public async Task Verify_emittingCommand()
{
var orderId = new OrderId(103);
var evt = new OrderPlaced(orderId);
await ApplyEventOnSaga(evt).ConfigureAwait(false);
var sagaId = _listener.GetCorrelationId(evt);
var changesets = await _persistence.EventStoreReadChangeset(sagaId).ConfigureAwait(false);
var changeset = changesets.Single();
Assert.That(changeset.Events.Length, Is.EqualTo(1));
var @event = changeset.Events.Single();
Assert.That(@event, Is.InstanceOf <MessageReaction>(), "We are expecting a messagereaction as payload");
MessageReaction reaction = (MessageReaction)@event;
Assert.That(reaction.MessagesOut.Length, Is.EqualTo(1), "We are expeting a messageout when order is placed");
}