ) 0x00, result[3] ); assertEquals( value, serializer.deserialize( new BufferHandler( result ) ) ); value = "test"; result = serializer.serialize( value ); assertEquals( 8, result.length ); assertEquals( ( byte ) 0x00, result[0] ); assertEquals( ( byte ) 0x00, result[1] ); assertEquals( ( byte ) 0x00, result[2] ); assertEquals( ( byte ) 0x04, result[3] ); assertEquals( 't', result[4] ); assertEquals( 'e', result[5] ); assertEquals( 's', result[6] ); assertEquals( 't', result[7] ); assertEquals( value, serializer.deserialize( new BufferHandler( result ) ) ); value = "L\u00E9charny"; result = serializer.serialize( value ); assertEquals( 13, result.length ); assertEquals( ( byte ) 0x00, result[0] ); assertEquals( ( byte ) 0x00, result[1] ); assertEquals( ( byte ) 0x00, result[2] ); assertEquals( ( byte ) 0x09, result[3] ); assertEquals( 'L', result[4] ); assertEquals( ( byte ) 0xC3, result[5] ); assertEquals( ( byte ) 0xA9, result[6] ); assertEquals( 'c', result[7] ); assertEquals( 'h', result[8] ); assertEquals( 'a', result[9] ); assertEquals( 'r', result[10] ); assertEquals( 'n', result[11] ); assertEquals( 'y', result[12] ); assertEquals( value, serializer.deserialize( new BufferHandler( result ) ) ); }