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1 | # -*- Mode: cperl; cperl-indent-level: 4 -*- |
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2 | # $Id: Straps.pm,v 1.16 2003/02/02 05:27:44 schwern Exp $ |
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3 | |
4 | package Test::Harness::Straps; |
5 | |
6 | use strict; |
7 | use vars qw($VERSION); |
8 | use Config; |
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9 | $VERSION = '0.14'; |
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10 | |
11 | use Test::Harness::Assert; |
12 | use Test::Harness::Iterator; |
13 | |
14 | # Flags used as return values from our methods. Just for internal |
15 | # clarification. |
16 | my $TRUE = (1==1); |
17 | my $FALSE = !$TRUE; |
18 | my $YES = $TRUE; |
19 | my $NO = $FALSE; |
20 | |
21 | |
22 | =head1 NAME |
23 | |
24 | Test::Harness::Straps - detailed analysis of test results |
25 | |
26 | =head1 SYNOPSIS |
27 | |
28 | use Test::Harness::Straps; |
29 | |
30 | my $strap = Test::Harness::Straps->new; |
31 | |
32 | # Various ways to interpret a test |
33 | my %results = $strap->analyze($name, \@test_output); |
34 | my %results = $strap->analyze_fh($name, $test_filehandle); |
35 | my %results = $strap->analyze_file($test_file); |
36 | |
37 | # UNIMPLEMENTED |
38 | my %total = $strap->total_results; |
39 | |
40 | # Altering the behavior of the strap UNIMPLEMENTED |
41 | my $verbose_output = $strap->dump_verbose(); |
42 | $strap->dump_verbose_fh($output_filehandle); |
43 | |
44 | |
45 | =head1 DESCRIPTION |
46 | |
47 | B<THIS IS ALPHA SOFTWARE> in that the interface is subject to change |
48 | in incompatible ways. It is otherwise stable. |
49 | |
50 | Test::Harness is limited to printing out its results. This makes |
51 | analysis of the test results difficult for anything but a human. To |
52 | make it easier for programs to work with test results, we provide |
53 | Test::Harness::Straps. Instead of printing the results, straps |
54 | provide them as raw data. You can also configure how the tests are to |
55 | be run. |
56 | |
57 | The interface is currently incomplete. I<Please> contact the author |
58 | if you'd like a feature added or something change or just have |
59 | comments. |
60 | |
61 | =head2 Construction |
62 | |
63 | =over 4 |
64 | |
65 | =item B<new> |
66 | |
67 | my $strap = Test::Harness::Straps->new; |
68 | |
69 | Initialize a new strap. |
70 | |
71 | =cut |
72 | |
73 | sub new { |
74 | my($proto) = shift; |
75 | my($class) = ref $proto || $proto; |
76 | |
77 | my $self = bless {}, $class; |
78 | $self->_init; |
79 | |
80 | return $self; |
81 | } |
82 | |
83 | =begin _private |
84 | |
85 | =item B<_init> |
86 | |
87 | $strap->_init; |
88 | |
89 | Initialize the internal state of a strap to make it ready for parsing. |
90 | |
91 | =cut |
92 | |
93 | sub _init { |
94 | my($self) = shift; |
95 | |
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96 | $self->{_is_vms} = $^O eq 'VMS'; |
97 | $self->{_is_win32} = $^O eq 'Win32'; |
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98 | } |
99 | |
100 | =end _private |
101 | |
102 | =back |
103 | |
104 | =head2 Analysis |
105 | |
106 | =over 4 |
107 | |
108 | =item B<analyze> |
109 | |
110 | my %results = $strap->analyze($name, \@test_output); |
111 | |
112 | Analyzes the output of a single test, assigning it the given $name for |
113 | use in the total report. Returns the %results of the test. See |
114 | L<Results>. |
115 | |
116 | @test_output should be the raw output from the test, including newlines. |
117 | |
118 | =cut |
119 | |
120 | sub analyze { |
121 | my($self, $name, $test_output) = @_; |
122 | |
123 | my $it = Test::Harness::Iterator->new($test_output); |
124 | return $self->_analyze_iterator($name, $it); |
125 | } |
126 | |
127 | |
128 | sub _analyze_iterator { |
129 | my($self, $name, $it) = @_; |
130 | |
131 | $self->_reset_file_state; |
132 | $self->{file} = $name; |
133 | my %totals = ( |
134 | max => 0, |
135 | seen => 0, |
136 | |
137 | ok => 0, |
138 | todo => 0, |
139 | skip => 0, |
140 | bonus => 0, |
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141 | |
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142 | details => [] |
143 | ); |
144 | |
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145 | # Set them up here so callbacks can have them. |
146 | $self->{totals}{$name} = \%totals; |
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147 | while( defined(my $line = $it->next) ) { |
148 | $self->_analyze_line($line, \%totals); |
149 | last if $self->{saw_bailout}; |
150 | } |
151 | |
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152 | $totals{skip_all} = $self->{skip_all} if defined $self->{skip_all}; |
153 | |
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154 | my $passed = ($totals{max} == 0 && defined $totals{skip_all}) || |
155 | ($totals{max} && $totals{seen} && |
156 | $totals{max} == $totals{seen} && |
157 | $totals{max} == $totals{ok}); |
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158 | $totals{passing} = $passed ? 1 : 0; |
159 | |
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160 | return %totals; |
161 | } |
162 | |
163 | |
164 | sub _analyze_line { |
165 | my($self, $line, $totals) = @_; |
166 | |
167 | my %result = (); |
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168 | |
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169 | $self->{line}++; |
170 | |
171 | my $type; |
172 | if( $self->_is_header($line) ) { |
173 | $type = 'header'; |
174 | |
175 | $self->{saw_header}++; |
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176 | |
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177 | $totals->{max} += $self->{max}; |
178 | } |
179 | elsif( $self->_is_test($line, \%result) ) { |
180 | $type = 'test'; |
181 | |
182 | $totals->{seen}++; |
183 | $result{number} = $self->{'next'} unless $result{number}; |
184 | |
185 | # sometimes the 'not ' and the 'ok' are on different lines, |
186 | # happens often on VMS if you do: |
187 | # print "not " unless $test; |
188 | # print "ok $num\n"; |
189 | if( $self->{saw_lone_not} && |
190 | ($self->{lone_not_line} == $self->{line} - 1) ) |
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191 | { |
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192 | $result{ok} = 0; |
193 | } |
194 | |
195 | my $pass = $result{ok}; |
196 | $result{type} = 'todo' if $self->{todo}{$result{number}}; |
197 | |
198 | if( $result{type} eq 'todo' ) { |
199 | $totals->{todo}++; |
200 | $pass = 1; |
201 | $totals->{bonus}++ if $result{ok} |
202 | } |
203 | elsif( $result{type} eq 'skip' ) { |
204 | $totals->{skip}++; |
205 | $pass = 1; |
206 | } |
207 | |
208 | $totals->{ok}++ if $pass; |
209 | |
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210 | if( $result{number} > 100000 && $result{number} > $self->{max} ) { |
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211 | warn "Enormous test number seen [test $result{number}]\n"; |
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212 | warn "Can't detailize, too big.\n"; |
213 | } |
214 | else { |
215 | $totals->{details}[$result{number} - 1] = |
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216 | {$self->_detailize($pass, \%result)}; |
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217 | } |
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218 | |
219 | # XXX handle counter mismatch |
220 | } |
221 | elsif ( $self->_is_bail_out($line, \$self->{bailout_reason}) ) { |
222 | $type = 'bailout'; |
223 | $self->{saw_bailout} = 1; |
224 | } |
225 | else { |
226 | $type = 'other'; |
227 | } |
228 | |
229 | $self->{callback}->($self, $line, $type, $totals) if $self->{callback}; |
230 | |
231 | $self->{'next'} = $result{number} + 1 if $type eq 'test'; |
232 | } |
233 | |
234 | =item B<analyze_fh> |
235 | |
236 | my %results = $strap->analyze_fh($name, $test_filehandle); |
237 | |
238 | Like C<analyze>, but it reads from the given filehandle. |
239 | |
240 | =cut |
241 | |
242 | sub analyze_fh { |
243 | my($self, $name, $fh) = @_; |
244 | |
245 | my $it = Test::Harness::Iterator->new($fh); |
246 | $self->_analyze_iterator($name, $it); |
247 | } |
248 | |
249 | =item B<analyze_file> |
250 | |
251 | my %results = $strap->analyze_file($test_file); |
252 | |
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253 | Like C<analyze>, but it runs the given $test_file and parses it's |
254 | results. It will also use that name for the total report. |
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255 | |
256 | =cut |
257 | |
258 | sub analyze_file { |
259 | my($self, $file) = @_; |
260 | |
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261 | unless( -e $file ) { |
262 | $self->{error} = "$file does not exist"; |
263 | return; |
264 | } |
265 | |
266 | unless( -r $file ) { |
267 | $self->{error} = "$file is not readable"; |
268 | return; |
269 | } |
270 | |
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271 | local $ENV{PERL5LIB} = $self->_INC2PERL5LIB; |
272 | |
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273 | my $cmd = $self->{_is_vms} ? "MCR $^X" : |
274 | $self->{_is_win32} ? Win32::GetShortPathName($^X) |
275 | : $^X; |
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276 | |
277 | my $switches = $self->_switches($file); |
278 | |
279 | # *sigh* this breaks under taint, but open -| is unportable. |
280 | unless( open(FILE, "$cmd $switches $file|") ) { |
281 | print "can't run $file. $!\n"; |
282 | return; |
283 | } |
284 | |
285 | my %results = $self->analyze_fh($file, \*FILE); |
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286 | my $exit = close FILE; |
287 | $results{'wait'} = $?; |
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288 | if( $? && $self->{_is_vms} ) { |
289 | eval q{use vmsish "status"; $results{'exit'} = $?}; |
290 | } |
291 | else { |
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292 | $results{'exit'} = _wait2exit($?); |
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293 | } |
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294 | $results{passing} = 0 unless $? == 0; |
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295 | |
296 | $self->_restore_PERL5LIB(); |
297 | |
298 | return %results; |
299 | } |
300 | |
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301 | |
302 | eval { require POSIX; &POSIX::WEXITSTATUS(0) }; |
303 | if( $@ ) { |
304 | *_wait2exit = sub { $_[0] >> 8 }; |
305 | } |
306 | else { |
307 | *_wait2exit = sub { POSIX::WEXITSTATUS($_[0]) } |
308 | } |
309 | |
310 | |
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311 | =begin _private |
312 | |
313 | =item B<_switches> |
314 | |
315 | my $switches = $self->_switches($file); |
316 | |
317 | Formats and returns the switches necessary to run the test. |
318 | |
319 | =cut |
320 | |
321 | sub _switches { |
322 | my($self, $file) = @_; |
323 | |
324 | local *TEST; |
325 | open(TEST, $file) or print "can't open $file. $!\n"; |
326 | my $first = <TEST>; |
327 | my $s = ''; |
328 | $s .= " $ENV{'HARNESS_PERL_SWITCHES'}" |
329 | if exists $ENV{'HARNESS_PERL_SWITCHES'}; |
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330 | |
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331 | if ($first =~ /^#!.*\bperl.*\s-\w*([Tt]+)/) { |
332 | # When taint mode is on, PERL5LIB is ignored. So we need to put |
333 | # all that on the command line as -Is. |
334 | $s .= join " ", qq[ "-$1"], map {qq["-I$_"]} $self->_filtered_INC; |
335 | } |
336 | elsif ($^O eq 'MacOS') { |
337 | # MacPerl's putenv is broken, so it will not see PERL5LIB. |
338 | $s .= join " ", map {qq["-I$_"]} $self->_filtered_INC; |
339 | } |
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340 | |
341 | close(TEST) or print "can't close $file. $!\n"; |
342 | |
343 | return $s; |
344 | } |
345 | |
346 | |
347 | =item B<_INC2PERL5LIB> |
348 | |
349 | local $ENV{PERL5LIB} = $self->_INC2PERL5LIB; |
350 | |
351 | Takes the current value of @INC and turns it into something suitable |
352 | for putting onto PERL5LIB. |
353 | |
354 | =cut |
355 | |
356 | sub _INC2PERL5LIB { |
357 | my($self) = shift; |
358 | |
359 | $self->{_old5lib} = $ENV{PERL5LIB}; |
360 | |
361 | return join $Config{path_sep}, $self->_filtered_INC; |
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362 | } |
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363 | |
364 | =item B<_filtered_INC> |
365 | |
366 | my @filtered_inc = $self->_filtered_INC; |
367 | |
368 | Shortens @INC by removing redundant and unnecessary entries. |
369 | Necessary for OS's with limited command line lengths, like VMS. |
370 | |
371 | =cut |
372 | |
373 | sub _filtered_INC { |
374 | my($self, @inc) = @_; |
375 | @inc = @INC unless @inc; |
376 | |
377 | # VMS has a 255-byte limit on the length of %ENV entries, so |
378 | # toss the ones that involve perl_root, the install location |
379 | # for VMS |
380 | if( $self->{_is_vms} ) { |
381 | @inc = grep !/perl_root/i, @inc; |
382 | } |
383 | |
384 | return @inc; |
385 | } |
386 | |
387 | |
388 | =item B<_restore_PERL5LIB> |
389 | |
390 | $self->_restore_PERL5LIB; |
391 | |
392 | This restores the original value of the PERL5LIB environment variable. |
393 | Necessary on VMS, otherwise a no-op. |
394 | |
395 | =cut |
396 | |
397 | sub _restore_PERL5LIB { |
398 | my($self) = shift; |
399 | |
400 | return unless $self->{_is_vms}; |
401 | |
402 | if (defined $self->{_old5lib}) { |
403 | $ENV{PERL5LIB} = $self->{_old5lib}; |
404 | } |
405 | } |
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406 | |
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407 | |
408 | =end _private |
409 | |
410 | =back |
411 | |
412 | |
413 | =begin _private |
414 | |
415 | =head2 Parsing |
416 | |
417 | Methods for identifying what sort of line you're looking at. |
418 | |
419 | =over 4 |
420 | |
421 | =item B<_is_comment> |
422 | |
423 | my $is_comment = $strap->_is_comment($line, \$comment); |
424 | |
425 | Checks if the given line is a comment. If so, it will place it into |
426 | $comment (sans #). |
427 | |
428 | =cut |
429 | |
430 | sub _is_comment { |
431 | my($self, $line, $comment) = @_; |
432 | |
433 | if( $line =~ /^\s*\#(.*)/ ) { |
434 | $$comment = $1; |
435 | return $YES; |
436 | } |
437 | else { |
438 | return $NO; |
439 | } |
440 | } |
441 | |
442 | =item B<_is_header> |
443 | |
444 | my $is_header = $strap->_is_header($line); |
445 | |
446 | Checks if the given line is a header (1..M) line. If so, it places |
447 | how many tests there will be in $strap->{max}, a list of which tests |
448 | are todo in $strap->{todo} and if the whole test was skipped |
449 | $strap->{skip_all} contains the reason. |
450 | |
451 | =cut |
452 | |
453 | # Regex for parsing a header. Will be run with /x |
454 | my $Extra_Header_Re = <<'REGEX'; |
455 | ^ |
456 | (?: \s+ todo \s+ ([\d \t]+) )? # optional todo set |
457 | (?: \s* \# \s* ([\w:]+\s?) (.*) )? # optional skip with optional reason |
458 | REGEX |
459 | |
460 | sub _is_header { |
461 | my($self, $line) = @_; |
462 | |
463 | if( my($max, $extra) = $line =~ /^1\.\.(\d+)(.*)/ ) { |
464 | $self->{max} = $max; |
465 | assert( $self->{max} >= 0, 'Max # of tests looks right' ); |
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466 | |
467 | if( defined $extra ) { |
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468 | my($todo, $skip, $reason) = $extra =~ /$Extra_Header_Re/xo; |
469 | |
470 | $self->{todo} = { map { $_ => 1 } split /\s+/, $todo } if $todo; |
471 | |
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472 | if( $self->{max} == 0 ) { |
473 | $reason = '' unless defined $skip and $skip =~ /^Skip/i; |
474 | } |
475 | |
476 | $self->{skip_all} = $reason; |
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477 | } |
478 | |
479 | return $YES; |
480 | } |
481 | else { |
482 | return $NO; |
483 | } |
484 | } |
485 | |
486 | =item B<_is_test> |
487 | |
488 | my $is_test = $strap->_is_test($line, \%test); |
489 | |
490 | Checks if the $line is a test report (ie. 'ok/not ok'). Reports the |
491 | result back in %test which will contain: |
492 | |
493 | ok did it succeed? This is the literal 'ok' or 'not ok'. |
494 | name name of the test (if any) |
495 | number test number (if any) |
496 | |
497 | type 'todo' or 'skip' (if any) |
498 | reason why is it todo or skip? (if any) |
499 | |
500 | If will also catch lone 'not' lines, note it saw them |
501 | $strap->{saw_lone_not} and the line in $strap->{lone_not_line}. |
502 | |
503 | =cut |
504 | |
505 | my $Report_Re = <<'REGEX'; |
506 | ^ |
507 | (not\ )? # failure? |
508 | ok\b |
509 | (?:\s+(\d+))? # optional test number |
510 | \s* |
511 | (.*) # and the rest |
512 | REGEX |
513 | |
514 | my $Extra_Re = <<'REGEX'; |
515 | ^ |
516 | (.*?) (?:(?:[^\\]|^)# (.*))? |
517 | $ |
518 | REGEX |
519 | |
520 | sub _is_test { |
521 | my($self, $line, $test) = @_; |
522 | |
523 | # We pulverize the line down into pieces in three parts. |
524 | if( my($not, $num, $extra) = $line =~ /$Report_Re/ox ) { |
525 | my($name, $control) = split /(?:[^\\]|^)#/, $extra if $extra; |
526 | my($type, $reason) = $control =~ /^\s*(\S+)(?:\s+(.*))?$/ if $control; |
527 | |
528 | $test->{number} = $num; |
529 | $test->{ok} = $not ? 0 : 1; |
530 | $test->{name} = $name; |
531 | |
532 | if( defined $type ) { |
533 | $test->{type} = $type =~ /^TODO$/i ? 'todo' : |
534 | $type =~ /^Skip/i ? 'skip' : 0; |
535 | } |
536 | else { |
537 | $test->{type} = ''; |
538 | } |
539 | $test->{reason} = $reason; |
540 | |
541 | return $YES; |
542 | } |
543 | else{ |
544 | # Sometimes the "not " and "ok" will be on seperate lines on VMS. |
545 | # We catch this and remember we saw it. |
546 | if( $line =~ /^not\s+$/ ) { |
547 | $self->{saw_lone_not} = 1; |
548 | $self->{lone_not_line} = $self->{line}; |
549 | } |
550 | |
551 | return $NO; |
552 | } |
553 | } |
554 | |
555 | =item B<_is_bail_out> |
556 | |
557 | my $is_bail_out = $strap->_is_bail_out($line, \$reason); |
558 | |
559 | Checks if the line is a "Bail out!". Places the reason for bailing |
560 | (if any) in $reason. |
561 | |
562 | =cut |
563 | |
564 | sub _is_bail_out { |
565 | my($self, $line, $reason) = @_; |
566 | |
567 | if( $line =~ /^Bail out!\s*(.*)/i ) { |
568 | $$reason = $1 if $1; |
569 | return $YES; |
570 | } |
