Parallel Handlers

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Both handler classes are on invocations. Do not assert their order.

See Parallel Event Processing.

async with test_harness(
    container,
    commands_mapper=commands_mapper,
    domain_events_mapper=domain_events_mapper,
    concurrent_event_handle_enable=True,
    scope_strategy=cqrs.ScopeStrategy.HANDLER,
) as harness:
    await harness.mediator.send(CreateOrder(sku="book"))
    harness.invocations.assert_entered(AuditHandler)
    harness.invocations.assert_entered(SearchHandler)

Library example: examples/testing/parallel_handlers.py.