automake-1.16: Testsuite progress output

 
 15.3.3.3 Testsuite progress output
 ..................................
 
 A custom test driver also has the task of displaying, on the standard
 output, the test results as soon as they become available.  Depending on
 the protocol in use, it can also display the reasons for failures and
 skips, and, more generally, any useful diagnostic output (but remember
 that each line on the screen is precious, so that cluttering the screen
 with overly verbose information is bad idea).  The exact format of this
 progress output is left up to the test driver; in fact, a custom test
 driver might _theoretically_ even decide not to do any such report,
 leaving it all to the testsuite summary (that would be a very lousy
 idea, of course, and serves only to illustrate the flexibility that is
 granted here).
 
    Remember that consistency is good; so, if possible, try to be
 consistent with the output of the built-in Automake test drivers,
 providing a similar “look & feel”.  In particular, the testsuite
 progress output should be colorized when the ‘--color-tests’ is passed
 to the driver.  On the other end, if you are using a known and
 widespread test protocol with well-established implementations, being
 consistent with those implementations’ output might be a good idea too.