RE: Intro to dejagnu: Help!

[Yan Jiang]

Hi, Paulo.

first of all, expect and dejagnu is good at testing interactive project.
If the result of yout test cases can be decided by the input and output 
pair.
then it's the right thing for you.
other wise you really should look for another tool.

secondly.
I know it's pretty hard to find expect tutorial on internet.
But i think it's easier for you to find some tcl tutorial.
expect is based on Tcl.

thirdly:)
there is a tool in the expect release project, called "autoexpect".
try>>
$ autoexpect -f testcase1.exp
$ run_your_project
> > input something
> > you got the output here.
$ pkill autoexpect

after this , you will find a expect script "testcase1.exp" in the directory.
use an editor to open it.

autoexpect will record the input and output of the current running process.
then all you have to do is to do a little modification to use it as one of 
your case.

Finally, a brief into to expect.
common used expect way is like this

set timeout n; # this is optional, be default n=10 seconds.
expect{
   -re "pattern1" { send "pass" }
   -re "pattern2" { send "fail"   }
   timeout          { send "time out" }
}

expect will read the output of the process,
if output starts to match pattern1, then pass will be print-out.
match pattern2, fail will be print-out.
otherwise timeout will be print-out.

set timeout -1. then expect will encounter timetout.

Hope it could help.:)

some expect scripts in dejagnu release packet might also be helpful.

Best wishes.



> From: "Paulo J. Matos" <address@hidden>
> Reply-To: address@hidden
> To: address@hidden
> Subject: Intro to dejagnu: Help!
> Date: Thu, 8 Jun 2006 14:35:33 +0100
>
> Hi all,
>
> I'm searching for a way to test a software I'm developing for some
> time ago. Since I'm using autotools, seems dejagnu seems the way to
> go. But I don't know expect and don't have the slightest idea what do
> to. I've briefly read through the manual but it doesn't really 'teach
> you'. I don't want to know expect besides scripts to work with
> dejagnu. I would like someone to tell me where to start or a quick
> tutorial in it. From what I understand it seems it is easy to test my
> program.
> My program is called with some command line arguments and then it
> output 3 values "yes", "no", "unknown". In fact, this could be done
> with a bash script but using dejagnu seems more integrated. Given the
> command line argument (a file), I know the correct output. I just want
> to check if the program is giving the correct output.
>
> Another more technical issue is that my program may or may not use
> GMP, this is set from within configure by using the --enable-gmp. This
> changes the program output, what might be before "unknown", can be now
> "yes" or "no". So I need different testsuites for the program compiled
> with or without --enable-gmp. Any ideas on how to do this?
>
> Thanks in advance,
>
> --
> Paulo Jorge Matos - pocm at sat inesc-id pt
> Web: http://sat.inesc-id.pt/~pocm
> Computer and Software Engineering
> INESC-ID - SAT Group
>
>
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