Output string
	// ReturnCode is the exit code for the command. Setting this to non-zero will
	// cause the command to return an error with this exit code set.
	ReturnCode int
}

// ScriptCommands configures fe, the FakeExec, to have a pre-configured list of
// commands to expect. Calling more commands using fe than those scripted will
// result in a panic. By default, the fe does not enforce command argument checking