Link is a very important feature of web applications, primarily for switching to jump between pages, to guide the user does not know some of the major means of page addresses.
Link testing is generally concerned about three things:
whether (1) in accordance with established links indicate that, indeed link to the link interface
(2) to test whether the links of the linked pages really exist
page (3) to ensure the system does not exist alone ( That is no link to the only correct URL address to access.)
Tools can refer to the blog post here: