tests/phpunit/maintenance/backupTextPassTest.php

   1 <?php
   2
   3 require_once __DIR__ . "/../../../maintenance/dumpTextPass.php";
   4
   5 /**
   6  * Tests for TextPassDumper that rely on the database
   7  *
   8  * Some of these tests use the old constuctor for TextPassDumper
   9  * and the dump() function, while others use the new loadWithArgv( $args )
  10  * function and execute(). This is to ensure both the old and new methods
  11  * work properly.
  12  *
  13  * @group Database
  14  * @group Dump
  15  * @covers TextPassDumper
  16  */
  17 class TextPassDumperDatabaseTest extends DumpTestCase {
  18
  19         // We'll add several pages, revision and texts. The following variables hold the
  20         // corresponding ids.
  21         private $pageId1, $pageId2, $pageId3, $pageId4;
  22         private static $numOfPages = 4;
  23         private $revId1_1, $textId1_1;
  24         private $revId2_1, $textId2_1, $revId2_2, $textId2_2;
  25         private $revId2_3, $textId2_3, $revId2_4, $textId2_4;
  26         private $revId3_1, $textId3_1, $revId3_2, $textId3_2;
  27         private $revId4_1, $textId4_1;
  28         private static $numOfRevs = 8;
  29
  30         function addDBData() {
  31                 $this->tablesUsed[] = 'page';
  32                 $this->tablesUsed[] = 'revision';
  33                 $this->tablesUsed[] = 'text';
  34
  35                 $this->mergeMwGlobalArrayValue( 'wgContentHandlers', [
  36                         "BackupTextPassTestModel" => "BackupTextPassTestModelHandler"
  37                 ] );
  38
  39                 $ns = $this->getDefaultWikitextNS();
  40
  41                 try {
  42                         // Simple page
  43                         $title = Title::newFromText( 'BackupDumperTestP1', $ns );
  44                         $page = WikiPage::factory( $title );
  45                         list( $this->revId1_1, $this->textId1_1 ) = $this->addRevision( $page,
  46                                 "BackupDumperTestP1Text1", "BackupDumperTestP1Summary1" );
  47                         $this->pageId1 = $page->getId();
  48
  49                         // Page with more than one revision
  50                         $title = Title::newFromText( 'BackupDumperTestP2', $ns );
  51                         $page = WikiPage::factory( $title );
  52                         list( $this->revId2_1, $this->textId2_1 ) = $this->addRevision( $page,
  53                                 "BackupDumperTestP2Text1", "BackupDumperTestP2Summary1" );
  54                         list( $this->revId2_2, $this->textId2_2 ) = $this->addRevision( $page,
  55                                 "BackupDumperTestP2Text2", "BackupDumperTestP2Summary2" );
  56                         list( $this->revId2_3, $this->textId2_3 ) = $this->addRevision( $page,
  57                                 "BackupDumperTestP2Text3", "BackupDumperTestP2Summary3" );
  58                         list( $this->revId2_4, $this->textId2_4 ) = $this->addRevision( $page,
  59                                 "BackupDumperTestP2Text4 some additional Text  ",
  60                                 "BackupDumperTestP2Summary4 extra " );
  61                         $this->pageId2 = $page->getId();
  62
  63                         // Deleted page.
  64                         $title = Title::newFromText( 'BackupDumperTestP3', $ns );
  65                         $page = WikiPage::factory( $title );
  66                         list( $this->revId3_1, $this->textId3_1 ) = $this->addRevision( $page,
  67                                 "BackupDumperTestP3Text1", "BackupDumperTestP2Summary1" );
  68                         list( $this->revId3_2, $this->textId3_2 ) = $this->addRevision( $page,
  69                                 "BackupDumperTestP3Text2", "BackupDumperTestP2Summary2" );
  70                         $this->pageId3 = $page->getId();
  71                         $page->doDeleteArticle( "Testing ;)" );
  72
  73                         // Page from non-default namespace and model.
  74                         // ExportTransform applies.
  75
  76                         if ( $ns === NS_TALK ) {
  77                                 // @todo work around this.
  78                                 throw new MWException( "The default wikitext namespace is the talk namespace. "
  79                                         . " We can't currently deal with that." );
  80                         }
  81
  82                         $title = Title::newFromText( 'BackupDumperTestP1', NS_TALK );
  83                         $page = WikiPage::factory( $title );
  84                         list( $this->revId4_1, $this->textId4_1 ) = $this->addRevision( $page,
  85                                 "Talk about BackupDumperTestP1 Text1",
  86                                 "Talk BackupDumperTestP1 Summary1",
  87                                 "BackupTextPassTestModel" );
  88                         $this->pageId4 = $page->getId();
  89                 } catch ( Exception $e ) {
  90                         // We'd love to pass $e directly. However, ... see
  91                         // documentation of exceptionFromAddDBData in
  92                         // DumpTestCase
  93                         $this->exceptionFromAddDBData = $e;
  94                 }
  95         }
  96
  97         protected function setUp() {
  98                 parent::setUp();
  99
 100                 // Since we will restrict dumping by page ranges (to allow
 101                 // working tests, even if the db gets prepopulated by a base
 102                 // class), we have to assert, that the page id are consecutively
 103                 // increasing
 104                 $this->assertEquals(
 105                         [ $this->pageId2, $this->pageId3, $this->pageId4 ],
 106                         [ $this->pageId1 + 1, $this->pageId1 + 2, $this->pageId1 + 3 ],
 107                         "Page ids increasing without holes" );
 108         }
 109
 110         function testPlain() {
 111                 // Setting up the dump
 112                 $nameStub = $this->setUpStub();
 113                 $nameFull = $this->getNewTempFile();
 114                 $dumper = new TextPassDumper( [ "--stub=file:" . $nameStub,
 115                         "--output=file:" . $nameFull ] );
 116                 $dumper->reporting = false;
 117                 $dumper->setDB( $this->db );
 118
 119                 // Performing the dump
 120                 $dumper->dump( WikiExporter::FULL, WikiExporter::TEXT );
 121
 122                 // Checking for correctness of the dumped data
 123                 $this->assertDumpStart( $nameFull );
 124
 125                 // Page 1
 126                 $this->assertPageStart( $this->pageId1, NS_MAIN, "BackupDumperTestP1" );
 127                 $this->assertRevision( $this->revId1_1, "BackupDumperTestP1Summary1",
 128                         $this->textId1_1, false, "0bolhl6ol7i6x0e7yq91gxgaan39j87",
 129                         "BackupDumperTestP1Text1" );
 130                 $this->assertPageEnd();
 131
 132                 // Page 2
 133                 $this->assertPageStart( $this->pageId2, NS_MAIN, "BackupDumperTestP2" );
 134                 $this->assertRevision( $this->revId2_1, "BackupDumperTestP2Summary1",
 135                         $this->textId2_1, false, "jprywrymfhysqllua29tj3sc7z39dl2",
 136                         "BackupDumperTestP2Text1" );
 137                 $this->assertRevision( $this->revId2_2, "BackupDumperTestP2Summary2",
 138                         $this->textId2_2, false, "b7vj5ks32po5m1z1t1br4o7scdwwy95",
 139                         "BackupDumperTestP2Text2", $this->revId2_1 );
 140                 $this->assertRevision( $this->revId2_3, "BackupDumperTestP2Summary3",
 141                         $this->textId2_3, false, "jfunqmh1ssfb8rs43r19w98k28gg56r",
 142                         "BackupDumperTestP2Text3", $this->revId2_2 );
 143                 $this->assertRevision( $this->revId2_4, "BackupDumperTestP2Summary4 extra",
 144                         $this->textId2_4, false, "6o1ciaxa6pybnqprmungwofc4lv00wv",
 145                         "BackupDumperTestP2Text4 some additional Text", $this->revId2_3 );
 146                 $this->assertPageEnd();
 147
 148                 // Page 3
 149                 // -> Page is marked deleted. Hence not visible
 150
 151                 // Page 4
 152                 $this->assertPageStart( $this->pageId4, NS_TALK, "Talk:BackupDumperTestP1" );
 153                 $this->assertRevision( $this->revId4_1, "Talk BackupDumperTestP1 Summary1",
 154                         $this->textId4_1, false, "nktofwzd0tl192k3zfepmlzxoax1lpe",
 155                         "TALK ABOUT BACKUPDUMPERTESTP1 TEXT1",
 156                         false,
 157                         "BackupTextPassTestModel",
 158                         "text/plain" );
 159                 $this->assertPageEnd();
 160
 161                 $this->assertDumpEnd();
 162         }
 163
 164         function testPrefetchPlain() {
 165                 // The mapping between ids and text, for the hits of the prefetch mock
 166                 $prefetchMap = [
 167                         [ $this->pageId1, $this->revId1_1, "Prefetch_________1Text1" ],
 168                         [ $this->pageId2, $this->revId2_3, "Prefetch_________2Text3" ]
 169                 ];
 170
 171                 // The mock itself
 172                 $prefetchMock = $this->getMockBuilder( 'BaseDump' )
 173                         ->setMethods( [ 'prefetch' ] )
 174                         ->disableOriginalConstructor()
 175                         ->getMock();
 176                 $prefetchMock->expects( $this->exactly( 6 ) )
 177                         ->method( 'prefetch' )
 178                         ->will( $this->returnValueMap( $prefetchMap ) );
 179
 180                 // Setting up of the dump
 181                 $nameStub = $this->setUpStub();
 182                 $nameFull = $this->getNewTempFile();
 183
 184                 $dumper = new TextPassDumper( [ "--stub=file:" . $nameStub,
 185                         "--output=file:" . $nameFull ] );
 186
 187                 $dumper->prefetch = $prefetchMock;
 188                 $dumper->reporting = false;
 189                 $dumper->setDB( $this->db );
 190
 191                 // Performing the dump
 192                 $dumper->dump( WikiExporter::FULL, WikiExporter::TEXT );
 193
 194                 // Checking for correctness of the dumped data
 195                 $this->assertDumpStart( $nameFull );
 196
 197                 // Page 1
 198                 $this->assertPageStart( $this->pageId1, NS_MAIN, "BackupDumperTestP1" );
 199                 // Prefetch kicks in. This is still the SHA-1 of the original text,
 200                 // But the actual text (with different SHA-1) comes from prefetch.
