tests/phpunit/maintenance/backupTextPassTest.php

   1 <?php
   2
   3 require_once __DIR__ . "/../../../maintenance/backupTextPass.inc";
   4
   5 /**
   6  * Tests for TextPassDumper that rely on the database
   7  *
   8  * @group Database
   9  * @group Dump
  10  * @covers TextPassDumper
  11  */
  12 class TextPassDumperDatabaseTest extends DumpTestCase {
  13
  14         // We'll add several pages, revision and texts. The following variables hold the
  15         // corresponding ids.
  16         private $pageId1, $pageId2, $pageId3, $pageId4;
  17         private static $numOfPages = 4;
  18         private $revId1_1, $textId1_1;
  19         private $revId2_1, $textId2_1, $revId2_2, $textId2_2;
  20         private $revId2_3, $textId2_3, $revId2_4, $textId2_4;
  21         private $revId3_1, $textId3_1, $revId3_2, $textId3_2;
  22         private $revId4_1, $textId4_1;
  23         private static $numOfRevs = 8;
  24
  25         function addDBData() {
  26                 $this->tablesUsed[] = 'page';
  27                 $this->tablesUsed[] = 'revision';
  28                 $this->tablesUsed[] = 'text';
  29
  30                 $this->mergeMwGlobalArrayValue( 'wgContentHandlers', array(
  31                         "BackupTextPassTestModel" => "BackupTextPassTestModelHandler"
  32                 ) );
  33
  34                 $ns = $this->getDefaultWikitextNS();
  35
  36                 try {
  37                         // Simple page
  38                         $title = Title::newFromText( 'BackupDumperTestP1', $ns );
  39                         $page = WikiPage::factory( $title );
  40                         list( $this->revId1_1, $this->textId1_1 ) = $this->addRevision( $page,
  41                                 "BackupDumperTestP1Text1", "BackupDumperTestP1Summary1" );
  42                         $this->pageId1 = $page->getId();
  43
  44                         // Page with more than one revision
  45                         $title = Title::newFromText( 'BackupDumperTestP2', $ns );
  46                         $page = WikiPage::factory( $title );
  47                         list( $this->revId2_1, $this->textId2_1 ) = $this->addRevision( $page,
  48                                 "BackupDumperTestP2Text1", "BackupDumperTestP2Summary1" );
  49                         list( $this->revId2_2, $this->textId2_2 ) = $this->addRevision( $page,
  50                                 "BackupDumperTestP2Text2", "BackupDumperTestP2Summary2" );
  51                         list( $this->revId2_3, $this->textId2_3 ) = $this->addRevision( $page,
  52                                 "BackupDumperTestP2Text3", "BackupDumperTestP2Summary3" );
  53                         list( $this->revId2_4, $this->textId2_4 ) = $this->addRevision( $page,
  54                                 "BackupDumperTestP2Text4 some additional Text  ",
  55                                 "BackupDumperTestP2Summary4 extra " );
  56                         $this->pageId2 = $page->getId();
  57
  58                         // Deleted page.
  59                         $title = Title::newFromText( 'BackupDumperTestP3', $ns );
  60                         $page = WikiPage::factory( $title );
  61                         list( $this->revId3_1, $this->textId3_1 ) = $this->addRevision( $page,
  62                                 "BackupDumperTestP3Text1", "BackupDumperTestP2Summary1" );
  63                         list( $this->revId3_2, $this->textId3_2 ) = $this->addRevision( $page,
  64                                 "BackupDumperTestP3Text2", "BackupDumperTestP2Summary2" );
  65                         $this->pageId3 = $page->getId();
  66                         $page->doDeleteArticle( "Testing ;)" );
  67
  68                         // Page from non-default namespace and model.
  69                         // ExportTransform applies.
  70
  71                         if ( $ns === NS_TALK ) {
  72                                 // @todo work around this.
  73                                 throw new MWException( "The default wikitext namespace is the talk namespace. "
  74                                         . " We can't currently deal with that." );
  75                         }
  76
  77                         $title = Title::newFromText( 'BackupDumperTestP1', NS_TALK );
  78                         $page = WikiPage::factory( $title );
  79                         list( $this->revId4_1, $this->textId4_1 ) = $this->addRevision( $page,
  80                                 "Talk about BackupDumperTestP1 Text1",
  81                                 "Talk BackupDumperTestP1 Summary1",
  82                                 "BackupTextPassTestModel" );
  83                         $this->pageId4 = $page->getId();
  84                 } catch ( Exception $e ) {
  85                         // We'd love to pass $e directly. However, ... see
  86                         // documentation of exceptionFromAddDBData in
  87                         // DumpTestCase
  88                         $this->exceptionFromAddDBData = $e;
  89                 }
  90         }
  91
  92         protected function setUp() {
  93                 parent::setUp();
  94
  95                 // Since we will restrict dumping by page ranges (to allow
  96                 // working tests, even if the db gets prepopulated by a base
  97                 // class), we have to assert, that the page id are consecutively
  98                 // increasing
  99                 $this->assertEquals(
 100                         array( $this->pageId2, $this->pageId3, $this->pageId4 ),
 101                         array( $this->pageId1 + 1, $this->pageId2 + 1, $this->pageId3 + 1 ),
 102                         "Page ids increasing without holes" );
 103         }
 104
 105         function testPlain() {
 106                 // Setting up the dump
 107                 $nameStub = $this->setUpStub();
 108                 $nameFull = $this->getNewTempFile();
 109                 $dumper = new TextPassDumper( array( "--stub=file:" . $nameStub,
 110                         "--output=file:" . $nameFull ) );
 111                 $dumper->reporting = false;
 112                 $dumper->setDb( $this->db );
 113
 114                 // Performing the dump
 115                 $dumper->dump( WikiExporter::FULL, WikiExporter::TEXT );
 116
 117                 // Checking for correctness of the dumped data
 118                 $this->assertDumpStart( $nameFull );
 119
 120                 // Page 1
 121                 $this->assertPageStart( $this->pageId1, NS_MAIN, "BackupDumperTestP1" );
 122                 $this->assertRevision( $this->revId1_1, "BackupDumperTestP1Summary1",
 123                         $this->textId1_1, false, "0bolhl6ol7i6x0e7yq91gxgaan39j87",
 124                         "BackupDumperTestP1Text1" );
 125                 $this->assertPageEnd();
 126
 127                 // Page 2
 128                 $this->assertPageStart( $this->pageId2, NS_MAIN, "BackupDumperTestP2" );
 129                 $this->assertRevision( $this->revId2_1, "BackupDumperTestP2Summary1",
 130                         $this->textId2_1, false, "jprywrymfhysqllua29tj3sc7z39dl2",
 131                         "BackupDumperTestP2Text1" );
 132                 $this->assertRevision( $this->revId2_2, "BackupDumperTestP2Summary2",
 133                         $this->textId2_2, false, "b7vj5ks32po5m1z1t1br4o7scdwwy95",
 134                         "BackupDumperTestP2Text2", $this->revId2_1 );
 135                 $this->assertRevision( $this->revId2_3, "BackupDumperTestP2Summary3",
 136                         $this->textId2_3, false, "jfunqmh1ssfb8rs43r19w98k28gg56r",
 137                         "BackupDumperTestP2Text3", $this->revId2_2 );
 138                 $this->assertRevision( $this->revId2_4, "BackupDumperTestP2Summary4 extra",
 139                         $this->textId2_4, false, "6o1ciaxa6pybnqprmungwofc4lv00wv",
 140                         "BackupDumperTestP2Text4 some additional Text", $this->revId2_3 );
 141                 $this->assertPageEnd();
 142
 143                 // Page 3
 144                 // -> Page is marked deleted. Hence not visible
 145
 146                 // Page 4
 147                 $this->assertPageStart( $this->pageId4, NS_TALK, "Talk:BackupDumperTestP1" );
 148                 $this->assertRevision( $this->revId4_1, "Talk BackupDumperTestP1 Summary1",
 149                         $this->textId4_1, false, "nktofwzd0tl192k3zfepmlzxoax1lpe",
 150                         "TALK ABOUT BACKUPDUMPERTESTP1 TEXT1",
 151                         false,
 152                         "BackupTextPassTestModel",
 153                         "text/plain" );
 154                 $this->assertPageEnd();
 155
 156                 $this->assertDumpEnd();
 157         }
 158
 159         function testPrefetchPlain() {
 160                 // The mapping between ids and text, for the hits of the prefetch mock
 161                 $prefetchMap = array(
 162                         array( $this->pageId1, $this->revId1_1, "Prefetch_________1Text1" ),
 163                         array( $this->pageId2, $this->revId2_3, "Prefetch_________2Text3" )
 164                 );
 165
 166                 // The mock itself
 167                 $prefetchMock = $this->getMock( 'BaseDump', array( 'prefetch' ), array(), '', false );
 168                 $prefetchMock->expects( $this->exactly( 6 ) )
 169                         ->method( 'prefetch' )
 170                         ->will( $this->returnValueMap( $prefetchMap ) );
 171
 172                 // Setting up of the dump
 173                 $nameStub = $this->setUpStub();
 174                 $nameFull = $this->getNewTempFile();
 175                 $dumper = new TextPassDumper( array( "--stub=file:"
 176                         . $nameStub, "--output=file:" . $nameFull ) );
 177                 $dumper->prefetch = $prefetchMock;
 178                 $dumper->reporting = false;
 179                 $dumper->setDb( $this->db );
 180
 181                 // Performing the dump
 182                 $dumper->dump( WikiExporter::FULL, WikiExporter::TEXT );
 183
 184                 // Checking for correctness of the dumped data
 185                 $this->assertDumpStart( $nameFull );
 186
 187                 // Page 1
 188                 $this->assertPageStart( $this->pageId1, NS_MAIN, "BackupDumperTestP1" );
 189                 // Prefetch kicks in. This is still the SHA-1 of the original text,
 190                 // But the actual text (with different SHA-1) comes from prefetch.
 191                 $this->assertRevision( $this->revId1_1, "BackupDumperTestP1Summary1",
 192                         $this->textId1_1, false, "0bolhl6ol7i6x0e7yq91gxgaan39j87",
 193                         "Prefetch_________1Text1" );
 194                 $this->assertPageEnd();
 195
 196                 // Page 2
 197                 $this->assertPageStart( $this->pageId2, NS_MAIN, "BackupDumperTestP2" );
 198                 $this->assertRevision( $this->revId2_1, "BackupDumperTestP2Summary1",
 199                         $this->textId2_1, false, "jprywrymfhysqllua29tj3sc7z39dl2",
 200                         "BackupDumperTestP2Text1" );
 201                 $this->assertRevision( $this->revId2_2, "BackupDumperTestP2Summary2",
 202                         $this->textId2_2, false, "b7vj5ks32po5m1z1t1br4o7scdwwy95",
 203                         "BackupDumperTestP2Text2", $this->revId2_1 );
 204                 // Prefetch kicks in. This is still the SHA-1 of the original text,
 205                 // But the actual text (with different SHA-1) comes from prefetch.
 206                 $this->assertRevision( $this->revId2_3, "BackupDumperTestP2Summary3",
 207                         $this->textId2_3, false, "jfunqmh1ssfb8rs43r19w98k28gg56r",
 208                         "Prefetch_________2Text3", $this->revId2_2 );
 209                 $this->assertRevision( $this->revId2_4, "BackupDumperTestP2Summary4 extra",
 210                         $this->textId2_4, false, "6o1ciaxa6pybnqprmungwofc4lv00wv",
 211                         "BackupDumperTestP2Text4 some additional Text", $this->revId2_3 );
 212                 $this->assertPageEnd();
 213
 214                 // Page 3
 215                 // -> Page is marked deleted. Hence not visible
 216
 217                 // Page 4
 218                 $this->assertPageStart( $this->pageId4, NS_TALK, "Talk:BackupDumperTestP1" );
 219                 $this->assertRevision( $this->revId4_1, "Talk BackupDumperTestP1 Summary1",
 220                         $this->textId4_1, false, "nktofwzd0tl192k3zfepmlzxoax1lpe",
 221                         "TALK ABOUT BACKUPDUMPERTESTP1 TEXT1",
 222                         false,
 223                         "BackupTextPassTestModel",
 224                         "text/plain" );
 225                 $this->assertPageEnd();
 226
 227                 $this->assertDumpEnd();
 228         }
 229
 230         /**
 231          * Ensures that checkpoint dumps are used and written, by successively increasing the
 232          * stub size and dumping until the duration crosses a threshold.
 233          *
 234          * @param string $checkpointFormat Either "file" for plain text or "gzip" for gzipped
 235          *   checkpoint files.
 236          */
 237         private function checkpointHelper( $checkpointFormat = "file" ) {
 238                 // Getting temporary names
 239                 $nameStub = $this->getNewTempFile();
 240                 $nameOutputDir = $this->getNewTempDirectory();
 241
 242                 $stderr = fopen( 'php://output', 'a' );
 243                 if ( $stderr === false ) {
 244                         $this->fail( "Could not open stream for stderr" );
 245                 }
 246
 247                 $iterations = 32; // We'll start with that many iterations of revisions
 248                 // in stub. Make sure that the generated volume is above the buffer size
 249                 // set below. Otherwise, the checkpointing does not trigger.
 250                 $lastDuration = 0;
 251                 $minDuration = 2; // We want the dump to take at least this many seconds
 252                 $checkpointAfter = 0.5; // Generate checkpoint after this many seconds
 253
 254                 // Until a dump takes at least $minDuration seconds, perform a dump and check
 255                 // duration. If the dump did not take long enough increase the iteration
 256                 // count, to generate a bigger stub file next time.
 257                 while ( $lastDuration < $minDuration ) {
 258
 259                         // Setting up the dump
 260                         wfRecursiveRemoveDir( $nameOutputDir );
 261                         $this->assertTrue( wfMkdirParents( $nameOutputDir ),
 262                                 "Creating temporary output directory " );
 263                         $this->setUpStub( $nameStub, $iterations );
 264                         $dumper = new TextPassDumper( array( "--stub=file:" . $nameStub,
 265                                 "--output=" . $checkpointFormat . ":" . $nameOutputDir . "/full",
 266                                 "--maxtime=1" /*This is in minutes. Fixup is below*/,
 267                                 "--buffersize=32768", // The default of 32 iterations fill up 32KB about twice
 268                                 "--checkpointfile=checkpoint-%s-%s.xml.gz" ) );
 269                         $dumper->setDb( $this->db );
 270                         $dumper->maxTimeAllowed = $checkpointAfter; // Patching maxTime from 1 minute
 271                         $dumper->stderr = $stderr;
 272
 273                         // The actual dump and taking time
 274                         $ts_before = microtime( true );
 275                         $dumper->dump( WikiExporter::FULL, WikiExporter::TEXT );
 276                         $ts_after = microtime( true );
 277                         $lastDuration = $ts_after - $ts_before;
 278
 279                         // Handling increasing the iteration count for the stubs
 280                         if ( $lastDuration < $minDuration ) {
 281                                 $old_iterations = $iterations;
 282                                 if ( $lastDuration > 0.2 ) {
 283                                         // lastDuration is big enough, to allow an educated guess
 284                                         $factor = ( $minDuration + 0.5 ) / $lastDuration;
 285                                         if ( ( $factor > 1.1 ) && ( $factor < 100 ) ) {
 286                                                 // educated guess is reasonable
 287                                                 $iterations = (int)( $iterations * $factor );
 288                                         }
 289                                 }
 290
 291                                 if ( $old_iterations == $iterations ) {
 292                                         // Heuristics were not applied, so we just *2.
 293                                         $iterations *= 2;
 294                                 }
 295
 296                                 $this->assertLessThan( 50000, $iterations,
 297                                         "Emergency stop against infinitely increasing iteration "
 298                                                 . "count ( last duration: $lastDuration )" );
 299                         }
 300                 }
 301
 302                 // The dump (hopefully) did take long enough to produce more than one
 303                 // checkpoint file.
 304                 //
 305                 // We now check all the checkpoint files for validity.
 306
 307                 $files = scandir( $nameOutputDir );
 308                 $this->assertTrue( asort( $files ), "Sorting files in temporary directory" );
 309                 $fileOpened = false;
 310                 $lookingForPage = 1;
 311                 $checkpointFiles = 0;
 312
 313                 // Each run of the following loop body tries to handle exactly 1 /page/ (not
 314                 // iteration of stub content). $i is only increased after having treated page 4.
 315                 for ( $i = 0; $i < $iterations; ) {
 316
 317                         // 1. Assuring a file is opened and ready. Skipping across header if
 318                         //    necessary.
 319                         if ( !$fileOpened ) {
 320                                 $this->assertNotEmpty( $files, "No more existing dump files, "
 321                                         . "but not yet all pages found" );
 322                                 $fname = array_shift( $files );
 323                                 while ( $fname == "." || $fname == ".." ) {
 324                                         $this->assertNotEmpty( $files, "No more existing dump"
 325                                                 . " files, but not yet all pages found" );
 326                                         $fname = array_shift( $files );
 327                                 }
 328                                 if ( $checkpointFormat == "gzip" ) {
 329                                         $this->gunzip( $nameOutputDir . "/" . $fname );
 330                                 }
 331                                 $this->assertDumpStart( $nameOutputDir . "/" . $fname );
 332                                 $fileOpened = true;
 333                                 $checkpointFiles++;
 334                         }
 335
 336                         // 2. Performing a single page check
 337                         switch ( $lookingForPage ) {
 338                                 case 1:
 339                                         // Page 1
 340                                         $this->assertPageStart( $this->pageId1 + $i * self::$numOfPages, NS_MAIN,
 341                                                 "BackupDumperTestP1" );
 342                                         $this->assertRevision( $this->revId1_1 + $i * self::$numOfRevs, "BackupDumperTestP1Summary1",
 343                                                 $this->textId1_1, false, "0bolhl6ol7i6x0e7yq91gxgaan39j87",
 344                                                 "BackupDumperTestP1Text1" );
 345                                         $this->assertPageEnd();
 346
 347                                         $lookingForPage = 2;
 348                                         break;
 349
 350                                 case 2:
 351                                         // Page 2
 352                                         $this->assertPageStart( $this->pageId2 + $i * self::$numOfPages, NS_MAIN,
 353                                                 "BackupDumperTestP2" );
 354                                         $this->assertRevision( $this->revId2_1 + $i * self::$numOfRevs, "BackupDumperTestP2Summary1",
 355                                                 $this->textId2_1, false, "jprywrymfhysqllua29tj3sc7z39dl2",
 356                                                 "BackupDumperTestP2Text1" );
 357                                         $this->assertRevision( $this->revId2_2 + $i * self::$numOfRevs, "BackupDumperTestP2Summary2",
 358                                                 $this->textId2_2, false, "b7vj5ks32po5m1z1t1br4o7scdwwy95",
 359                                                 "BackupDumperTestP2Text2", $this->revId2_1 + $i * self::$numOfRevs );
 360                                         $this->assertRevision( $this->revId2_3 + $i * self::$numOfRevs, "BackupDumperTestP2Summary3",
 361                                                 $this->textId2_3, false, "jfunqmh1ssfb8rs43r19w98k28gg56r",
 362                                                 "BackupDumperTestP2Text3", $this->revId2_2 + $i * self::$numOfRevs );
 363                                         $this->assertRevision( $this->revId2_4 + $i * self::$numOfRevs,
 364                                                 "BackupDumperTestP2Summary4 extra",
 365                                                 $this->textId2_4, false, "6o1ciaxa6pybnqprmungwofc4lv00wv",
 366                                                 "BackupDumperTestP2Text4 some additional Text",
 367                                                 $this->revId2_3 + $i * self::$numOfRevs );
 368                                         $this->assertPageEnd();
 369
 370                                         $lookingForPage = 4;
 371                                         break;
 372
 373                                 case 4:
 374                                         // Page 4
 375                                         $this->assertPageStart( $this->pageId4 + $i * self::$numOfPages, NS_TALK,
 376                                                 "Talk:BackupDumperTestP1" );
 377                                         $this->assertRevision( $this->revId4_1 + $i * self::$numOfRevs,
 378                                                 "Talk BackupDumperTestP1 Summary1",
 379                                                 $this->textId4_1, false, "nktofwzd0tl192k3zfepmlzxoax1lpe",
 380                                                 "TALK ABOUT BACKUPDUMPERTESTP1 TEXT1",
 381                                                 false,
 382                                                 "BackupTextPassTestModel",
 383                                                 "text/plain" );
 384                                         $this->assertPageEnd();
 385
 386                                         $lookingForPage = 1;
 387
 388                                         // We dealt with the whole iteration.
 389                                         $i++;
 390                                         break;
 391
 392                                 default:
 393                                         $this->fail( "Bad setting for lookingForPage ($lookingForPage)" );
 394                         }
 395
 396                         // 3. Checking for the end of the current checkpoint file
 397                         if ( $this->xml->nodeType == XMLReader::END_ELEMENT
 398                                 && $this->xml->name == "mediawiki"
 399                         ) {
 400                                 $this->assertDumpEnd();
 401                                 $fileOpened = false;
 402                         }
 403                 }
 404
 405                 // Assuring we completely read all files ...
 406                 $this->assertFalse( $fileOpened, "Currently read file still open?" );
 407                 $this->assertEmpty( $files, "Remaining unchecked files" );
 408
 409                 // ... and have dealt with more than one checkpoint file
 410                 $this->assertGreaterThan(
 411                         1,
 412                         $checkpointFiles,
 413                         "expected more than 1 checkpoint to have been created. "
 414                                 . "Checkpoint interval is $checkpointAfter seconds, maybe your computer is too fast?"
 415                 );
 416
 417                 $this->expectETAOutput();
 418         }
 419
 420         /**
 421          * @group large
 422          */
 423         function testCheckpointPlain() {
 424                 $this->checkpointHelper();
 425         }
 426
 427         /**
 428          * tests for working checkpoint generation in gzip format work.
 429          *
 430          * We keep this test in addition to the simpler self::testCheckpointPlain, as there
 431          * were once problems when the used sinks were DumpPipeOutputs.
 432          *
 433          * xmldumps-backup typically uses bzip2 instead of gzip. However, as bzip2 requires
 434          * PHP extensions, we go for gzip instead, which triggers the same relevant code
 435          * paths while still being testable on more systems.
 436          *
 437          * @group large
 438          */
 439         function testCheckpointGzip() {
 440                 $this->checkHasGzip();
 441                 $this->checkpointHelper( "gzip" );
 442         }
 443
 444         /**
 445          * Creates a stub file that is used for testing the text pass of dumps
 446          *
 447          * @param string $fname (Optional) Absolute name of the file to write
 448          *   the stub into. If this parameter is null, a new temporary
 449          *   file is generated that is automatically removed upon tearDown.
 450          * @param int $iterations (Optional) specifies how often the block
 451          *   of 3 pages should go into the stub file. The page and
 452          *   revision id increase further and further, while the text
 453          *   id of the first iteration is reused. The pages and revision
 454          *   of iteration > 1 have no corresponding representation in the database.
 455          * @return string Absolute filename of the stub
 456          */
 457         private function setUpStub( $fname = null, $iterations = 1 ) {
 458                 if ( $fname === null ) {
 459                         $fname = $this->getNewTempFile();
 460                 }
 461                 $header = '<mediawiki xmlns="http://www.mediawiki.org/xml/export-0.10/" '
 462                         . 'xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" '
 463                         . 'xsi:schemaLocation="http://www.mediawiki.org/xml/export-0.10/ '
 464                         . 'http://www.mediawiki.org/xml/export-0.10.xsd" version="0.10" xml:lang="en">
 465   <siteinfo>
 466     <sitename>wikisvn</sitename>
 467     <base>http://localhost/wiki-svn/index.php/Main_Page</base>
 468     <generator>MediaWiki 1.21alpha</generator>
 469     <case>first-letter</case>
 470     <namespaces>
 471       <namespace key="-2" case="first-letter">Media</namespace>
 472       <namespace key="-1" case="first-letter">Special</namespace>
 473       <namespace key="0" case="first-letter" />
 474       <namespace key="1" case="first-letter">Talk</namespace>
 475       <namespace key="2" case="first-letter">User</namespace>
 476       <namespace key="3" case="first-letter">User talk</namespace>
 477       <namespace key="4" case="first-letter">Wikisvn</namespace>
 478       <namespace key="5" case="first-letter">Wikisvn talk</namespace>
 479       <namespace key="6" case="first-letter">File</namespace>
 480       <namespace key="7" case="first-letter">File talk</namespace>
 481       <namespace key="8" case="first-letter">MediaWiki</namespace>
 482       <namespace key="9" case="first-letter">MediaWiki talk</namespace>
 483       <namespace key="10" case="first-letter">Template</namespace>
 484       <namespace key="11" case="first-letter">Template talk</namespace>
 485       <namespace key="12" case="first-letter">Help</namespace>
 486       <namespace key="13" case="first-letter">Help talk</namespace>
 487       <namespace key="14" case="first-letter">Category</namespace>
 488       <namespace key="15" case="first-letter">Category talk</namespace>
 489     </namespaces>
 490   </siteinfo>
 491 ';
 492                 $tail = '</mediawiki>
 493 ';
 494
 495                 $content = $header;
 496                 $iterations = intval( $iterations );
 497                 for ( $i = 0; $i < $iterations; $i++ ) {
 498
 499                         $page1 = '  <page>
 500     <title>BackupDumperTestP1</title>
 501     <ns>0</ns>
 502     <id>' . ( $this->pageId1 + $i * self::$numOfPages ) . '</id>
 503     <revision>
 504       <id>' . ( $this->revId1_1 + $i * self::$numOfRevs ) . '</id>
 505       <timestamp>2012-04-01T16:46:05Z</timestamp>
 506       <contributor>
 507         <ip>127.0.0.1</ip>
 508       </contributor>
 509       <comment>BackupDumperTestP1Summary1</comment>
 510       <model>wikitext</model>
 511       <format>text/x-wiki</format>
 512       <text id="' . $this->textId1_1 . '" bytes="23" />
 513       <sha1>0bolhl6ol7i6x0e7yq91gxgaan39j87</sha1>
 514     </revision>
 515   </page>
 516 ';
 517                         $page2 = '  <page>
 518     <title>BackupDumperTestP2</title>
 519     <ns>0</ns>
 520     <id>' . ( $this->pageId2 + $i * self::$numOfPages ) . '</id>
 521     <revision>
 522       <id>' . ( $this->revId2_1 + $i * self::$numOfRevs ) . '</id>
 523       <timestamp>2012-04-01T16:46:05Z</timestamp>
 524       <contributor>
 525         <ip>127.0.0.1</ip>
 526       </contributor>
 527       <comment>BackupDumperTestP2Summary1</comment>
 528       <model>wikitext</model>
 529       <format>text/x-wiki</format>
 530       <text id="' . $this->textId2_1 . '" bytes="23" />
 531       <sha1>jprywrymfhysqllua29tj3sc7z39dl2</sha1>
 532     </revision>
 533     <revision>
 534       <id>' . ( $this->revId2_2 + $i * self::$numOfRevs ) . '</id>
 535       <parentid>' . ( $this->revId2_1 + $i * self::$numOfRevs ) . '</parentid>
 536       <timestamp>2012-04-01T16:46:05Z</timestamp>
 537       <contributor>
 538         <ip>127.0.0.1</ip>
 539       </contributor>
 540       <comment>BackupDumperTestP2Summary2</comment>
 541       <model>wikitext</model>
 542       <format>text/x-wiki</format>
 543       <text id="' . $this->textId2_2 . '" bytes="23" />
 544       <sha1>b7vj5ks32po5m1z1t1br4o7scdwwy95</sha1>
 545     </revision>
 546     <revision>
 547       <id>' . ( $this->revId2_3 + $i * self::$numOfRevs ) . '</id>
 548       <parentid>' . ( $this->revId2_2 + $i * self::$numOfRevs ) . '</parentid>
 549       <timestamp>2012-04-01T16:46:05Z</timestamp>
 550       <contributor>
 551         <ip>127.0.0.1</ip>
 552       </contributor>
 553       <comment>BackupDumperTestP2Summary3</comment>
 554       <model>wikitext</model>
 555       <format>text/x-wiki</format>
 556       <text id="' . $this->textId2_3 . '" bytes="23" />
 557       <sha1>jfunqmh1ssfb8rs43r19w98k28gg56r</sha1>
 558     </revision>
 559     <revision>
 560       <id>' . ( $this->revId2_4 + $i * self::$numOfRevs ) . '</id>
 561       <parentid>' . ( $this->revId2_3 + $i * self::$numOfRevs ) . '</parentid>
 562       <timestamp>2012-04-01T16:46:05Z</timestamp>
 563       <contributor>
 564         <ip>127.0.0.1</ip>
 565       </contributor>
 566       <comment>BackupDumperTestP2Summary4 extra</comment>
 567       <model>wikitext</model>
 568       <format>text/x-wiki</format>
 569       <text id="' . $this->textId2_4 . '" bytes="44" />
 570       <sha1>6o1ciaxa6pybnqprmungwofc4lv00wv</sha1>
 571     </revision>
 572   </page>
 573 ';
 574                         // page 3 not in stub
 575
 576                         $page4 = '  <page>
 577     <title>Talk:BackupDumperTestP1</title>
 578     <ns>1</ns>
 579     <id>' . ( $this->pageId4 + $i * self::$numOfPages ) . '</id>
 580     <revision>
 581       <id>' . ( $this->revId4_1 + $i * self::$numOfRevs ) . '</id>
 582       <timestamp>2012-04-01T16:46:05Z</timestamp>
 583       <contributor>
 584         <ip>127.0.0.1</ip>
 585       </contributor>
 586       <comment>Talk BackupDumperTestP1 Summary1</comment>
 587       <model>BackupTextPassTestModel</model>
 588       <format>text/plain</format>
 589       <text id="' . $this->textId4_1 . '" bytes="35" />
 590       <sha1>nktofwzd0tl192k3zfepmlzxoax1lpe</sha1>
 591     </revision>
 592   </page>
 593 ';
 594                         $content .= $page1 . $page2 . $page4;
 595                 }
 596                 $content .= $tail;
 597                 $this->assertEquals( strlen( $content ), file_put_contents(
 598                         $fname, $content ), "Length of prepared stub" );
 599
 600                 return $fname;
 601         }
 602 }
 603
 604 class BackupTextPassTestModelHandler extends TextContentHandler {
 605
 606         public function __construct() {
 607                 parent::__construct( 'BackupTextPassTestModel' );
 608         }
 609
 610         public function exportTransform( $text, $format = null ) {
 611                 return strtoupper( $text );
 612         }
 613
 614 }
 615
 616 /**
 617  * Tests for TextPassDumper that do not rely on the database
 618  *
 619  * (As the Database group is only detected at class level (not method level), we
 620  * cannot bring this test case's tests into the above main test case.)
 621  *
 622  * @group Dump
 623  * @covers TextPassDumper
 624  */
 625 class TextPassDumperDatabaselessTest extends MediaWikiLangTestCase {
 626         /**
 627          * Ensures that setting the buffer size is effective.
 628          *
 629          * @dataProvider bufferSizeProvider
 630          */
 631         function testBufferSizeSetting( $expected, $size, $msg ) {
 632                 $dumper = new TextPassDumperAccessor( array( "--buffersize=" . $size ) );
 633                 $this->assertEquals( $expected, $dumper->getBufferSize(), $msg);
 634         }
 635
 636         /**
 637          * Ensures that setting the buffer size is effective.
 638          *
 639          * @dataProvider bufferSizeProvider
 640          */
 641         function bufferSizeProvider() {
 642                 // expected, bufferSize to initialize with, message
 643                 return array(
 644                         array( 512 * 1024, 512 * 1024, "Setting 512KB is not effective" ),
 645                         array( 8192, 8192, "Setting 8KB is not effective" ),
 646                         array( 4096, 2048, "Could set buffer size below lower bound" )
 647                 );
 648         }
 649 }
 650
 651 /**
 652  * Accessor for internal state of TextPassDumper
 653  *
 654  * Do not warrentless add getters here.
 655  */
 656 class TextPassDumperAccessor extends TextPassDumper {
 657         /**
 658          * Gets the bufferSize.
 659          *
 660          * If bufferSize setting does not work correctly, testCheckpoint... tests
 661          * fail and point in the wrong direction. To aid in troubleshooting when
 662          * testCheckpoint... tests break at some point in the future, we test the
 663          * bufferSize setting, hence need this accessor.
 664          *
 665          * (Yes, bufferSize is internal state of the TextPassDumper, but aiding
 666          * debugging of testCheckpoint... in the future seems to be worth testing
 667          * against it nonetheless.)
 668          */
 669         public function getBufferSize() {
 670                 return $this->bufferSize;
 671         }
 672 }