You can use the load helper to source the file which contains the function and then you can call it with the run helper like a normal command. Or alternatively you can source all your functions inside a bootstrap script before testing begins
Be aware though, any code not inside a function will still execute when the file is sourced, so that will only work if you define your functions in a separate file from any executing code
these are a set of editor commands, so I'd like to go from a given text in the editor, and cursor is at a given position, running a command to a new text and cursor position
not sure how to query zle for that, so I was hoping somebody had already made a function for that (:
@antifuchs: it should be easier now with the new (undocumented yet) helper
evl – basically an eval. However, you would also probably need to use zsh/zpty module