suggested fix for "PRECONDITION_FAILED - invalid arg 'x-expires' for queue '....'

[jarikp]

Hi, I get this error in with the latest version of Rebus.RabbitMQ (5.1.0.0) from RabbitMq

"PRECONDITION_FAILED - invalid arg 'x-expires' for queue '…' in vhost '/': {value_zero,0}", classId=50, methodId=10, cause="

The error occurs when the bus is created using .InputQueueOptions() configurer, with SetAutoDelete(false). It seems that the config builder adds "x-expires" regardless of the auto-delete value, wich means "x-expires" has value 0 (the default of the ttlMs parameter) when auto-delete is false.

I suggest that "x-expires" is only included, if the autoDelete argument is true and the ttl is a positive number (exception otherwise, as before).

I was not sure how to fit a proper unit tests for your project, but I have included a very simple start up tests of the bus, that fail before this fix and pass when the fix is include.

Please let me know, if this is a correct solution.

Best regards
Jarik

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