tests/testHelpers.inc

   1 <?php
   2 /**
   3  * Recording for passing/failing tests.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup Testing
  22  */
  23
  24 /**
  25  * Interface to record parser test results.
  26  *
  27  * The ITestRecorder is a very simple interface to record the result of
  28  * MediaWiki parser tests. One should call start() before running the
  29  * full parser tests and end() once all the tests have been finished.
  30  * After each test, you should use record() to keep track of your tests
  31  * results. Finally, report() is used to generate a summary of your
  32  * test run, one could dump it to the console for human consumption or
  33  * register the result in a database for tracking purposes.
  34  *
  35  * @since 1.22
  36  */
  37 interface ITestRecorder {
  38
  39         /**
  40          * Called at beginning of the parser test run
  41          */
  42         public function start();
  43
  44         /**
  45          * Called after each test
  46          * @param string $test
  47          * @param bool $result
  48          */
  49         public function record( $test, $result );
  50
  51         /**
  52          * Called before finishing the test run
  53          */
  54         public function report();
  55
  56         /**
  57          * Called at the end of the parser test run
  58          */
  59         public function end();
  60
  61 }
  62
  63 class TestRecorder implements ITestRecorder {
  64         public $parent;
  65         public $term;
  66
  67         function __construct( $parent ) {
  68                 $this->parent = $parent;
  69                 $this->term = $parent->term;
  70         }
  71
  72         function start() {
  73                 $this->total = 0;
  74                 $this->success = 0;
  75         }
  76
  77         function record( $test, $result ) {
  78                 $this->total++;
  79                 $this->success += ( $result ? 1 : 0 );
  80         }
  81
  82         function end() {
  83                 // dummy
  84         }
  85
  86         function report() {
  87                 if ( $this->total > 0 ) {
  88                         $this->reportPercentage( $this->success, $this->total );
  89                 } else {
  90                         throw new MWException( "No tests found.\n" );
  91                 }
  92         }
  93
  94         function reportPercentage( $success, $total ) {
  95                 $ratio = wfPercent( 100 * $success / $total );
  96                 print $this->term->color( 1 ) . "Passed $success of $total tests ($ratio)... ";
  97
  98                 if ( $success == $total ) {
  99                         print $this->term->color( 32 ) . "ALL TESTS PASSED!";
 100                 } else {
 101                         $failed = $total - $success;
 102                         print $this->term->color( 31 ) . "$failed tests failed!";
 103                 }
 104
 105                 print $this->term->reset() . "\n";
 106
 107                 return ( $success == $total );
 108         }
 109 }
 110
 111 class DbTestPreviewer extends TestRecorder {
 112         protected $lb; // /< Database load balancer
 113         protected $db; // /< Database connection to the main DB
 114         protected $curRun; // /< run ID number for the current run
 115         protected $prevRun; // /< run ID number for the previous run, if any
 116         protected $results; // /< Result array
 117
 118         /**
 119          * This should be called before the table prefix is changed
 120          * @param TestRecorder $parent
 121          */
 122         function __construct( $parent ) {
 123                 parent::__construct( $parent );
 124
 125                 $this->lb = wfGetLBFactory()->newMainLB();
 126                 // This connection will have the wiki's table prefix, not parsertest_
 127                 $this->db = $this->lb->getConnection( DB_MASTER );
 128         }
 129
 130         /**
 131          * Set up result recording; insert a record for the run with the date
 132          * and all that fun stuff
 133          */
 134         function start() {
 135                 parent::start();
 136
 137                 if ( !$this->db->tableExists( 'testrun', __METHOD__ )
 138                         || !$this->db->tableExists( 'testitem', __METHOD__ )
 139                 ) {
 140                         print "WARNING> `testrun` table not found in database.\n";
 141                         $this->prevRun = false;
 142                 } else {
 143                         // We'll make comparisons against the previous run later...
 144                         $this->prevRun = $this->db->selectField( 'testrun', 'MAX(tr_id)' );
 145                 }
 146
 147                 $this->results = array();
 148         }
 149
 150         function record( $test, $result ) {
 151                 parent::record( $test, $result );
 152                 $this->results[$test] = $result;
 153         }
 154
 155         function report() {
 156                 if ( $this->prevRun ) {
 157                         // f = fail, p = pass, n = nonexistent
 158                         // codes show before then after
 159                         $table = array(
 160                                 'fp' => 'previously failing test(s) now PASSING! :)',
 161                                 'pn' => 'previously PASSING test(s) removed o_O',
 162                                 'np' => 'new PASSING test(s) :)',
 163
 164                                 'pf' => 'previously passing test(s) now FAILING! :(',
 165                                 'fn' => 'previously FAILING test(s) removed O_o',
 166                                 'nf' => 'new FAILING test(s) :(',
 167                                 'ff' => 'still FAILING test(s) :(',
 168                         );
 169
 170                         $prevResults = array();
 171
 172                         $res = $this->db->select( 'testitem', array( 'ti_name', 'ti_success' ),
 173                                 array( 'ti_run' => $this->prevRun ), __METHOD__ );
 174
 175                         foreach ( $res as $row ) {
 176                                 if ( !$this->parent->regex
 177                                         || preg_match( "/{$this->parent->regex}/i", $row->ti_name )
 178                                 ) {
 179                                         $prevResults[$row->ti_name] = $row->ti_success;
 180                                 }
 181                         }
 182
 183                         $combined = array_keys( $this->results + $prevResults );
 184
 185                         # Determine breakdown by change type
 186                         $breakdown = array();
 187                         foreach ( $combined as $test ) {
 188                                 if ( !isset( $prevResults[$test] ) ) {
 189                                         $before = 'n';
 190                                 } elseif ( $prevResults[$test] == 1 ) {
 191                                         $before = 'p';
 192                                 } else /* if ( $prevResults[$test] == 0 )*/ {
 193                                         $before = 'f';
 194                                 }
 195
 196                                 if ( !isset( $this->results[$test] ) ) {
 197                                         $after = 'n';
 198                                 } elseif ( $this->results[$test] == 1 ) {
 199                                         $after = 'p';
 200                                 } else /*if ( $this->results[$test] == 0 ) */ {
 201                                         $after = 'f';
 202                                 }
 203
 204                                 $code = $before . $after;
 205
 206                                 if ( isset( $table[$code] ) ) {
 207                                         $breakdown[$code][$test] = $this->getTestStatusInfo( $test, $after );
 208                                 }
 209                         }
 210
 211                         # Write out results
 212                         foreach ( $table as $code => $label ) {
 213                                 if ( !empty( $breakdown[$code] ) ) {
 214                                         $count = count( $breakdown[$code] );
 215                                         printf( "\n%4d %s\n", $count, $label );
 216
 217                                         foreach ( $breakdown[$code] as $differing_test_name => $statusInfo ) {
 218                                                 print "      * $differing_test_name  [$statusInfo]\n";
 219                                         }
 220                                 }
 221                         }
 222                 } else {
 223                         print "No previous test runs to compare against.\n";
 224                 }
 225
 226                 print "\n";
 227                 parent::report();
 228         }
 229
 230         /**
 231          * Returns a string giving information about when a test last had a status change.
 232          * Could help to track down when regressions were introduced, as distinct from tests
 233          * which have never passed (which are more change requests than regressions).
 234          * @param string $testname
 235          * @param string $after
 236          * @return string
 237          */
 238         private function getTestStatusInfo( $testname, $after ) {
 239                 // If we're looking at a test that has just been removed, then say when it first appeared.
 240                 if ( $after == 'n' ) {
 241                         $changedRun = $this->db->selectField( 'testitem',
 242                                 'MIN(ti_run)',
 243                                 array( 'ti_name' => $testname ),
 244                                 __METHOD__ );
 245                         $appear = $this->db->selectRow( 'testrun',
 246                                 array( 'tr_date', 'tr_mw_version' ),
 247                                 array( 'tr_id' => $changedRun ),
 248                                 __METHOD__ );
 249
 250                         return "First recorded appearance: "
 251                                 . date( "d-M-Y H:i:s", strtotime( $appear->tr_date ) )
 252                                 . ", " . $appear->tr_mw_version;
 253                 }
 254
 255                 // Otherwise, this test has previous recorded results.
 256                 // See when this test last had a different result to what we're seeing now.
 257                 $conds = array(
 258                         'ti_name' => $testname,
 259                         'ti_success' => ( $after == 'f' ? "1" : "0" ) );
 260
 261                 if ( $this->curRun ) {
 262                         $conds[] = "ti_run != " . $this->db->addQuotes( $this->curRun );
 263                 }
 264
 265                 $changedRun = $this->db->selectField( 'testitem', 'MAX(ti_run)', $conds, __METHOD__ );
 266
 267                 // If no record of ever having had a different result.
 268                 if ( is_null( $changedRun ) ) {
 269                         if ( $after == "f" ) {
 270                                 return "Has never passed";
 271                         } else {
 272                                 return "Has never failed";
 273                         }
 274                 }
 275
 276                 // Otherwise, we're looking at a test whose status has changed.
 277                 // (i.e. it used to work, but now doesn't; or used to fail, but is now fixed.)
 278                 // In this situation, give as much info as we can as to when it changed status.
 279                 $pre = $this->db->selectRow( 'testrun',
 280                         array( 'tr_date', 'tr_mw_version' ),
 281                         array( 'tr_id' => $changedRun ),
 282                         __METHOD__ );
 283                 $post = $this->db->selectRow( 'testrun',
 284                         array( 'tr_date', 'tr_mw_version' ),
 285                         array( "tr_id > " . $this->db->addQuotes( $changedRun ) ),
 286                         __METHOD__,
 287                         array( "LIMIT" => 1, "ORDER BY" => 'tr_id' )
 288                 );
 289
 290                 if ( $post ) {
 291                         $postDate = date( "d-M-Y H:i:s", strtotime( $post->tr_date ) ) . ", {$post->tr_mw_version}";
 292                 } else {
 293                         $postDate = 'now';
 294                 }
 295
 296                 return ( $after == "f" ? "Introduced" : "Fixed" ) . " between "
 297                         . date( "d-M-Y H:i:s", strtotime( $pre->tr_date ) ) . ", " . $pre->tr_mw_version
 298                         . " and $postDate";
 299         }
 300
 301         /**
 302          * Commit transaction and clean up for result recording
 303          */
 304         function end() {
 305                 $this->lb->commitMasterChanges();
 306                 $this->lb->closeAll();
 307                 parent::end();
 308         }
 309 }
 310
 311 class DbTestRecorder extends DbTestPreviewer {
 312         public $version;
 313
 314         /**
 315          * Set up result recording; insert a record for the run with the date
 316          * and all that fun stuff
 317          */
 318         function start() {
 319                 $this->db->begin( __METHOD__ );
 320
 321                 if ( !$this->db->tableExists( 'testrun' )
 322                         || !$this->db->tableExists( 'testitem' )
 323                 ) {
 324                         print "WARNING> `testrun` table not found in database. Trying to create table.\n";
 325                         $this->db->sourceFile( $this->db->patchPath( 'patch-testrun.sql' ) );
 326                         echo "OK, resuming.\n";
 327                 }
 328
 329                 parent::start();
 330
 331                 $this->db->insert( 'testrun',
 332                         array(
 333                                 'tr_date' => $this->db->timestamp(),
 334                                 'tr_mw_version' => $this->version,
 335                                 'tr_php_version' => PHP_VERSION,
 336                                 'tr_db_version' => $this->db->getServerVersion(),
 337                                 'tr_uname' => php_uname()
 338                         ),
 339                         __METHOD__ );
 340                 if ( $this->db->getType() === 'postgres' ) {
 341                         $this->curRun = $this->db->currentSequenceValue( 'testrun_id_seq' );
 342                 } else {
 343                         $this->curRun = $this->db->insertId();
 344                 }
 345         }
 346
 347         /**
 348          * Record an individual test item's success or failure to the db
 349          *
 350          * @param string $test
 351          * @param bool $result
 352          */
 353         function record( $test, $result ) {
 354                 parent::record( $test, $result );
 355
 356                 $this->db->insert( 'testitem',
 357                         array(
 358                                 'ti_run' => $this->curRun,
 359                                 'ti_name' => $test,
 360                                 'ti_success' => $result ? 1 : 0,
 361                         ),
 362                         __METHOD__ );
 363         }
 364 }
 365
 366 class TestFileIterator implements Iterator {
 367         private $file;
 368         private $fh;
 369         /**
 370          * @var ParserTest|MediaWikiParserTest An instance of ParserTest (parserTests.php)
 371          *  or MediaWikiParserTest (phpunit)
 372          */
 373         private $parserTest;
 374         private $index = 0;
 375         private $test;
 376         private $section = null;
 377         /** String|null: current test section being analyzed */
 378         private $sectionData = array();
 379         private $lineNum;
 380         private $eof;
 381         # Create a fake parser tests which never run anything unless
 382         # asked to do so. This will avoid running hooks for a disabled test
 383         private $delayedParserTest;
 384         private $nextSubTest = 0;
 385
 386         function __construct( $file, $parserTest ) {
 387                 $this->file = $file;
 388                 $this->fh = fopen( $this->file, "rt" );
 389
 390                 if ( !$this->fh ) {
 391                         throw new MWException( "Couldn't open file '$file'\n" );
 392                 }
 393
 394                 $this->parserTest = $parserTest;
 395                 $this->delayedParserTest = new DelayedParserTest();
 396
 397                 $this->lineNum = $this->index = 0;
 398         }
 399
 400         function rewind() {
 401                 if ( fseek( $this->fh, 0 ) ) {
 402                         throw new MWException( "Couldn't fseek to the start of '$this->file'\n" );
 403                 }
 404
 405                 $this->index = -1;
 406                 $this->lineNum = 0;
 407                 $this->eof = false;
 408                 $this->next();
 409
 410                 return true;
 411         }
 412
 413         function current() {
 414                 return $this->test;
 415         }
 416
 417         function key() {
 418                 return $this->index;
 419         }
 420
 421         function next() {
 422                 if ( $this->readNextTest() ) {
 423                         $this->index++;
 424                         return true;
 425                 } else {
 426                         $this->eof = true;
 427                 }
 428         }
 429
 430         function valid() {
 431                 return $this->eof != true;
 432         }
 433
 434         function setupCurrentTest() {
 435                 // "input" and "result" are old section names allowed
 436                 // for backwards-compatibility.
 437                 $input = $this->checkSection( array( 'wikitext', 'input' ), false );
 438                 $result = $this->checkSection( array( 'html/php', 'html/*', 'html', 'result' ), false );
 439                 // some tests have "with tidy" and "without tidy" variants
 440                 $tidy = $this->checkSection( array( 'html/php+tidy', 'html+tidy' ), false );
 441                 if ( $tidy != false ) {
 442                         if ( $this->nextSubTest == 0 ) {
 443                                 if ( $result != false ) {
 444                                         $this->nextSubTest = 1; // rerun non-tidy variant later
 445                                 }
 446                                 $result = $tidy;
 447                         } else {
 448                                 $this->nextSubTest = 0; // go on to next test after this
 449                                 $tidy = false;
 450                         }
 451                 }
 452
 453                 if ( !isset( $this->sectionData['options'] ) ) {
 454                         $this->sectionData['options'] = '';
 455                 }
 456
 457                 if ( !isset( $this->sectionData['config'] ) ) {
 458                         $this->sectionData['config'] = '';
 459                 }
 460
 461                 $isDisabled = preg_match( '/\\bdisabled\\b/i', $this->sectionData['options'] ) && !$this->parserTest->runDisabled;
 462                 $isParsoidOnly = preg_match( '/\\bparsoid\\b/i', $this->sectionData['options'] ) && $result == 'html' && !$this->parserTest->runParsoid;
 463                 $isFiltered = !preg_match( "/" . $this->parserTest->regex . "/i", $this->sectionData['test'] );
 464                 if ( $input == false || $result == false || $isDisabled || $isParsoidOnly || $isFiltered ) {
 465                         # disabled test
 466                         return false;
 467                 }
 468
 469                 # We are really going to run the test, run pending hooks and hooks function
 470                 wfDebug( __METHOD__ . " unleashing delayed test for: {$this->sectionData['test']}" );
 471                 $hooksResult = $this->delayedParserTest->unleash( $this->parserTest );
 472                 if ( !$hooksResult ) {
 473                         # Some hook reported an issue. Abort.
 474                         throw new MWException( "Problem running hook" );
 475                 }
 476
 477                 $this->test = array(
 478                         'test' => ParserTest::chomp( $this->sectionData['test'] ),
 479                         'input' => ParserTest::chomp( $this->sectionData[$input] ),
 480                         'result' => ParserTest::chomp( $this->sectionData[$result] ),
 481                         'options' => ParserTest::chomp( $this->sectionData['options'] ),
 482                         'config' => ParserTest::chomp( $this->sectionData['config'] ),
 483                 );
 484                 if ( $tidy != false ) {
 485                         $this->test['options'] .= " tidy";
 486                 }
 487                 return true;
 488         }
 489
 490         function readNextTest() {
 491                 # Run additional subtests of previous test
 492                 while ( $this->nextSubTest > 0 ) {
 493                         if ( $this->setupCurrentTest() ) {
 494                                 return true;
 495                         }
 496                 }
 497
 498                 $this->clearSection();
 499                 # Reset hooks for the delayed test object
 500                 $this->delayedParserTest->reset();
 501
 502                 while ( false !== ( $line = fgets( $this->fh ) ) ) {
 503                         $this->lineNum++;
 504                         $matches = array();
 505
 506                         if ( preg_match( '/^!!\s*(\S+)/', $line, $matches ) ) {
 507                                 $this->section = strtolower( $matches[1] );
 508
 509                                 if ( $this->section == 'endarticle' ) {
 510                                         $this->checkSection( 'text' );
 511                                         $this->checkSection( 'article' );
 512
 513                                         $this->parserTest->addArticle(
 514                                                 ParserTest::chomp( $this->sectionData['article'] ),
 515                                                 $this->sectionData['text'], $this->lineNum );
 516
 517                                         $this->clearSection();
 518
 519                                         continue;
 520                                 }
 521
 522                                 if ( $this->section == 'endhooks' ) {
 523                                         $this->checkSection( 'hooks' );
 524
 525                                         foreach ( explode( "\n", $this->sectionData['hooks'] ) as $line ) {
 526                                                 $line = trim( $line );
 527
 528                                                 if ( $line ) {
 529                                                         $this->delayedParserTest->requireHook( $line );
 530                                                 }
 531                                         }
 532
 533                                         $this->clearSection();
 534
 535                                         continue;
 536                                 }
 537
 538                                 if ( $this->section == 'endfunctionhooks' ) {
 539                                         $this->checkSection( 'functionhooks' );
 540
 541                                         foreach ( explode( "\n", $this->sectionData['functionhooks'] ) as $line ) {
 542                                                 $line = trim( $line );
 543
 544                                                 if ( $line ) {
 545                                                         $this->delayedParserTest->requireFunctionHook( $line );
 546                                                 }
 547                                         }
 548
 549                                         $this->clearSection();
 550
 551                                         continue;
 552                                 }
 553
 554                                 if ( $this->section == 'endtransparenthooks' ) {
 555                                         $this->checkSection( 'transparenthooks' );
 556
 557                                         foreach ( explode( "\n", $this->sectionData['transparenthooks'] ) as $line ) {
 558                                                 $line = trim( $line );
 559
 560                                                 if ( $line ) {
 561                                                         $this->delayedParserTest->requireTransparentHook( $line );
 562                                                 }
 563                                         }
 564
 565                                         $this->clearSection();
 566
 567                                         continue;
 568                                 }
 569
 570                                 if ( $this->section == 'end' ) {
 571                                         $this->checkSection( 'test' );
 572                                         do {
 573                                                 if ( $this->setupCurrentTest() ) {
 574                                                         return true;
 575                                                 }
 576                                         } while ( $this->nextSubTest > 0 );
 577                                         # go on to next test (since this was disabled)
 578                                         $this->clearSection();
 579                                         $this->delayedParserTest->reset();
 580                                         continue;
 581                                 }
 582
 583                                 if ( isset( $this->sectionData[$this->section] ) ) {
 584                                         throw new MWException( "duplicate section '$this->section' "
 585                                                 . "at line {$this->lineNum} of $this->file\n" );
 586                                 }
 587
 588                                 $this->sectionData[$this->section] = '';
 589
 590                                 continue;
 591                         }
 592
 593                         if ( $this->section ) {
 594                                 $this->sectionData[$this->section] .= $line;
 595                         }
 596                 }
 597
 598                 return false;
 599         }
 600
 601         /**
 602          * Clear section name and its data
 603          */
 604         private function clearSection() {
 605                 $this->sectionData = array();
 606                 $this->section = null;
 607
 608         }
 609
 610         /**
 611          * Verify the current section data has some value for the given token
 612          * name(s) (first parameter).
 613          * Throw an exception if it is not set, referencing current section
 614          * and adding the current file name and line number
 615          *
 616          * @param string|array $tokens Expected token(s) that should have been
 617          * mentioned before closing this section
 618          * @param bool $fatal True iff an exception should be thrown if
 619          * the section is not found.
 620          * @return bool|string
 621          */
 622         private function checkSection( $tokens, $fatal = true ) {
 623                 if ( is_null( $this->section ) ) {
 624                         throw new MWException( __METHOD__ . " can not verify a null section!\n" );
 625                 }
 626                 if ( !is_array( $tokens ) ) {
 627                         $tokens = array( $tokens );
 628                 }
 629                 if ( count( $tokens ) == 0 ) {
 630                         throw new MWException( __METHOD__ . " can not verify zero sections!\n" );
 631                 }
 632
 633                 $data = $this->sectionData;
 634                 $tokens = array_filter( $tokens, function ( $token ) use ( $data ) {
 635                         return isset( $data[$token] );
 636                 } );
 637
 638                 if ( count( $tokens ) == 0 ) {
 639                         if ( !$fatal ) {
 640                                 return false;
 641                         }
 642                         throw new MWException( sprintf(
 643                                 "'%s' without '%s' at line %s of %s\n",
 644                                 $this->section,
 645                                 implode( ',', $tokens ),
 646                                 $this->lineNum,
 647                                 $this->file
 648                         ) );
 649                 }
 650                 if ( count( $tokens ) > 1 ) {
 651                         throw new MWException( sprintf(
 652                                 "'%s' with unexpected tokens '%s' at line %s of %s\n",
 653                                 $this->section,
 654                                 implode( ',', $tokens ),
 655                                 $this->lineNum,
 656                                 $this->file
 657                         ) );
 658                 }
 659
 660                 $tokens = array_values( $tokens );
 661                 return $tokens[0];
 662         }
 663 }
 664
 665 /**
 666  * A class to delay execution of a parser test hooks.
 667  */
 668 class DelayedParserTest {
 669
 670         /** Initialized on construction */
 671         private $hooks;
 672         private $fnHooks;
 673         private $transparentHooks;
 674
 675         public function __construct() {
 676                 $this->reset();
 677         }
 678
 679         /**
 680          * Init/reset or forgot about the current delayed test.
 681          * Call to this will erase any hooks function that were pending.
 682          */
 683         public function reset() {
 684                 $this->hooks = array();
 685                 $this->fnHooks = array();
 686                 $this->transparentHooks = array();
 687         }
 688
 689         /**
 690          * Called whenever we actually want to run the hook.
 691          * Should be the case if we found the parserTest is not disabled
 692          * @param ParserTest|NewParserTest $parserTest
 693          * @return bool
 694          */
 695         public function unleash( &$parserTest ) {
 696                 if ( !( $parserTest instanceof ParserTest || $parserTest instanceof NewParserTest )     ) {
 697                         throw new MWException( __METHOD__ . " must be passed an instance of ParserTest or "
 698                                 . "NewParserTest classes\n" );
 699                 }
 700
 701                 # Trigger delayed hooks. Any failure will make us abort
 702                 foreach ( $this->hooks as $hook ) {
 703                         $ret = $parserTest->requireHook( $hook );
 704                         if ( !$ret ) {
 705                                 return false;
 706                         }
 707                 }
 708
 709                 # Trigger delayed function hooks. Any failure will make us abort
 710                 foreach ( $this->fnHooks as $fnHook ) {
 711                         $ret = $parserTest->requireFunctionHook( $fnHook );
 712                         if ( !$ret ) {
 713                                 return false;
 714                         }
 715                 }
 716
 717                 # Trigger delayed transparent hooks. Any failure will make us abort
 718                 foreach ( $this->transparentHooks as $hook ) {
 719                         $ret = $parserTest->requireTransparentHook( $hook );
 720                         if ( !$ret ) {
 721                                 return false;
 722                         }
 723                 }
 724
 725                 # Delayed execution was successful.
 726                 return true;
 727         }
 728
 729         /**
 730          * Similar to ParserTest object but does not run anything
 731          * Use unleash() to really execute the hook
 732          * @param string $hook
 733          */
 734         public function requireHook( $hook ) {
 735                 $this->hooks[] = $hook;
 736         }
 737
 738         /**
 739          * Similar to ParserTest object but does not run anything
 740          * Use unleash() to really execute the hook function
 741          * @param string $fnHook
 742          */
 743         public function requireFunctionHook( $fnHook ) {
 744                 $this->fnHooks[] = $fnHook;
 745         }
 746
 747         /**
 748          * Similar to ParserTest object but does not run anything
 749          * Use unleash() to really execute the hook function
 750          * @param string $hook
 751          */
 752         public function requireTransparentHook( $hook ) {
 753                 $this->transparentHooks[] = $hook;
 754         }
 755
 756 }
 757
 758 /**
 759  * Initialize and detect the DjVu files support
 760  */
 761 class DjVuSupport {
 762
 763         /**
 764          * Initialises DjVu tools global with default values
 765          */
 766         public function __construct() {
 767                 global $wgDjvuRenderer, $wgDjvuDump, $wgDjvuToXML, $wgFileExtensions, $wgDjvuTxt;
 768
 769                 $wgDjvuRenderer = $wgDjvuRenderer ? $wgDjvuRenderer : '/usr/bin/ddjvu';
 770                 $wgDjvuDump = $wgDjvuDump ? $wgDjvuDump : '/usr/bin/djvudump';
 771                 $wgDjvuToXML = $wgDjvuToXML ? $wgDjvuToXML : '/usr/bin/djvutoxml';
 772                 $wgDjvuTxt = $wgDjvuTxt ? $wgDjvuTxt : '/usr/bin/djvutxt';
 773
 774                 if ( !in_array( 'djvu', $wgFileExtensions ) ) {
 775                         $wgFileExtensions[] = 'djvu';
 776                 }
 777         }
 778
 779         /**
 780          * Returns true if the DjVu tools are usable
 781          *
 782          * @return bool
 783          */
 784         public function isEnabled() {
 785                 global $wgDjvuRenderer, $wgDjvuDump, $wgDjvuToXML, $wgDjvuTxt;
 786
 787                 return is_executable( $wgDjvuRenderer )
 788                         && is_executable( $wgDjvuDump )
 789                         && is_executable( $wgDjvuToXML )
 790                         && is_executable( $wgDjvuTxt );
 791         }
 792 }
 793
 794 /**
 795  * Initialize and detect the tidy support
 796  */
 797 class TidySupport {
 798         private $internalTidy;
 799         private $externalTidy;
 800
 801         /**
 802          * Determine if there is a usable tidy.
 803          */
 804         public function __construct() {
 805                 global $wgTidyBin;
 806
 807                 $this->internalTidy = extension_loaded( 'tidy' ) &&
 808                         class_exists( 'tidy' );
 809
 810                 $this->externalTidy = is_executable( $wgTidyBin ) ||
 811                         Installer::locateExecutableInDefaultPaths( array( $wgTidyBin ) )
 812                         !== false;
 813         }
 814
 815         /**
 816          * Returns true if we should use internal tidy.
 817          *
 818          * @return bool
 819          */
 820         public function isInternal() {
 821                 return $this->internalTidy;
 822         }
 823
 824         /**
 825          * Returns true if tidy is usable
 826          *
 827          * @return bool
 828          */
 829         public function isEnabled() {
 830                 return $this->internalTidy || $this->externalTidy;
 831         }
 832 }