Adding styles to the component

Finally, you can add the following <style> block to the Birthday.svelte file, which completes the Birthday component and means you’ll be ready to display it on a page, which you’ll do in the next chapter:

<script>
  export let name;
  export let dob;
</script>
<span><strong>{name}</strong></span>
<span>{dob}</span>
<style>
  span {
    display: inline-block;
    width: 100px;
  }
</style>

You can avoid writing unit tests for CSS since that is static information. Unit tests are specifically about behavior: what happens when this thing or that thing changes, or a different name prop is passed in?