Our indicator looks like this: an icon + a label.
The browser has an indicator for when a user is in private mode. The indicator lives in two places under different instances:
The first instance is when the user is in "Horizontal Tabs" when the browser tabs are in the TabsToolbar (tab-bar or toolbar). So, the indicator shows both the icon and it's label.
The second instance is when the user has "Vertical Tabs" turned on. So, the indicator moves or shows up in the Navbar (which contains extensions, address bar) and this time only the icon shows up, no label.
Our task is to write a unit test to confirm that the icon shows up in both instance.
