# -*- Mode: cperl; cperl-indent-level: 4 -*- # $Id: Harness.pm,v 1.80 2003/12/31 02:39:21 andy Exp $ package Test::Harness; require 5.004; use Test::Harness::Straps; use Test::Harness::Assert; use Exporter; use Benchmark; use Config; use strict; use vars qw( $VERSION @ISA @EXPORT @EXPORT_OK $Verbose $Switches $Debug $verbose $switches $debug $Have_Devel_Corestack $Curtest $Columns $ML $Last_ML_Print $Strap ); =head1 NAME Test::Harness - Run Perl standard test scripts with statistics =head1 VERSION Version 2.40 $Header: /home/cvs/test-harness/lib/Test/Harness.pm,v 1.80 2003/12/31 02:39:21 andy Exp $ =cut $VERSION = '2.40'; # Backwards compatibility for exportable variable names. *verbose = *Verbose; *switches = *Switches; *debug = *Debug; $Have_Devel_Corestack = 0; $ENV{HARNESS_ACTIVE} = 1; END { # For VMS. delete $ENV{HARNESS_ACTIVE}; } # Some experimental versions of OS/2 build have broken $? my $Ignore_Exitcode = $ENV{HARNESS_IGNORE_EXITCODE}; my $Files_In_Dir = $ENV{HARNESS_FILELEAK_IN_DIR}; my $Ok_Slow = $ENV{HARNESS_OK_SLOW}; $Strap = Test::Harness::Straps->new; @ISA = ('Exporter'); @EXPORT = qw(&runtests); @EXPORT_OK = qw($verbose $switches); $Verbose = $ENV{HARNESS_VERBOSE} || 0; $Debug = $ENV{HARNESS_DEBUG} || 0; $Switches = "-w"; $Columns = $ENV{HARNESS_COLUMNS} || $ENV{COLUMNS} || 80; $Columns--; # Some shells have trouble with a full line of text. =head1 SYNOPSIS use Test::Harness; runtests(@test_files); =head1 DESCRIPTION B<STOP!> If all you want to do is write a test script, consider using Test::Simple. Otherwise, read on. (By using the Test module, you can write test scripts without knowing the exact output this module expects. However, if you need to know the specifics, read on!) Perl test scripts print to standard output C<"ok N"> for each single test, where C<N> is an increasing sequence of integers. The first line output by a standard test script is C<"1..M"> with C<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 C<"ok N"> strings. After all tests have been performed, runtests() prints some performance statistics that are computed by the Benchmark module. =head2 The test script output The following explains how Test::Harness interprets the output of your test program. =over 4 =item B<'1..M'> This header tells how many tests there will be. For example, C<1..10> means you plan on running 10 tests. This is a safeguard in case your test dies quietly in the middle of its run. It should be the first non-comment line output by your test program. In certain instances, you may not know how many tests you will ultimately be running. In this case, it is permitted for the 1..M header to appear as the B<last> line output by your test (again, it can be followed by further comments). Under B<no> circumstances should 1..M appear in the middle of your output or more than once. =item B<'ok', 'not ok'. Ok?> 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 C</^(not\s+)?ok\b/> are interpreted as feedback for runtests(). All other lines are discarded. C</^not ok/> indicates a failed test. C</^ok/> is a successful test. =item B<test numbers> Perl normally expects the 'ok' or 'not ok' to be followed by a test number. 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 =item B<test names> Anything after the test number but before the # is considered to be the name of the test. ok 42 this is the name of the test Currently, Test::Harness does nothing with this information. =item B<Skipping tests> If the standard output line contains the substring C< # Skip> (with variations in spacing and case) after C<ok> or C<ok NUMBER>, it is counted as a skipped test. If the whole testscript succeeds, the count of skipped tests is included in the generated output. C<Test::Harness> reports the text after C< # Skip\S*\s+> as a reason for skipping. ok 23 # skip Insufficient flogiston pressure. Similarly, one can include a similar explanation in a C<1..0> line emitted if the test script is skipped completely: 1..0 # Skipped: no leverage found =item B<Todo tests> If the standard output line contains the substring C< # TODO > after C<not ok> or C<not ok NUMBER>, it is counted as a todo test. The text afterwards is the thing that has to be done before this test will succeed. not ok 13 # TODO harness the power of the atom Note that the TODO must have a space after it. =begin _deprecated Alternatively, you can specify a list of what tests are todo as part of the test header. 