listener.transferInitiated(transferInitiatedEvent);
        listener.transferStarted(transferStartedEvent);
        listener.transferProgressed(transferProgressedEvent);
        listener.transferSucceeded(transferSucceededEvent);

        Thread.sleep(500); // to make sure queue is processed, cancellation applied

        Mockito.verify(delegate).transferInitiated(transferInitiatedEvent);

        this.out = (out != null) ? out : System.out;
    }

    @Override
    public void transferInitiated(TransferEvent event) {
        String message = event.getRequestType() == TransferEvent.RequestType.PUT ? "Uploading" : "Downloading";

        println(
                "transferInitiated",
                message + ": " + event.getResource().getRepositoryUrl()

        super(out);
        this.printResourceNames = printResourceNames;
    }

    @Override
    public void transferInitiated(TransferEvent event) {
        overridePreviousTransfer(event);

        super.transferInitiated(event);
    }

    @Override
    public void transferCorrupted(TransferEvent event) throws TransferCancelledException {
        overridePreviousTransfer(event);

    }

    // TODO should we deprecate?
    public Slf4jMavenTransferListener(Logger out) {
        this.out = out;
    }

    @Override
    public void transferInitiated(TransferEvent event) {
        String action = event.getRequestType() == TransferEvent.RequestType.PUT ? "Uploading" : "Downloading";

                TransferEvent.EventType type = transferEvent.getType();
                try {
                    switch (type) {
                        case INITIATED:
                            delegate.transferInitiated(transferEvent);
                            break;
                        case STARTED:
                            delegate.transferStarted(transferEvent);
                            break;

        class TransferListener extends AbstractTransferListener {
            List<TransferEvent> events = new ArrayList<>();

            @Override
            public void transferInitiated(TransferEvent transferEvent) {
                events.add(transferEvent);
            }
        }

        TransferListener listener = new TransferListener();