Fix warning - undefined property behat_prefix

[AnupamaSarjoshi]

Hi Richard,

We see some of the warnings with PHP8.2
Coderunner version 2024031500
release '5.3.1'.

Noticed the below warnings when we edit the Coderuner questions:

Warning: Undefined property: stdClass::$behat_prefix in /var/www/html/moodle/question/type/coderunner/classes/sandbox.php on line 39
Warning: Undefined property: stdClass::$behat_prefix in /var/www/html/moodle/question/type/coderunner/edit_coderunner_form.php on line 253

Could you please review the fix and suggest if it looks good?

Thanks,
Anupama

[trampgeek]

Many thanks Anupama. I had my own fixes in the pipeline but I prefer yours. Though I will shortly do another push to remove the hack to sandbox.php that forces the loading of the test config when testing. I'm following Tim's proposal and have updated all behat features to explicitly require the test sandbox config, though I do think it's clumsy to have to do that for all tests. It's pretty much like having to start all behat code with a function like "if we're running behat ... :" !