1 # -*- Mode: cperl; cperl-indent-level: 4 -*-
2 # $Id: Harness.pm,v 1.11 2001/05/23 18:24:41 schwern Exp $
12 use vars qw($VERSION $Verbose $Switches $Have_Devel_Corestack $Curtest
13 $Columns $verbose $switches
14 @ISA @EXPORT @EXPORT_OK
17 # Backwards compatibility for exportable variable names.
19 *switches = \$Switches;
21 $Have_Devel_Corestack = 0;
25 $ENV{HARNESS_ACTIVE} = 1;
27 # Some experimental versions of OS/2 build have broken $?
28 my $Ignore_Exitcode = $ENV{HARNESS_IGNORE_EXITCODE};
30 my $Files_In_Dir = $ENV{HARNESS_FILELEAK_IN_DIR};
34 @EXPORT = qw(&runtests);
35 @EXPORT_OK = qw($verbose $switches);
39 $Columns = $ENV{HARNESS_COLUMNS} || $ENV{COLUMNS} || 80;
40 $Columns--; # Some shells have trouble with a full line of text.
45 Test::Harness - run perl standard test scripts with statistics
51 runtests(@test_files);
55 B<STOP!> If all you want to do is write a test script, consider using
56 Test::Simple. Otherwise, read on.
58 (By using the Test module, you can write test scripts without
59 knowing the exact output this module expects. However, if you need to
60 know the specifics, read on!)
62 Perl test scripts print to standard output C<"ok N"> for each single
63 test, where C<N> is an increasing sequence of integers. The first line
64 output by a standard test script is C<"1..M"> with C<M> being the
65 number of tests that should be run within the test
66 script. Test::Harness::runtests(@tests) runs all the testscripts
67 named as arguments and checks standard output for the expected
70 After all tests have been performed, runtests() prints some
71 performance statistics that are computed by the Benchmark module.
73 =head2 The test script output
75 The following explains how Test::Harness interprets the output of your
82 This header tells how many tests there will be. It should be the
83 first line output by your test program (but its okay if its preceded
86 In certain instanced, you may not know how many tests you will
87 ultimately be running. In this case, it is permitted (but not
88 encouraged) for the 1..M header to appear as the B<last> line output
89 by your test (again, it can be followed by further comments). But we
90 strongly encourage you to put it first.
92 Under B<no> circumstances should 1..M appear in the middle of your
93 output or more than once.
96 =item B<'ok', 'not ok'. Ok?>
98 Any output from the testscript to standard error is ignored and
99 bypassed, thus will be seen by the user. Lines written to standard
100 output containing C</^(not\s+)?ok\b/> are interpreted as feedback for
101 runtests(). All other lines are discarded.
103 C</^not ok/> indicates a failed test. C</^ok/> is a successful test.
106 =item B<test numbers>
108 Perl normally expects the 'ok' or 'not ok' to be followed by a test
109 number. It is tolerated if the test numbers after 'ok' are
110 omitted. In this case Test::Harness maintains temporarily its own
111 counter until the script supplies test numbers again. So the following
126 Failed 3/6 tests, 50.00% okay
129 =item B<$Test::Harness::verbose>
131 The global variable $Test::Harness::verbose is exportable and can be
132 used to let runtests() display the standard output of the script
133 without altering the behavior otherwise.
135 =item B<$Test::Harness::switches>
137 The global variable $Test::Harness::switches is exportable and can be
138 used to set perl command line options used for running the test
139 script(s). The default value is C<-w>.
141 =item B<Skipping tests>
143 If the standard output line contains the substring C< # Skip> (with
144 variations in spacing and case) after C<ok> or C<ok NUMBER>, it is
145 counted as a skipped test. If the whole testscript succeeds, the
146 count of skipped tests is included in the generated output.
147 C<Test::Harness> reports the text after C< # Skip\S*\s+> as a reason
150 ok 23 # skip Insufficient flogiston pressure.
