Since test suites take long time to pass, it would be nice to have 
an ability to monitor test suite execution while it's working. It 
happens pretty often when a person executing tests is not sure 
that environment has complitely been set. Indeed, noone could be 
sure completely while tests have not shown appropriate results. 
So, the simpliest way to check the environment is to execute test 
suite. But then, user needs to be able to see what's going on.

That's true both for test suite and test. During test execution, 
user needs to see some kind of very simple document describing the 
state of test process as well as he needs to see output of each 
test he needs to see, including the one which is currently working.