writeIndex();
        }

        public void onOutput(long classId, TestOutputEvent outputEvent) {
            onOutput(classId, 0, outputEvent);
        }

        public void onOutput(long classId, long testId, TestOutputEvent outputEvent) {
            boolean stdout = outputEvent.getDestination() == TestOutputEvent.Destination.StdOut;
            mark(classId, testId, stdout);

        private final Serializer<TestOutputEvent.Destination> destinationSerializer = new BaseSerializerFactory().getSerializerFor(TestOutputEvent.Destination.class);

        @Override
        public DefaultTestOutputEvent read(Decoder decoder) throws Exception {
            TestOutputEvent.Destination destination = destinationSerializer.read(decoder);