React testing library/jest - How to write unit test for switch statement

I have a simple switch statement below and would like to write a unit test for it using React testing library and jest. The expression in the switch which is country is coming into the component as a prop. I've looked through other posts on here and even though I have found posts related to the testing switch cases, I haven't found anything that has been helpful for my situation. Any help would be greatly appreciated! Thanks guys and Happy New Years!

const mileageLabel = (country) => {
    switch (country) {
      case 'USA':
        return 'Miles';
      case 'CAN':
        return 'Kilometers';
        return 'Miles';