### Question:
TunnelFactory { public void setSerializers( List<TunnelSerializer<?>> serializers ) { if ( serializers != null ) { this.serializers.addAll( serializers ); } populateSerializerMap(); } TunnelFactory(); void setSerializers( List<TunnelSerializer<?>> serializers ); void populateSerializerMap( ); void addSerializer( TunnelSerializer<?> serializer ); void removeSerializer( TunnelSerializer<?> serializer ); TunnelSerializer getSerializer( Class clazz ); TunnelOutput createOutput( ObjectOutputStream outputStream ); TunnelInput createInput( ObjectInputStream objectInputStream );  }### Answer:
@Test public void setSerializers() throws Exception { Map<Class, TunnelSerializer> serializerMap = factory.getSerializerMap(); assertNotNull( serializerMap ); assertTrue( serializerMap.containsKey( UUID.class ) ); }