Event Mediator

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invocations records the handler, and the method is handle. EventMediator goes through EventDispatcher, not EventEmitter, so this is not the handled journal.

See Event Mediator.

await harness.event_mediator.send(OrderCreated(order_id="1"))
harness.invocations.assert_entered(AuditHandler)
assert harness.invocations.of(AuditHandler)[0].method == "handle"

Library example: examples/testing/event_mediator.py.