You might ponder as to why test a link, or even include it as a test case when there are several other major functionalities to be tested in a Drupal website. Every site, be it Drupal or non-Drupal, contains numerous links, some of which lead to external sites and some that whirl within the site. The 'web' works extensively through links, and it is through links that sites are navigated to and get found. Links are also the underlying indicators for security of a site. So links should be paid attention to and be tested thoroughly. Here are some test cases to help you get started: