Do slimerjs or phantomjs tests through a proxy?

Question

JavaScript

Good day to all.
I have been suffering with tests for a long time, help who knows: I
wrote a small test on slimerjs that enters the page and does its own tasks, but there was a problem using proxies and they can only be used when you run the test itself, that is, through the command line, like this, slimerjs.bat -proxy localhost myscript.jsand here the problem arose how can, for example, the name of a file with a proxy run a test automatically through a random proxy, because if you manually specify each time each time, then this is some kind of horror, there would be no problem if you could set a proxy in the script itself, but you can’t do this in phantomjs a similar situation, maybe someone knows analogues of these tools without this problem.