Test for stop and restart

systemd_service_test.rb

context "Restart a service on the installation system" do
      it "restarts a service with a specialized inst-sys helper if available" do
        File.stub(:exist?).with('/bin/service_start').and_return(true)
        service = SystemdService.find("sshd")
        SCR.stub(:Execute).and_return({'stderr'=>'', 'stdout'=>'', 'exit'=>0})
        expect(service).not_to receive(:command) # SystemdUnit#command
 	expect(service).to receive(:stop)
	expect(service).to recieve(:start)
        expect(service.restart).to be_true
      end

	it "stops a service with a specialized inst-sys helper" do
	  File.stub(:exist?).with('/bin/service_start').and_return(true)
	  service = SystemdService.find("sshd")
          SCR.stub(:Execute).and_return({'stderr'=>'', 'stdout'=>'', 'exit'=>0})
	  expect(service).not_to receive(:command) # SystemdUnit#command
          expect(service.stop).to be_true
  	end
end