571 | else { |
572 | return $NO; |
573 | } |
574 | } |
575 | |
576 | =item B<_reset_file_state> |
577 | |
578 | $strap->_reset_file_state; |
579 | |
580 | Resets things like $strap->{max}, $strap->{skip_all}, etc... so its |
581 | ready to parse the next file. |
582 | |
583 | =cut |
584 | |
585 | sub _reset_file_state { |
586 | my($self) = shift; |
587 | |
588 | delete @{$self}{qw(max skip_all todo)}; |
589 | $self->{line} = 0; |
590 | $self->{saw_header} = 0; |
591 | $self->{saw_bailout}= 0; |
592 | $self->{saw_lone_not} = 0; |
593 | $self->{lone_not_line} = 0; |
594 | $self->{bailout_reason} = ''; |
595 | $self->{'next'} = 1; |
596 | } |
597 | |
598 | =back |
599 | |
600 | =end _private |
601 | |
602 | |
603 | =head2 Results |
604 | |
605 | The %results returned from analyze() contain the following information: |
606 | |
607 | passing true if the whole test is considered a pass |
608 | (or skipped), false if its a failure |
609 | |
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610 | exit the exit code of the test run, if from a file |
611 | wait the wait code of the test run, if from a file |
612 | |
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613 | max total tests which should have been run |
614 | seen total tests actually seen |
615 | skip_all if the whole test was skipped, this will |
616 | contain the reason. |
617 | |
618 | ok number of tests which passed |
619 | (including todo and skips) |
620 | |
621 | todo number of todo tests seen |
622 | bonus number of todo tests which |
623 | unexpectedly passed |
624 | |
625 | skip number of tests skipped |
626 | |
627 | So a successful test should have max == seen == ok. |
628 | |
629 | |
630 | There is one final item, the details. |
631 | |
632 | details an array ref reporting the result of |
633 | each test looks like this: |
634 | |
635 | $results{details}[$test_num - 1] = |
636 | { ok => is the test considered ok? |
637 | actual_ok => did it literally say 'ok'? |
638 | name => name of the test (if any) |
639 | type => 'skip' or 'todo' (if any) |
640 | reason => reason for the above (if any) |
641 | }; |
642 | |
643 | Element 0 of the details is test #1. I tried it with element 1 being |
644 | #1 and 0 being empty, this is less awkward. |
645 | |
646 | =begin _private |
647 | |
648 | =over 4 |
649 | |
650 | =item B<_detailize> |
651 | |
652 | my %details = $strap->_detailize($pass, \%test); |
653 | |
654 | Generates the details based on the last test line seen. $pass is true |
655 | if it was considered to be a passed test. %test is the results of the |
656 | test you're summarizing. |
657 | |
658 | =cut |
659 | |
660 | sub _detailize { |
661 | my($self, $pass, $test) = @_; |
662 | |
663 | my %details = ( ok => $pass, |
664 | actual_ok => $test->{ok} |
665 | ); |
666 | |
667 | assert( !(grep !defined $details{$_}, keys %details), |
668 | 'test contains the ok and actual_ok info' ); |
669 | |
308957f5 |
670 | # We don't want these to be undef because they are often |
671 | # checked and don't want the checker to have to deal with |
672 | # uninitialized vars. |
13287dd5 |
673 | foreach my $piece (qw(name type reason)) { |
308957f5 |
674 | $details{$piece} = defined $test->{$piece} ? $test->{$piece} : ''; |
13287dd5 |
675 | } |
676 | |
677 | return %details; |
678 | } |
679 | |
680 | =back |
681 | |
682 | =end _private |
683 | |
684 | =head1 EXAMPLES |
685 | |
686 | See F<examples/mini_harness.plx> for an example of use. |
687 | |
688 | =head1 AUTHOR |
689 | |
690 | Michael G Schwern E<lt>schwern@pobox.comE<gt> |
691 | |
692 | =head1 SEE ALSO |
693 | |
694 | L<Test::Harness> |
695 | |
696 | =cut |
697 | |
698 | |
699 | 1; |