152 Similarly, one can include a similar explanation in a C<1..0> line
153 emitted if the test script is skipped completely:
155 1..0 # Skipped: no leverage found
159 If the standard output line contains the substring C< # TODO> after
160 C<not ok> or C<not ok NUMBER>, it is counted as a todo test. The text
161 afterwards is the thing that has to be done before this test will
164 not ok 13 # TODO harness the power of the atom
166 These tests represent a feature to be implemented or a bug to be fixed
167 and act as something of an executable "thing to do" list. They are
168 B<not> expected to succeed. Should a todo test begin succeeding,
169 Test::Harness will report it as a bonus. This indicates that whatever
170 you were supposed to do has been done and you should promote this to a
175 As an emergency measure, a test script can decide that further tests
176 are useless (e.g. missing dependencies) and testing should stop
177 immediately. In that case the test script prints the magic words
181 to standard output. Any message after these words will be displayed by
182 C<Test::Harness> as the reason why testing is stopped.
186 Additional comments may be put into the testing output on their own
187 lines. Comment lines should begin with a '#', Test::Harness will
191 # Life is good, the sun is shining, RAM is cheap.
193 # got 'Bush' expected 'Gore'
195 =item B<Anything else>
197 Any other output Test::Harness sees it will silently ignore B<BUT WE
198 PLAN TO CHANGE THIS!> If you wish to place additional output in your
199 test script, please use a comment.
206 It will happen, your tests will fail. After you mop up your ego, you
207 can begin examining the summary report:
209 t/base..............ok
210 t/nonumbers.........ok
211 t/ok................ok
212 t/test-harness......ok
213 t/waterloo..........dubious
214 Test returned status 3 (wstat 768, 0x300)
215 DIED. FAILED tests 1, 3, 5, 7, 9, 11, 13, 15, 17, 19
216 Failed 10/20 tests, 50.00% okay
217 Failed Test Stat Wstat Total Fail Failed List of Failed
218 -----------------------------------------------------------------------
219 t/waterloo.t 3 768 20 10 50.00% 1 3 5 7 9 11 13 15 17 19
220 Failed 1/5 test scripts, 80.00% okay. 10/44 subtests failed, 77.27% okay.
222 Everything passed but t/waterloo.t. It failed 10 of 20 tests and
223 exited with non-zero status indicating something dubious happened.
225 The columns in the summary report mean:
231 The test file which failed.
235 If the test exited with non-zero, this is its exit status.
239 The wait status of the test I<umm, I need a better explanation here>.
243 Total number of tests expected to run.
247 Number which failed, either from "not ok" or because they never ran.
251 Percentage of the total tests which failed.
253 =item B<List of Failed>
255 A list of the tests which failed. Successive failures may be
256 abbreviated (ie. 15-20 to indicate that tests 15, 16, 17, 18, 19 and
264 Test::Harness currently only has one function, here it is.
270 my $allok = runtests(@test_files);
272 This runs all the given @test_files and divines whether they passed
273 or failed based on their output to STDOUT (details above). It prints
274 out each individual test which failed along with a summary report and
275 a how long it all took.
277 It returns true if everything was ok, false otherwise.
280 This is just _run_all_tests() plus _show_results()
289 my($tot, $failedtests) = _run_all_tests(@tests);
290 _show_results($tot, $failedtests);
292 my $ok = ($tot->{bad} == 0 && $tot->{max});
294 die q{Assert '$ok xor keys %$failedtests' failed!}
295 unless $ok xor keys %$failedtests;
304 my @files = _globdir $dir;
306 Returns all the files in a directory. This is shorthand for backwards
307 compatibility on systems where glob() doesn't work right.
313 my @f = readdir DIRH;
319 =item B<_run_all_tests>
321 my($total, $failed) = _run_all_tests(@test_files);
323 Runs all the given @test_files (as runtests()) but does it quietly (no
324 report). $total is a hash ref summary of all the tests run. Its keys
327 bonus Number of individual todo tests unexpectedly passed
328 max Number of individual tests ran
329 ok Number of individual tests passed
330 sub_skipped Number of individual tests skipped
332 files Number of test files ran
333 good Number of test files passed
334 bad Number of test files failed
335 tests Number of test files originally given
336 skipped Number of test files skipped
338 If $total->{bad} == 0 and $total->{max} > 0, you've got a successful
341 $failed is a hash ref of all the test scripts which failed. Each key
342 is the name of a test script, each value is another hash representing
343 how that script failed. Its keys are these:
345 name Name of the test which failed
346 estat Script's exit value
347 wstat Script's wait status
348 max Number of individual tests
349 failed Number which failed
350 percent Percentage of tests which failed
351 canon List of tests which failed (as string).
353 Needless to say, $failed should be empty if everything passed.
355 B<NOTE> Currently this function is still noisy. I'm working on it.
372 tests => scalar @tests,
378 # pass -I flags to children
379 my $old5lib = $ENV{PERL5LIB};
381 # VMS has a 255-byte limit on the length of %ENV entries, so
382 # toss the ones that involve perl_root, the install location
386 $new5lib = join($Config{path_sep}, grep {!/perl_root/i;} @INC);
387 $Switches =~ s/-(\S*[A-Z]\S*)/"-$1"/g;
390 $new5lib = join($Config{path_sep}, @INC);
393 local($ENV{'PERL5LIB'}) = $new5lib;
395 my @dir_files = _globdir $Files_In_Dir if defined $Files_In_Dir;
396 my $t_start = new Benchmark;
400 foreach (@tests) { # The same code in t/TEST
401 my $suf = /\.(\w+)$/ ? $1 : '';
403 my $suflen = length $suf;
404 $maxlen = $len if $len > $maxlen;
405 $maxsuflen = $suflen if $suflen > $maxsuflen;
407 # + 3 : we want three dots between the test name and the "ok"
408 my $width = $maxlen + 3 - $maxsuflen;
409 foreach my $tfile (@tests) {
410 my($leader, $ml) = _mk_leader($tfile, $width);
413 my $fh = _open_test($tfile);
415 # state of the current test.
424 skip_reason => undef,
428 my($seen_header, $tests_seen) = (0,0);
430 if( _parse_header($_, \%test, \%tot) ) {
431 warn "Test header seen twice!\n" if $seen_header;
435 warn "1..M can only appear at the beginning or end of tests\n"
436 if $tests_seen && $test{max} < $tests_seen;
438 elsif( _parse_test_line($_, \%test, \%tot) ) {
444 my($estatus, $wstatus) = _close_fh($fh);
446 my $allok = $test{ok} == $test{max} && $test{'next'} == $test{max}+1;
449 $failedtests{$tfile} = _dubious_return(\%test, \%tot,
451 $failedtests{$tfile}{name} = $tfile;
454 if ($test{max} and $test{skipped} + $test{bonus}) {
456 push(@msg, "$test{skipped}/$test{max} skipped: $test{skip_reason}")
458 push(@msg, "$test{bonus}/$test{max} unexpectedly succeeded")
460 print "$test{ml}ok, ".join(', ', @msg)."\n";
461 } elsif ($test{max}) {
462 print "$test{ml}ok\n";
463 } elsif (defined $test{skip_reason}) {
464 print "skipped: $test{skip_reason}\n";
467 print "skipped test on this platform\n";
474 if ($test{'next'} <= $test{max}) {
475 push @{$test{failed}}, $test{'next'}..$test{max};
477 if (@{$test{failed}}) {
478 my ($txt, $canon) = canonfailed($test{max},$test{skipped},
480 print "$test{ml}$txt";
481 $failedtests{$tfile} = { canon => $canon,
483 failed => scalar @{$test{failed}},
485 percent => 100*(scalar @{$test{failed}})/$test{max},
490 print "Don't know which tests failed: got $test{ok} ok, ".
491 "expected $test{max}\n";
492 $failedtests{$tfile} = { canon => '??',
502 } elsif ($test{'next'} == 0) {
503 print "FAILED before any test output arrived\n";
505 $failedtests{$tfile} = { canon => '??',
516 $tot{sub_skipped} += $test{skipped};
518 if (defined $Files_In_Dir) {
519 my @new_dir_files = _globdir $Files_In_Dir;
520 if (@new_dir_files != @dir_files) {
522 @f{@new_dir_files} = (1) x @new_dir_files;
523 delete @f{@dir_files};
524 my @f = sort keys %f;
525 print "LEAKED FILES: @f\n";
526 @dir_files = @new_dir_files;
530 $tot{bench} = timediff(new Benchmark, $t_start);
533 if (defined $old5lib) {
534 $ENV{PERL5LIB} = $old5lib;
536 delete $ENV{PERL5LIB};
540 return(\%tot, \%failedtests);
545 my($leader, $ml) = _mk_leader($test_file, $width);
547 Generates the 't/foo........' $leader for the given $test_file as well
548 as a similar version which will overwrite the current line (by use of
549 \r and such). $ml may be empty if Test::Harness doesn't think you're
550 on TTY. The width is the width of the "yada/blah..." string.
555 my ($te, $width) = @_;
559 if ($^O eq 'VMS') { $te =~ s/^.*\.t\./\[.t./s; }
560 my $blank = (' ' x 77);
561 my $leader = "$te" . '.' x ($width - length($te));
564 $ml = "\r$blank\r$leader"
565 if -t STDOUT and not $ENV{HARNESS_NOTTY} and not $Verbose;
567 return($leader, $ml);
572 my($tot, $failedtests) = @_;
575 my $bonusmsg = _bonusmsg($tot);
577 if ($tot->{bad} == 0 && $tot->{max}) {
578 # print "All tests successful$bonusmsg.\n";
579 print "All tests successful.\n";
580 } elsif ($tot->{tests}==0){
581 die "FAILED--no tests were run for some reason.\n";
582 } elsif ($tot->{max} == 0) {
583 my $blurb = $tot->{tests}==1 ? "script" : "scripts";
584 die "FAILED--$tot->{tests} test $blurb could be run, ".
585 "alas--no output ever seen\n";
587 $pct = sprintf("%.2f", $tot->{good} / $tot->{tests} * 100);
588 my $subpct = sprintf " %d/%d subtests failed, %.2f%% okay.",
589 $tot->{max} - $tot->{ok}, $tot->{max},
590 100*$tot->{ok}/$tot->{max};
592 my($fmt_top, $fmt) = _create_fmts($failedtests);
594 # Now write to formats
595 for my $script (sort keys %$failedtests) {
596 $Curtest = $failedtests->{$script};
600 $bonusmsg =~ s/^,\s*//;
601 print "$bonusmsg.\n" if $bonusmsg;
602 die "Failed $tot->{bad}/$tot->{tests} test scripts, $pct% okay.".
607 printf("Files=%d, Tests=%d, %s\n",
608 $tot->{files}, $tot->{max}, timestr($tot->{bench}, 'nop'));
613 my($line, $test, $tot) = @_;
617 print $line if $Verbose;
620 if ($line =~ /^1\.\.([0-9]+) todo([\d\s]+);?/i) {
622 for (split(/\s+/, $2)) { $test->{todo}{$_} = 1; }
624 $tot->{max} += $test->{max};
630 # 1..0 # skip Why? Because I said so!
631 elsif ($line =~ /^1\.\.([0-9]+)
632 (\s*\#\s*[Ss]kip\S*\s* (.+))?
637 $tot->{max} += $test->{max};
639 $test->{'next'} = 1 unless $test->{'next'};
640 $test->{skip_reason} = $3 if not $test->{max} and defined $3;
655 my $s = _set_switches($test);
657 # XXX This is WAY too core specific!
658 my $cmd = ($ENV{'HARNESS_COMPILE_TEST'})
659 ? "./perl -I../lib ../utils/perlcc $test "
660 . "-r 2>> ./compilelog |"
662 $cmd = "MCR $cmd" if $^O eq 'VMS';
664 if( open(PERL, $cmd) ) {
668 print "can't run $test. $!\n";
680 sub _parse_test_line {
681 my($line, $test, $tot) = @_;
683 if ($line =~ /^(not\s+)?ok\b/i) {
684 my $this = $test->{'next'} || 1;
686 if ($line =~ /^(not )?ok\s*(\d*)(\s*#.*)?/) {
687 my($not, $tnum, $extra) = ($1, $2, $3);
689 $this = $tnum if $tnum;
691 my($type, $reason) = $extra =~ /^\s*#\s*([Ss]kip\S*|TODO)(\s+.+)?/
694 my($istodo, $isskip);
695 if( defined $type ) {
696 $istodo = $type =~ /TODO/;
697 $isskip = $type =~ /skip/i;
700 $test->{todo}{$tnum} = 1 if $istodo;
703 print "$test->{ml}NOK $this" if $test->{ml};
704 if (!$test->{todo}{$this}) {
705 push @{$test->{failed}}, $this;
712 print "$test->{ml}ok $this/$test->{max}" if $test->{ml};
715 $test->{skipped}++ if $isskip;
717 $reason = '[no reason given]'
718 if $isskip and not defined $reason;
719 if (defined $reason and defined $test->{skip_reason}) {
720 # print "was: '$skip_reason' new '$reason'\n";
721 $test->{skip_reason} = 'various reasons'
722 if $test->{skip_reason} ne $reason;
723 } elsif (defined $reason) {
724 $test->{skip_reason} = $reason;
727 $test->{bonus}++, $tot->{bonus}++ if $test->{todo}{$this};
731 elsif ($line =~ /^ok\s*(\d*)\s*\#([^\r]*)$/) { # XXX multiline ok?
732 $this = $1 if $1 > 0;
733 print "$test->{ml}ok $this/$test->{max}" if $test->{ml};
738 # an ok or not ok not matching the 3 cases above...
739 # just ignore it for compatibility with TEST
743 if ($this > $test->{'next'}) {
744 # print "Test output counter mismatch [test $this]\n";
745 # no need to warn probably
746 push @{$test->{failed}}, $test->{'next'}..$this-1;
748 elsif ($this < $test->{'next'}) {
749 #we have seen more "ok" lines than the number suggests
750 print "Confused test output: test $this answered after ".
751 "test ", $test->{'next'}-1, "\n";
752 $test->{'next'} = $this;
754 $test->{'next'} = $this + 1;
757 elsif ($line =~ /^Bail out!\s*(.*)/i) { # magic words
758 die "FAILED--Further testing stopped" .
759 ($1 ? ": $1\n" : ".\n");
768 $bonusmsg = (" ($tot->{bonus} subtest".($tot->{bonus} > 1 ? 's' : '').
769 " UNEXPECTEDLY SUCCEEDED)")
772 if ($tot->{skipped}) {
773 $bonusmsg .= ", $tot->{skipped} test"
774 . ($tot->{skipped} != 1 ? 's' : '');
775 if ($tot->{sub_skipped}) {
776 $bonusmsg .= " and $tot->{sub_skipped} subtest"
777 . ($tot->{sub_skipped} != 1 ? 's' : '');
779 $bonusmsg .= ' skipped';
781 elsif ($tot->{sub_skipped}) {
782 $bonusmsg .= ", $tot->{sub_skipped} subtest"
783 . ($tot->{sub_skipped} != 1 ? 's' : '')
790 # VMS has some subtle nastiness with closing the test files.
794 close($fh); # must close to reap child resource values
796 my $wstatus = $Ignore_Exitcode ? 0 : $?; # Can trust $? ?
798 $estatus = ($^O eq 'VMS'
799 ? eval 'use vmsish "status"; $estatus = $?'
802 return($estatus, $wstatus);
806 # Set up the command-line switches to run perl as.
811 open(TEST, $test) or print "can't open $test. $!\n";
814 $s .= " $ENV{'HARNESS_PERL_SWITCHES'}"
815 if exists $ENV{'HARNESS_PERL_SWITCHES'};
816 $s .= join " ", q[ "-T"], map {qq["-I$_"]} @INC
817 if $first =~ /^#!.*\bperl.*-\w*T/;
819 close(TEST) or print "can't close $test. $!\n";
825 # Test program go boom.
826 sub _dubious_return {
827 my($test, $tot, $estatus, $wstatus) = @_;
828 my ($failed, $canon, $percent) = ('??', '??');
830 printf "$test->{ml}dubious\n\tTest returned status $estatus ".
831 "(wstat %d, 0x%x)\n",
833 print "\t\t(VMS status is $estatus)\n" if $^O eq 'VMS';
835 if (corestatus($wstatus)) { # until we have a wait module
836 if ($Have_Devel_Corestack) {
837 Devel::CoreStack::stack($^X);
839 print "\ttest program seems to have generated a core\n";
846 if ($test->{'next'} == $test->{max} + 1 and not @{$test->{failed}}) {
847 print "\tafter all the subtests completed successfully\n";
849 $failed = 0; # But we do not set $canon!
