Notification

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published records the notice, including its topic. The notice is not in handled.

See Event Types.

class OrderCreatedNotice(cqrs.NotificationEvent):
    event_name: str = "order_created"
    topic: str = "order_events"

await harness.mediator.send(CreateOrder(sku="book"))
harness.published.assert_one(OrderCreatedNotice, topic="order_events")
assert not harness.handled.contains(OrderCreatedNotice)

Library example: examples/testing/domain_and_notification.py.