Re: Converting DejaGNU tests to Paul's test/assert infrastructure

[Paul Kienzle]

On Oct 24, 2005, at 9:20 AM, David Bateman wrote:

> However, nested functions are not permitted with Paul's test 
> infrastructure. I haven't looked at test.m yet to see, but how 
> complicated would it be to include nested functions in test.m?

You should now be able to build test function blocks with the function 
name being the name of a shared variable which will last until the end 
of the test or until the next 'shared' block.

> Another issue I have is that although "%!error" exists there is no 
> equivalent "%!warning" for the warning conditions. Again how 
> complicated would it be to add this?

Octave can only test the first warning since lastwarn isn't updated 
after the first warning. Presumably it resets itself after returning to 
the prompt.  Also the warnings will be displayed during the test.

Regardless, I've added a warning block similar to the error block:

    %!warning warning("message text")

If you want to check the contents of the warning or error message, then 
use the new syntax '%!error <pattern> code'.  For example:

    %!error <nonconformant> [1,2,3]*[4,5,6]
    %!warning <division by zero> 5/0

Pattern can be any regular expression on the string with leading 
'error: ' and trailing '\n' stripped off.

I first extended the 'fail' command to allow 
fail(code,'warning',pattern) which will check the value of lastwarn 
against the pattern, but I decided the tests looked too ugly.

- Paul