852 push @{$test->{failed}}, $test->{'next'}..$test->{max};
853 $failed = @{$test->{failed}};
854 (my $txt, $canon) = canonfailed($test->{max},$test->{skipped},@{$test->{failed}});
855 $percent = 100*(scalar @{$test->{failed}})/$test->{max};
860 return { canon => $canon, max => $test->{max} || '??',
863 estat => $estatus, wstat => $wstatus,
868 sub _garbled_output {
869 my($gibberish) = shift;
870 warn "Confusing test output: '$gibberish'\n";
875 my($failedtests) = @_;
877 my $failed_str = "Failed Test";
878 my $middle_str = " Stat Wstat Total Fail Failed ";
879 my $list_str = "List of Failed";
881 # Figure out our longest name string for formatting purposes.
882 my $max_namelen = length($failed_str);
883 foreach my $script (keys %$failedtests) {
884 my $namelen = length $failedtests->{$script}->{name};
885 $max_namelen = $namelen if $namelen > $max_namelen;
888 my $list_len = $Columns - length($middle_str) - $max_namelen;
889 if ($list_len < length($list_str)) {
890 $list_len = length($list_str);
891 $max_namelen = $Columns - length($middle_str) - $list_len;
892 if ($max_namelen < length($failed_str)) {
893 $max_namelen = length($failed_str);
894 $Columns = $max_namelen + length($middle_str) + $list_len;
898 my $fmt_top = "format STDOUT_TOP =\n"
899 . sprintf("%-${max_namelen}s", $failed_str)
905 my $fmt = "format STDOUT =\n"
906 . "@" . "<" x ($max_namelen - 1)
907 . " @>> @>>>> @>>>> @>>> ^##.##% "
908 . "^" . "<" x ($list_len - 1) . "\n"
909 . '{ $Curtest->{name}, $Curtest->{estat},'
910 . ' $Curtest->{wstat}, $Curtest->{max},'
911 . ' $Curtest->{failed}, $Curtest->{percent},'
912 . ' $Curtest->{canon}'
914 . "~~" . " " x ($Columns - $list_len - 2) . "^"
915 . "<" x ($list_len - 1) . "\n"
916 . '$Curtest->{canon}'
924 return($fmt_top, $fmt);
928 my $tried_devel_corestack;
933 eval {require 'wait.ph'};
934 my $ret = defined &WCOREDUMP ? WCOREDUMP($st) : $st & 0200;
936 eval { require Devel::CoreStack; $Have_Devel_Corestack++ }
937 unless $tried_devel_corestack++;
943 sub canonfailed ($@) {
944 my($max,$skipped,@failed) = @_;
946 @failed = sort {$a <=> $b} grep !$seen{$_}++, @failed;
947 my $failed = @failed;
951 my $last = $min = shift @failed;
954 for (@failed, $failed[-1]) { # don't forget the last one
955 if ($_ > $last+1 || $_ == $last) {
959 push @canon, "$min-$last";
966 push @result, "FAILED tests @canon\n";
967 $canon = join ' ', @canon;
969 push @result, "FAILED test $last\n";
973 push @result, "\tFailed $failed/$max tests, ";
974 push @result, sprintf("%.2f",100*(1-$failed/$max)), "% okay";
975 my $ender = 's' x ($skipped > 1);
976 my $good = $max - $failed - $skipped;
977 my $goodper = sprintf("%.2f",100*($good/$max));
978 push @result, " (-$skipped skipped test$ender: $good okay, ".
982 my $txt = join "", @result;
999 C<&runtests> is exported by Test::Harness per default.
1001 C<$verbose> and C<$switches> are exported upon request.
1008 =item C<All tests successful.\nFiles=%d, Tests=%d, %s>
1010 If all tests are successful some statistics about the performance are
1013 =item C<FAILED tests %s\n\tFailed %d/%d tests, %.2f%% okay.>
1015 For any single script that has failing subtests statistics like the
1018 =item C<Test returned status %d (wstat %d)>
1020 Scripts that return a non-zero exit status, both C<$? E<gt>E<gt> 8>
1021 and C<$?> are printed in a message similar to the above.
1023 =item C<Failed 1 test, %.2f%% okay. %s>
1025 =item C<Failed %d/%d tests, %.2f%% okay. %s>
1027 If not all tests were successful, the script dies with one of the
1030 =item C<FAILED--Further testing stopped%s>
1032 If a single subtest decides that further testing will not make sense,
1033 the script dies with this message.
