Subscription addSubscription(final String channel, final int streamId)
    {
        return addSubscription(channel, streamId, defaultAvailableImageHandler, defaultUnavailableImageHandler);
    }
@Test
    void addSubscriptionShouldNotifyMediaDriver()
    {
        whenReceiveBroadcastOnMessage(
            ControlProtocolEvents.ON_SUBSCRIPTION_READY,
            subscriptionReadyBuffer,
            (buffer) ->
            {
                subscriptionReady.correlationId(CORRELATION_ID);
                return SubscriptionReadyFlyweight.LENGTH;
            });

        conductor.addSubscription(CHANNEL, STREAM_ID_1);

        verify(driverProxy).addSubscription(CHANNEL, STREAM_ID_1);
    }