1..23 todo 5 12 23 This only works if the header appears at the beginning of the test. This style is B<deprecated>. =end _deprecated These tests represent a feature to be implemented or a bug to be fixed and act as something of an executable "thing to do" list. They are B<not> expected to succeed. Should a todo test begin succeeding, Test::Harness will report it as a bonus. This indicates that whatever you were supposed to do has been done and you should promote this to a normal test. =item B<Bail out!> As an emergency measure, a test script can decide that further tests are useless (e.g. missing dependencies) and testing should stop immediately. In that case the test script prints the magic words Bail out! to standard output. Any message after these words will be displayed by C<Test::Harness> as the reason why testing is stopped. =item B<Comments> Additional comments may be put into the testing output on their own lines. Comment lines should begin with a '#', Test::Harness will ignore them. ok 1 # Life is good, the sun is shining, RAM is cheap. not ok 2 # got 'Bush' expected 'Gore' =item B<Anything else> Any other output Test::Harness sees it will silently ignore B<BUT WE PLAN TO CHANGE THIS!> If you wish to place additional output in your test script, please use a comment. =back =head2 Taint mode Test::Harness will honor the C<-T> or C<-t> in the #! line on your test files. So if you begin a test with: #!perl -T the test will be run with taint mode on. =head2 Configuration variables. These variables can be used to configure the behavior of Test::Harness. They are exported on request. =over 4 =item B<$Test::Harness::Verbose> The global variable C<$Test::Harness::Verbose> is exportable and can be used to let C<runtests()> display the standard output of the script without altering the behavior otherwise. The F<prove> utility's C<-v> flag will set this. =item B<$Test::Harness::switches> The global variable C<$Test::Harness::switches> is exportable and can be used to set perl command line options used for running the test script(s). The default value is C<-w>. It overrides C<HARNESS_SWITCHES>. =back =head2 Failure It will happen: your tests will fail. After you mop up your ego, you can begin examining the summary report: t/base..............ok t/nonumbers.........ok t/ok................ok t/test-harness......ok t/waterloo..........dubious Test returned status 3 (wstat 768, 0x300) DIED. FAILED tests 1, 3, 5, 7, 9, 11, 13, 15, 17, 19 Failed 10/20 tests, 50.00% okay Failed Test Stat Wstat Total Fail Failed List of Failed ----------------------------------------------------------------------- t/waterloo.t 3 768 20 10 50.00% 1 3 5 7 9 11 13 15 17 19 Failed 1/5 test scripts, 80.00% okay. 10/44 subtests failed, 77.27% okay. Everything passed but t/waterloo.t. It failed 10 of 20 tests and exited with non-zero status indicating something dubious happened. The columns in the summary report mean: =over 4 =item B<Failed Test> The test file which failed. =item B<Stat> If the test exited with non-zero, this is its exit status. =item B<Wstat> The wait status of the test. =item B<Total> Total number of tests expected to run. =item B<Fail> Number which failed, either from "not ok" or because they never ran. =item B<Failed> Percentage of the total tests which failed. =item B<List of Failed> A list of the tests which failed. Successive failures may be abbreviated (ie. 15-20 to indicate that tests 15, 16, 17, 18, 19 and 20 failed). =back =head2 Functions Test::Harness currently only has one function, here it is. =over 4 =item B<runtests> my $allok = runtests(@test_files); This runs all the given @test_files and divines whether they passed or failed based on their output to STDOUT (details above). It prints out