[Solved] If a game automatically downloads addon content it doesn’t already have when joining a server, how can I test this without a second computer?

flarn2006 Asks: If a game automatically downloads addon content it doesn’t already have when joining a server, how can I test this without a second computer?
What I want to do is host a local test server that has the file, and connect to it from a local client which doesn’t have the file. The only issue is that both the server and the client will look for the file in the same place. So if the server has it, the client will as well. This means if I try to test the download process, it won’t actually happen because the client already has the file.

I know I can test this by using two separate computers, but is there any good way to set this up locally without changing the code? Can I make a file visible to one process but not another?

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