Test::Harness - run perl standard test scripts with
       statistics

SYNOPSIS

       use Test::Harness;

       runtests(@tests);

DESCRIPTION

       Perl test scripts print to standard output "ok N" for each
       single test, where N is an increasing sequence of
       integers. The first line output by a standard test script
       is "1..M" with M being the number of tests that should be
       run within the test script.
       Test::Harness::runtests(@tests) runs all the testscripts
       named as arguments and checks standard output for the
       expected "ok N" strings.

       After all tests have been performed, runtests() prints
       some performance statistics that are computed by the
       Benchmark module.

       The test script output

       Any output from the testscript to standard error is
       ignored and bypassed, thus will be seen by the user. Lines
       written to standard output containing /^(not\s+)?ok\b/ are
       interpreted as feedback for runtests().  All other lines
       are discarded.

       It is tolerated if the test numbers after ok are omitted.
       In this case Test::Harness maintains temporarily its own
       counter until the script supplies test numbers again. So
       the following test script

           print <<END;
           1..6
           not ok
           ok
           not ok
           ok
           ok
           END

       will generate

           FAILED tests 1, 3, 6
           Failed 3/6 tests, 50.00% okay

       The global variable $Test::Harness::verbose is exportable
       and can be used to let runtests() display the standard
       output of the script without altering the behavior
       and can be used to set perl command line options used for
       running the test script(s). The default value is -w.

EXPORT

       &runtests is exported by Test::Harness per default.

DIAGNOSTICS

       All tests successful.\nFiles=%d,  Tests=%d, %s
           If all tests are successful some statistics about the
           performance are printed.

       FAILED tests %s\n\tFailed %d/%d tests, %.2f%% okay.
           For any single script that has failing subtests
           statistics like the above are printed.

       Test returned status %d (wstat %d)
           Scripts that return a non-zero exit status, both $? >>
           8 and $? are printed in a message similar to the
           above.

       Failed 1 test, %.2f%% okay. %s

       Failed %d/%d tests, %.2f%% okay. %s
           If not all tests were successful, the script dies with
           one of the above messages.

SEE ALSO

       See the Benchmark manpage for the underlying timing
       routines.

AUTHORS

       Either Tim Bunce or Andreas Koenig, we don't know. What we
       know for sure is, that it was inspired by Larry Wall's
       TEST script that came with perl distributions for ages.
       Numerous anonymous contributors exist. Current maintainer
       is Andreas Koenig.

BUGS

       Test::Harness uses $^X to determine the perl binary to run
       the tests with. Test scripts running via the shebang (#!)
       line may not be portable because $^X is not consistent for
       shebang scripts across platforms. This is no problem when
       Test::Harness is run with an absolute path to the perl
       binary or when $^X can be found in the path.