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Test race condition? (unit test?) [message #175583]

Mon, 10 October 2011 08:16

Simon
Messages: 29
Registered: February 2011

Karma:

Junior Member

Hi,

I have written a very simple file based lock/unlock system.
the way it works is as follows.

process A looks for File 'X', if file 'X' does not exists it tries to
creates an empty file, 'Xa', and locks it, it then creates file 'X' and
deletes file 'Xa'.

process B is also looking for File 'X', if file 'X' does not exists it
tries to create 'Xa', on failure it waits for a seconds and tries to
obtain the lock again. Once/if the lock is obtained, it looks for file
'X' again and either uses it or creates it.

process C looks for file 'X', if file 'X' exists it will use it.

I try to write as much unit tests as possible and, as this is an
important process, I would like to test the process above.

1- Can you think of any way I could test the above? As far as I know you
cannot start multiple threads in php, (even in a dev environment).

2- Is there a better way of getting a lock like I am doing above?

Many thanks

Simon

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[Message index]

		Test race condition? (unit test?) By: Simon on Mon, 10 October 2011 08:16
		Re: Test race condition? (unit test?) By: Jerry Stuckle on Mon, 10 October 2011 12:36
		Re: Test race condition? (unit test?) By: Simon on Mon, 10 October 2011 13:48
		Re: Test race condition? (unit test?) By: The Natural Philosoph on Mon, 10 October 2011 14:43
		Re: Test race condition? (unit test?) By: Jerry Stuckle on Mon, 10 October 2011 17:42

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