each individual test which failed along with a summary report and a how long it all took. It returns true if everything was ok. Otherwise it will die() with one of the messages in the DIAGNOSTICS section. =for _private This is just _run_all_tests() plus _show_results() =cut sub runtests { my(@tests) = @_; local ($\, $,); my($tot, $failedtests) = _run_all_tests(@tests); _show_results($tot, $failedtests); my $ok = _all_ok($tot); assert(($ok xor keys %$failedtests), q{ok status jives with $failedtests}); return $ok; } =begin _private =item B<_all_ok> my $ok = _all_ok(\%tot); Tells you if this test run is overall successful or not. =cut sub _all_ok { my($tot) = shift; return $tot->{bad} == 0 && ($tot->{max} || $tot->{skipped}) ? 1 : 0; } =item B<_globdir> my @files = _globdir $dir; Returns all the files in a directory. This is shorthand for backwards compatibility on systems where glob() doesn't work right. =cut sub _globdir { opendir DIRH, shift; my @f = readdir DIRH; closedir DIRH; return @f; } =item B<_run_all_tests> my($total, $failed) = _run_all_tests(@test_files); Runs all the given C<@test_files> (as C<runtests()>) but does it quietly (no report). $total is a hash ref summary of all the tests run. Its keys and values are this: bonus Number of individual todo tests unexpectedly passed max Number of individual tests ran ok Number of individual tests passed sub_skipped Number of individual tests skipped todo Number of individual todo tests files Number of test files ran good Number of test files passed bad Number of test files failed tests Number of test files originally given skipped Number of test files skipped If C<< $total->{bad} == 0 >> and C<< $total->{max} > 0 >>, you've got a successful test. $failed is a hash ref of all the test scripts which failed. Each key is the name of a test script, each value is another hash representing how that script failed. Its keys are these: name Name of the test which failed estat Script's exit value wstat Script's wait status max Number of individual tests failed Number which failed percent Percentage of tests which failed canon List of tests which failed (as string). C<$failed> should be empty if everything passed. B<NOTE> Currently this function is still noisy. I'm working on it. =cut #'# sub _run_all_tests { my(@tests) = @_; local($|) = 1; my(%failedtests); # Test-wide totals. my(%tot) = ( bonus => 0, max => 0, ok => 0, files => 0, bad => 0, good => 0, tests => scalar @tests, sub_skipped => 0, todo => 0, skipped => 0, bench => 0, ); my @dir_files = _globdir $Files_In_Dir if defined $Files_In_Dir; my $t_start = new Benchmark; my $width = _leader_width(@tests); foreach my $tfile (@tests) { if ( $Test::Harness::Debug ) { print "# Running: ", $Strap->_command_line($tfile), "\n"; } $Last_ML_Print = 0; # so each test prints at least once my($leader, $ml) = _mk_leader($tfile, $width); local $ML = $ml; print $leader; $tot{files}++; $Strap->{_seen_header} = 0; my %results = $Strap->analyze_file($tfile) or do { warn $Strap->{error}, "\n"; next }; # state of the current test. my @failed = grep { !$results{details}[$_-1]{ok} } 1..@{$results{details}}; my %test = ( ok => $results{ok}, 'next' => $Strap->{'next'}, max => $results{max}, failed => \@failed, bonus => $results{bonus}, skipped => $results{skip}, skip_reason => $results{skip_reason}, skip_all => $Strap->{skip_all}, ml => $ml, ); $tot{bonus} += $results{bonus}; $tot{max} += $results{max}; $tot{ok} += $results{ok}; $tot{todo} += $results{todo}; $tot{sub_skipped} += $results{skip}; my($estatus, $wstatus) = @results{qw(exit wait)}; if ($results{passing}) { if ($test{max} and $test{skipped} + $test{bonus}) { my @msg; push(@msg, "$test{skipped}/$test{max} skipped: $test{skip_reason}") if $test{skipped}; push(@msg, "$test{bonus}/$test{max} unexpectedly succeeded") if $test{bonus}; print "$test{ml}ok\n ".join(', ', @msg)."\n"; } elsif ($test{max}) { print "$test{ml}ok\n"; } elsif (defined $test{skip_all} and length $test{skip_all}) { print "skipped\n all skipped: $test{skip_all}\n"; $tot{skipped}++; } else { print "skipped\n all skipped: no reason given\n"; $tot{skipped}++; } $tot{good}++; } else { # List unrun tests as failures. if ($test{'next'} <= $test{max}) { push @{$test{failed}}, $test{'next'}..$test{max}; } # List overruns as failures. else { my $details = $results{details}; foreach my $overrun ($test{max}+1..@$details) { next unless ref $details->[$overrun-1]; push @{$test{failed}}, $overrun } } if ($wstatus) { $failedtests{$tfile} = _dubious_return(\%test, \%tot, $estatus, $wstatus); $failedtests{$tfile}{name} = $tfile; } elsif($results{seen}) { if (@{$test{failed}} and $test{max}) { my ($txt, $canon) = _canonfailed($test{max},$test{skipped}, @{$test{failed}}); print "$test{ml}$txt"; $failedtests{$tfile} = { canon => $canon, max => $test{max}, failed => scalar @{$test{failed}}, name => $tfile, percent => 100*(scalar @{$test{failed}})/$test{max}, estat => '', wstat => '', }; } else { print "Don't know which tests failed: got $test{ok} ok, ". "expected $test{max}\n"; $failedtests{$tfile} = { canon => '??', max => $test{max}, failed => '??', name => $tfile, percent => undef, estat => '', wstat => '', }; } $tot{bad}++; } else { print "FAILED before any test output arrived\n"; $tot{bad}++; $failedtests{$tfile} = { canon => '??', max => '??', failed => '??', name => $tfile, percent => undef, estat => '', wstat => '', }; } } if (defined $Files_In_Dir) { my @new_dir_files = _globdir $Files_In_Dir; if (@new_dir_files != @dir_files) { my %f; @f{@new_dir_files} = (1) x @new_dir_files; delete @f{@dir_files}; my @f = sort keys %f; print "LEAKED FILES: @f\n"; @dir_files = @new_dir_files; } } } $tot{bench} = timediff(new Benchmark, $t_start); $Strap->_restore_PERL5LIB; return(\%tot, \%failedtests); } =item B<_mk_leader> my($leader, $ml) = _mk_leader($test_file, $width); Generates the 't/foo........' $leader for the given C<$test_file> as well as a similar version which will overwrite the current line (by use of \r and such). C<$ml> may be empty if Test::Harness doesn't think you're on TTY. The C<$width> is the width of the "yada/blah.." string. =cut sub _mk_leader { my($te, $width) = @_; chomp($te); $te =~ s/\.\w+$/./; if ($^O eq 'VMS') { $te =~ s/^.*\.t\./\[.t./s; } my $blank = (' ' x 77); my $leader = "$te" . '.' x ($width - length($te)); my $ml = ""; $ml = "\r$blank\r$leader" if -t STDOUT and not $ENV{HARNESS_NOTTY} and not $Verbose; return($leader, $ml); } =item B<_leader_width> my($width) = _leader_width(@test_files); Calculates how wide the leader should be based on the length of the longest test name. =cut sub _leader_width { my $maxlen = 0; my $maxsuflen = 0; foreach (@_) { my $suf = /\.(\w+)$/ ? $1 : ''; my $len = length; my $suflen = length $suf; $maxlen = $len if $len > $maxlen; $maxsuflen = $suflen if $suflen > $maxsuflen; } # + 3 : we want three dots between the test name and the "ok" return $maxlen + 3 - $maxsuflen; } sub _show_results { my($tot, $failedtests) = @_; my $pct; my $bonusmsg = _bonusmsg($tot); if (_all_ok($tot)) { print "All tests successful$bonusmsg.\n"; } elsif (!$tot->{tests}){ die "FAILED--no tests were run for some reason.\n"; } elsif (!$tot->{max}) { my $blurb = $tot->{tests}==1 ? "script" : "scripts"; die "FAILED--$tot->{tests} test $blurb could be run, ". "alas--no output ever seen\n"; } else { $pct = sprintf("%.2f", $tot->{good} / $tot->{tests} * 100); my $percent_ok = 100*$tot->{ok}/$tot->{max}; my $subpct = sprintf " %d/%d subtests failed, %.2f%% okay.", $tot->{max} - $tot->{ok}, $tot->{max}, $percent_ok; my($fmt_top, $fmt) = _create_fmts($failedtests); # Now write to formats for my $script (sort keys %$failedtests) { $Curtest = $failedtests->{$script}; write; } if ($tot->{bad}) { $bonusmsg =~ s/^,\s*//; print "$bonusmsg.\n" if $bonusmsg; die "Failed $tot->{bad}/$tot->{tests} test scripts, $pct% okay.". "$subpct\n"; } } printf("Files=%d, Tests=%d, %s\n", $tot->{files}, $tot->{max}, timestr($tot->{bench}, 'nop')); } my %Handlers = (); $Strap->{callback} = sub { my($self, $line, $type, $totals) = @_; print $line if $Verbose; my $meth = $Handlers{$type}; $meth->($self, $line, $type, $totals) if $meth; }; $Handlers{header} = sub { my($self, $line, $type, $totals) = @_; warn "Test header seen more than once!\n" if $self->{_seen_header}; $self->{_seen_header}++; warn "1..M can only appear at the beginning or end of tests\n" if $totals->{seen} && $totals->{max} < $totals->{seen}; }; $Handlers{test} = sub { my($self, $line, $type, $totals) = @_; my $curr = $totals->{seen}; my $next = $self->{'next'}; my $max = $totals->{max}; my $detail = $totals->{details}[-1]; if( $detail->{ok} ) { _print_ml_less("ok $curr/$max"); if( $detail->{type} eq 'skip' ) { $totals->{skip_reason} = $detail->{reason} unless defined $totals->{skip_reason}; $totals->{skip_reason} = 'various reasons' if $totals->{skip_reason} ne $detail->{reason}; } } else { _print_ml("NOK $curr"); } if( $curr > $next ) { print "Test output counter mismatch [test $curr]\n"; } elsif( $curr < $next ) { print "Confused test output: test $curr answered after ". "test ", $next - 1, "\n"; } }; $Handlers{bailout} = sub { my($self, $line, $type, $totals) = @_; die "FAILED--Further testing stopped" . ($self->{bailout_reason} ? ": $self->{bailout_reason}\n" : ".\n"); }; sub _print_ml { print join '', $ML, @_ if $ML; } # For slow connections, we save lots of bandwidth by printing only once # per second. sub _print_ml_less { if( !$Ok_Slow || $Last_ML_Print != time ) { _print_ml(@_); $Last_ML_Print = time; } } sub _bonusmsg { my($tot) = @_; my $bonusmsg = ''; $bonusmsg = (" ($tot->{bonus} subtest".($tot->{bonus} > 1 ? 's' : ''). " UNEXPECTEDLY SUCCEEDED)") if $tot->{bonus}; if ($tot->{skipped}) { $bonusmsg .= ", $tot->{skipped} test" . ($tot->{skipped} != 1 ? 's' : ''); if ($tot->{sub_skipped}) { $bonusmsg .= " and $tot->{sub_skipped} subtest" . ($tot->{sub_skipped} != 1 ? 's' : ''); } $bonusmsg .= ' skipped'; } elsif ($tot->{sub_skipped}) { $bonusmsg .= ", $tot->{sub_skipped} subtest" . ($tot->{sub_skipped} != 1 ? 's' : '') . " skipped"; } return $bonusmsg; } # Test program go boom. sub _dubious_return { my($test, $tot, $estatus, $wstatus) = @_; my ($failed, $canon, $percent) = ('??', '??'); printf "$test->{ml}dubious\n\tTest returned status $estatus ". "(wstat %d, 0x%x)\n", $wstatus,$wstatus; print "\t\t(VMS status is $estatus)\n" if $^O eq 'VMS'; if (_corestatus($wstatus)) { # until we have a wait module if ($Have_Devel_Corestack) { Devel::CoreStack::stack($^X); } else { print "\ttest program seems to have generated a core\n"; } } $tot->{bad}++; if ($test->{max}) { if ($test->{'next'} == $test->{max} + 1 and not @{$test->{failed}}) { print "\tafter all the subtests completed successfully\n"; $percent = 0; $failed = 0; # But we do not set $canon! } else { push @{$test->{failed}}, $test->{'next'}..$test->{max}; $failed = @{$test->{failed}}; (my $txt, $canon) = _canonfailed($test->{max},$test->{skipped},@{$test->{failed}}); $percent = 100*(scalar @{$test->{failed}})/$test->{max}; print "DIED. ",$txt; } } return { canon => $canon, max => $test->{max} || '??', failed => $failed, percent => $percent, estat => $estatus, wstat => $wstatus, }; } sub _create_fmts { my($failedtests) = @_; my $failed_str = "Failed Test"; my $middle_str = " Stat Wstat Total Fail Failed "; my $list_str = "List of Failed"; # Figure out our longest name string for formatting purposes. my $max_namelen = length($failed_str); foreach my $script (keys %$failedtests) { my $namelen = length $failedtests->{$script}->{name}; $max_namelen = $namelen if $namelen > $max_namelen; } my $list_len = $Columns - length($middle_str) - $max_namelen; if ($list_len < length($list_str)) { $list_len = length($list_str); $max_namelen = $Columns - length($middle_str) - $list_len; if ($max_namelen < length($failed_str)) { $max_namelen = length($failed_str); $Columns = $max_namelen + length($middle_str) + $list_len; } } my $fmt_top = "format STDOUT_TOP =\n" . sprintf("%-${max_namelen}s", $failed_str) . $middle_str . $list_str . "\n" . "-" x $Columns . "\n.\n"; my $fmt = "format STDOUT =\n" . "@" . "<" x ($max_namelen - 1) . " @>> @>>>> @>>>> @>>> ^##.##% " . "^" . "<" x ($list_len - 1) . "\n" . '{ $Curtest->{name}, $Curtest->{estat},' . ' $Curtest->{wstat}, $Curtest->{max},' . ' $Curtest->{failed}, $Curtest->{percent},' . ' $Curtest->{canon}' . "\n}\n" . "~~" . " " x ($Columns - $list_len - 2) . "^" . "<" x ($list_len - 1) . "\n" . '$Curtest->{canon}' . "\n.\n"; eval $fmt_top; die $@ if $@; eval $fmt; die $@ if $@; return($fmt_top, $fmt); } { my $tried_devel_corestack; sub _corestatus { my($st) = @_; my $did_core; eval { # we may not have a WCOREDUMP local $^W = 0; # *.ph files are often *very* noisy require 'wait.ph'; $did_core = WCOREDUMP($st); }; if( $@ ) { $did_core = $st & 0200; } eval { require Devel::CoreStack; $Have_Devel_Corestack++ } unless $tried_devel_corestack++; return $did_core; } } sub _canonfailed ($$@) { my($max,$skipped,@failed) = @_; my %seen; @failed = sort {$a <=> $b} grep !$seen{$_}++, @failed; my $failed = @failed; my @result = (); my @canon = (); my $min; my $last = $min = shift @failed; my $canon; if (@failed) { for (@failed, $failed[-1]) { # don't forget the last one if ($_ > $last+1 || $_ == $last) { if ($min == $last) { push @canon, $last; } else { push @canon, "$min-$last"; } $min = $_; } $last = $_; } local $" = ", "; push @result, "FAILED tests @canon\n"; $canon = join ' ', @canon; } else { push @result, "FAILED test $last\n"; $canon = $last; } push @result, "\tFailed $failed/$max tests, "; if ($max) { push @result, sprintf("%.2f",100*(1-$failed/$max)), "% okay"; } else { push @result, "?% okay"; } my $ender = 's' x ($skipped > 1); my $good = $max - $failed - $skipped; if ($skipped) { my $skipmsg = " (less $skipped skipped test$ender: $good okay, "; if ($max) { my $goodper = sprintf("%.2f",100*($good/$max)); $skipmsg .= "$goodper%)"; } else { $skipmsg .= "?%)"; } push @result, $skipmsg; } push @result, "\n"; my $txt = join "", @result; ($txt, $canon); } =end _private =back =cut 1; __END__ =head1 EXPORT C<&runtests> is exported by Test::Harness by default. C<$verbose>, C<$switches> and C<$debug> are exported upon request. =head1 DIAGNOSTICS =over 4 =item C<All tests successful.\nFiles=%d, Tests=%d, %s> If all tests are successful some statistics about the performance are printed. =item C<FAILED tests %s\n\tFailed %d/%d tests, %.2f%% okay.> For any single script that has failing subtests statistics like the above are printed. =item C<Test returned status %d (wstat %d)> Scripts that return a non-zero exit status, both C<$? E<gt>E<gt> 8> and C<$?> are printed in a message similar to the above. =item C<Failed 1 test, %.2f%% okay. %s> =item C<Failed %d/%d tests, %.2f%% okay. %s> If not all tests were successful, the script dies with one of the above messages. =item C<FAILED--Further testing stopped: %s> If a single subtest decides that further testing will not make sense, the script dies with this message. =back =head1 ENVIRONMENT =over 4 =item C<HARNESS_ACTIVE> Harness sets this before executing the individual tests. This allows the tests to determine if they are being executed through the harness or by any other means. =item C<HARNESS_COLUMNS> This value will be used for the width of the terminal. If it is not set then it will default to C<COLUMNS>. If this is not set, it will default to 80. Note that users of Bourne-sh based shells will need to C<export COLUMNS> for this module to use that variable. =item C<HARNESS_COMPILE_TEST> When true it will make harness attempt to compile the test using C<perlcc> before running it. B<NOTE> This currently only works when sitting in the perl source directory! =item C<HARNESS_DEBUG> If true, Test::Harness will print debugging information about itself as it runs the tests. This is different from C<HARNESS_VERBOSE>, which prints the output from the test being run. Setting C<$Test::Harness::Debug> will override this, or you can use the C<-d> switch in the F<prove> utility. =item C<HARNESS_FILELEAK_IN_DIR> When set to the name of a directory, harness will check after each test whether new files appeared in that directory, and report them as LEAKED FILES: scr.tmp 0 my.db If relative, directory name is with respect to the current directory at the moment runtests() was called. Putting absolute path into C<HARNESS_FILELEAK_IN_DIR> may give more predictable results. =item C<HARNESS_IGNORE_EXITCODE> Makes harness ignore the exit status of child processes when defined. =item C<HARNESS_NOTTY> When set to a true value, forces it to behave as though STDOUT were not a console. You may need to set this if you don't want harness to output more frequent progress messages using carriage returns. Some consoles may not handle carriage returns properly (which results in a somewhat messy output). =item C<HARNESS_OK_SLOW> If true, the C<ok> messages are printed out only every second. This reduces output and may help increase testing speed over slow connections, or with very large numbers of tests. =item C<HARNESS_PERL> Usually your tests will be run by C<$^X>, the currently-executing Perl. However, you may want to have it run by a different executable, such as a threading perl, or a different version. If you're using the F<prove> utility, you can use the C<--perl> switch. =item C<HARNESS_PERL_SWITCHES> Its value will be prepended to the switches used to invoke perl on each test. For example, setting C<HARNESS_PERL_SWITCHES> to C<-W> will run all tests with all warnings enabled. =item C<HARNESS_VERBOSE> If true, Test::Harness will output the verbose results of running its tests. Setting C<$Test::Harness::verbose> will override this, or you can use the C<-v> switch in the F<prove> utility. =back =head1 EXAMPLE Here's how Test::Harness tests itself $ cd ~/src/devel/Test-Harness $ perl -Mblib -e 'use Test::Harness qw(&runtests $verbose); $verbose=0; runtests @ARGV;' t/*.t Using /home/schwern/src/devel/Test-Harness/blib t/base..............ok t/nonumbers.........ok t/ok................ok t/test-harness......ok All tests successful. Files=4, Tests=24, 2 wallclock secs ( 0.61 cusr + 0.41 csys = 1.02 CPU) =head1 SEE ALSO L<Test> and L<Test::Simple> for writing test scripts, L<Benchmark> for the underlying timing routines, L<Devel::CoreStack> to generate core dumps from failed tests and L<Devel::Cover> for test coverage analysis. =head1 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. Andreas Koenig held the torch for many years, and then Michael G Schwern. Current maintainer is Andy Lester C<< <andy@petdance.com> >>. =head1 LICENSE This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See L<http://www.perl.com/perl/misc/Artistic.html> =head1 TODO Provide a way of running tests quietly (ie. no printing) for automated validation of tests. This will probably take the form of a version of runtests() which rather than printing its output returns raw data on the state of the tests. (Partially done in Test::Harness::Straps) Document the format. Fix HARNESS_COMPILE_TEST without breaking its core usage. Figure a way to report test names in the failure summary. Rework the test summary so long test names are not truncated as badly. (Partially done with new skip test styles) Deal with VMS's "not \nok 4\n" mistake. Add option for coverage analysis. Trap STDERR. Implement Straps total_results() Remember exit code Completely redo the print summary code. Implement Straps callbacks. (experimentally implemented) Straps->analyze_file() not taint clean, don't know if it can be Fix that damned VMS nit. HARNESS_TODOFAIL to display TODO failures Add a test for verbose. Change internal list of test results to a hash. Fix stats display when there's an overrun. Fix so perls with spaces in the filename work. =for _private Keeping whittling away at _run_all_tests() =for _private Clean up how the summary is printed. Get rid of those damned formats. =head1 BUGS HARNESS_COMPILE_TEST currently assumes it's run from the Perl source directory. Please use the CPAN bug ticketing system at L<http://rt.cpan.org/>. You can also mail bugs, fixes and enhancements to C<< <bug-test-harness@rt.cpan.org> >>. =head1 AUTHORS Original code by Michael G Schwern, maintained by Andy Lester. =head1 COPYRIGHT Copyright 2003 by Michael G Schwern C<< <schwern@pobox.com> >>, Andy Lester C<< <andy@petdance.com> >>. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See L<http://www.perl.com/perl/misc/Artistic.html>. =cut