what is headless mode testing mean
Headless Testing is a concept where we are ignoring those âdrawâ operations and the headless engines just run the same tests in the background [exactly doing the same operations of click, set etc ] what we do on the browser. On a CI server, we might NOT always have a display output installed. 2  Generally X-server is NOT installed on *nix systems that act as CI servers in enterprise settings. 3  However if you are using Windows, it may be though.