# This control would only appear if it were accidentally included control 'red-dye' do # In rural areas where diesel fuel is sold for # agricultrual purposes and is exempt from taxation (as part # of farm subsidies), tractor diesel fuel is dyed red. Highway # patrol officers check for red dye in the fuel when they # stop grain hauling trucks, as it is a form of tax fraud. describe 'truck fuel color' do it { should cmp 'clear' } end end