[erlang-questions] eunit failure - "*** test module not found ***"

French, Mike <>
Tue Mar 16 18:39:15 CET 2010


Graeme,

I think this occurs when you omit a leading underscore 
on an eunit macro in a test-generating function.

For example, say you write a simple test function using a basic macro:

  basic_test() -> ?assert( 1 + 1 =:= 2 ).

Then you decide to convert it to a test-generating function, you should 
append  an '_' to the function name, and 
prepend an '_' to the macro    name:

  fancy_test_() -> ?_assert( 1 + 1 =:= 2 ).

but if you forget to change the macro name:

  bad_test_() -> ?assert( 1 + 1 =:= 2 ).

then you get the error as you describe:

  undefined
  *** test module not found ***
  ::ok
  =======================================================
    Failed: 0.  Skipped: 0.  Passed: 0.
  One or more tests were cancelled.
  error

The 'ok' value in the error message is the result of 
evaluating the function returned by the macro,
so your mistake is on a macro that returns 'true'.

Mike





> -----Original Message-----
> From:  
> [mailto:]On
> Behalf Of Graeme Defty
> Sent: 16 March 2010 15:34
> To: 
> Subject: [erlang-questions] eunit failure - "*** test module not found
> ***"
> 
> 
> Hi,
> 
> I have a problem executing eunit tests in my current environment
> (which i am sure used to work fine - I think - curse this 
> failing memory :-(  )
> 
> Anyway, I have included eunit in my source:
> 
>  -include_lib("eunit/include/eunit.hrl").
> 
> and it compiles without complaint, but when i try to run the 
> tests it fails:
> 
>  4> eunit:test(csv).
>  undefined
>  *** test module not found ***
>  ::true
> 
>  =======================================================
>    Failed: 0.  Skipped: 0.  Passed: 0.
>  One or more tests were canceled.
>  error
> 
> I can see the auto-generated test functions using module_info/0 and
> can even execute them manually.
> 
> I am clearly not accessing a library, and I am sure I have missed some
> simple step ( a parameter to the erl
> command perhaps?) or something equally dumb, but i have scoured the
> docs and cant find it.
> 
> Any ideas, anyone?
> 
> Thanks
> 
> graeme
> 
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