[SOLVED] How do I mock or override Kernel.system?

How would be the correct way to mock or override the Kernel.system method so that when called with:

system("some command")

instead of executing the command, it executes some predefined code?

I tried adding the following to my Test class:

module Kernel
    def system
        puts "SYSTEM CALL!!"
    end
end

But it did not work as expected, instead, the system call was run when executing a test.

If you are talking about unit tests and use Rspec, you should be able to do it like this:

Kernel.should_receive(:system)

or a little more loose:

Kernel.stub(:system)