1041 =item C<HARNESS_IGNORE_EXITCODE>
1043 Makes harness ignore the exit status of child processes when defined.
1045 =item C<HARNESS_NOTTY>
1047 When set to a true value, forces it to behave as though STDOUT were
1048 not a console. You may need to set this if you don't want harness to
1049 output more frequent progress messages using carriage returns. Some
1050 consoles may not handle carriage returns properly (which results in a
1051 somewhat messy output).
1053 =item C<HARNESS_COMPILE_TEST>
1055 When true it will make harness attempt to compile the test using
1056 C<perlcc> before running it.
1058 B<NOTE> This currently only works when sitting in the perl source
1061 =item C<HARNESS_FILELEAK_IN_DIR>
1063 When set to the name of a directory, harness will check after each
1064 test whether new files appeared in that directory, and report them as
1066 LEAKED FILES: scr.tmp 0 my.db
1068 If relative, directory name is with respect to the current directory at
1069 the moment runtests() was called. Putting absolute path into
1070 C<HARNESS_FILELEAK_IN_DIR> may give more predicatable results.
1072 =item C<HARNESS_PERL_SWITCHES>
1074 Its value will be prepended to the switches used to invoke perl on
1075 each test. For example, setting C<HARNESS_PERL_SWITCHES> to C<-W> will
1076 run all tests with all warnings enabled.
1078 =item C<HARNESS_COLUMNS>
1080 This value will be used for the width of the terminal. If it is not
1081 set then it will default to C<COLUMNS>. If this is not set, it will
1082 default to 80. Note that users of Bourne-sh based shells will need to
1083 C<export COLUMNS> for this module to use that variable.
1085 =item C<HARNESS_ACTIVE>
1087 Harness sets this before executing the individual tests. This allows
1088 the tests to determine if they are being executed through the harness
1089 or by any other means.
1095 Here's how Test::Harness tests itself
1097 $ cd ~/src/devel/Test-Harness
1098 $ perl -Mblib -e 'use Test::Harness qw(&runtests $verbose);
1099 $verbose=0; runtests @ARGV;' t/*.t
1100 Using /home/schwern/src/devel/Test-Harness/blib
1101 t/base..............ok
1102 t/nonumbers.........ok
1103 t/ok................ok
1104 t/test-harness......ok
1105 All tests successful.
1106 Files=4, Tests=24, 2 wallclock secs ( 0.61 cusr + 0.41 csys = 1.02 CPU)
1110 L<Test> and L<Test::Simple> for writing test scripts, L<Benchmark> for
1111 the underlying timing routines, L<Devel::CoreStack> to generate core
1112 dumps from failed tests and L<Devel::Cover> for test coverage
1117 Either Tim Bunce or Andreas Koenig, we don't know. What we know for
1118 sure is, that it was inspired by Larry Wall's TEST script that came
1119 with perl distributions for ages. Numerous anonymous contributors
1120 exist. Andreas Koenig held the torch for many years.
1122 Current maintainer is Michael G Schwern E<lt>schwern@pobox.comE<gt>
1126 Provide a way of running tests quietly (ie. no printing) for automated
1127 validation of tests. This will probably take the form of a version
1128 of runtests() which rather than printing its output returns raw data
1129 on the state of the tests.
1131 Fix HARNESS_COMPILE_TEST without breaking its core usage.
1133 Figure a way to report test names in the failure summary.
1135 Rework the test summary so long test names are not truncated as badly.
1137 Merge back into bleadperl.
1139 Deal with VMS's "not \nok 4\n" mistake.
1141 Add option for coverage analysis.
1144 Keeping whittling away at _run_all_tests()
1147 Clean up how the summary is printed. Get rid of those damned formats.
1151 Test::Harness uses $^X to determine the perl binary to run the tests
1152 with. Test scripts running via the shebang (C<#!>) line may not be
1153 portable because $^X is not consistent for shebang scripts across
1154 platforms. This is no problem when Test::Harness is run with an
1155 absolute path to the perl binary or when $^X can be found in the path.
1157 HARNESS_COMPILE_TEST currently assumes its run from the Perl source