[Simpletest-support] Mocks: How to use regular expressions to test the arguments with expectOnce()

[Kyohere L. <pr...@gm...>]

I would like to use expectOnce(...) but one of the arguments will be a long
string, which will include an Error Code that I would like to test for.

e.g. if the function call I want to set for would be something like

$form->addElement('html', '<font color="red"><b>ERROR CODE: ERROR
MESSAGE</b></font>');

where ERROR CODE is set by the calling function.

How do I test that ERROR CODE is equal to 123, for example. I've already
created a Mock of the $form object, and want to do something like

$form->expectOnce('addElement', array('html', '*ERROR 123*');

How would I do this?

Thanks.

Luke