Struct KafkaTestSubscriber 

pub struct KafkaTestSubscriber { /* private fields */ }

In-process subscriber on one topic name.

Yielded messages settle like the routing contract expects: ack finalizes, nack(true) re-enqueues to this same subscription, nack(false) drops. The real transport’s committed-position semantics (holes, watermarks, redelivery on rebalance) are deliberately not simulated.

Implementations

impl KafkaTestSubscriber

pub fn topic(&self) -> &str

The subscribed topic name(s), joined with , when there are several.

Trait Implementations

impl BatchSubscriber for KafkaTestSubscriber

fn batches( &mut self, ) -> impl Stream<Item = Result<Self::Batch, <Self as Subscriber>::Error>> + Send + '_

Streams non-empty pages natively: each waits for one delivery, then drains whatever else is already enqueued (mirroring the real subscriber’s drain-what-is-fetched behavior).

Cancel safety

Same guarantees as Subscriber::stream: cancel safe between polls.

type Batch = Vec<KafkaTestMessage>

Container yielded by batches. Implementations choose between Vec, custom iterators, or anything else that yields the underlying Subscriber::Message.

impl Debug for KafkaTestSubscriber

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Drop for KafkaTestSubscriber

fn drop(&mut self)

Executes the destructor for this type.

fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)

Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned.

impl Subscriber for KafkaTestSubscriber

fn stream( &mut self, ) -> impl Stream<Item = Result<Self::Message, Self::Error>> + Send + '_

Streams injected deliveries; never yields an error.

Cancel safety

Cancel safe and re-enterable: the receiver is polled in place, so dropping the returned stream loses nothing and stream can be called again.

type Message = KafkaTestMessage

The message type yielded by this subscriber.

type Error = KafkaError

The error type yielded by the stream when delivery fails.