 201                 $this->assertRevision( $this->revId1_1, "BackupDumperTestP1Summary1",
 202                         $this->textId1_1, false, "0bolhl6ol7i6x0e7yq91gxgaan39j87",
 203                         "Prefetch_________1Text1" );
 204                 $this->assertPageEnd();
 205
 206                 // Page 2
 207                 $this->assertPageStart( $this->pageId2, NS_MAIN, "BackupDumperTestP2" );
 208                 $this->assertRevision( $this->revId2_1, "BackupDumperTestP2Summary1",
 209                         $this->textId2_1, false, "jprywrymfhysqllua29tj3sc7z39dl2",
 210                         "BackupDumperTestP2Text1" );
 211                 $this->assertRevision( $this->revId2_2, "BackupDumperTestP2Summary2",
 212                         $this->textId2_2, false, "b7vj5ks32po5m1z1t1br4o7scdwwy95",
 213                         "BackupDumperTestP2Text2", $this->revId2_1 );
 214                 // Prefetch kicks in. This is still the SHA-1 of the original text,
 215                 // But the actual text (with different SHA-1) comes from prefetch.
 216                 $this->assertRevision( $this->revId2_3, "BackupDumperTestP2Summary3",
 217                         $this->textId2_3, false, "jfunqmh1ssfb8rs43r19w98k28gg56r",
 218                         "Prefetch_________2Text3", $this->revId2_2 );
 219                 $this->assertRevision( $this->revId2_4, "BackupDumperTestP2Summary4 extra",
 220                         $this->textId2_4, false, "6o1ciaxa6pybnqprmungwofc4lv00wv",
 221                         "BackupDumperTestP2Text4 some additional Text", $this->revId2_3 );
 222                 $this->assertPageEnd();
 223
 224                 // Page 3
 225                 // -> Page is marked deleted. Hence not visible
 226
 227                 // Page 4
 228                 $this->assertPageStart( $this->pageId4, NS_TALK, "Talk:BackupDumperTestP1" );
 229                 $this->assertRevision( $this->revId4_1, "Talk BackupDumperTestP1 Summary1",
 230                         $this->textId4_1, false, "nktofwzd0tl192k3zfepmlzxoax1lpe",
 231                         "TALK ABOUT BACKUPDUMPERTESTP1 TEXT1",
 232                         false,
 233                         "BackupTextPassTestModel",
 234                         "text/plain" );
 235                 $this->assertPageEnd();
 236
 237                 $this->assertDumpEnd();
 238         }
 239
 240         /**
 241          * Ensures that checkpoint dumps are used and written, by successively increasing the
 242          * stub size and dumping until the duration crosses a threshold.
 243          *
 244          * @param string $checkpointFormat Either "file" for plain text or "gzip" for gzipped
 245          *   checkpoint files.
 246          */
 247         private function checkpointHelper( $checkpointFormat = "file" ) {
 248                 // Getting temporary names
 249                 $nameStub = $this->getNewTempFile();
 250                 $nameOutputDir = $this->getNewTempDirectory();
 251
 252                 $stderr = fopen( 'php://output', 'a' );
 253                 if ( $stderr === false ) {
 254                         $this->fail( "Could not open stream for stderr" );
 255                 }
 256
 257                 $iterations = 32; // We'll start with that many iterations of revisions
 258                 // in stub. Make sure that the generated volume is above the buffer size
 259                 // set below. Otherwise, the checkpointing does not trigger.
 260                 $lastDuration = 0;
 261                 $minDuration = 2; // We want the dump to take at least this many seconds
 262                 $checkpointAfter = 0.5; // Generate checkpoint after this many seconds
 263
 264                 // Until a dump takes at least $minDuration seconds, perform a dump and check
 265                 // duration. If the dump did not take long enough increase the iteration
 266                 // count, to generate a bigger stub file next time.
 267                 while ( $lastDuration < $minDuration ) {
 268                         // Setting up the dump
 269                         wfRecursiveRemoveDir( $nameOutputDir );
 270                         $this->assertTrue( wfMkdirParents( $nameOutputDir ),
 271                                 "Creating temporary output directory " );
 272                         $this->setUpStub( $nameStub, $iterations );
 273                         $dumper = new TextPassDumper();
 274                         $dumper->loadWithArgv( [ "--stub=file:" . $nameStub,
 275                                 "--output=" . $checkpointFormat . ":" . $nameOutputDir . "/full",
 276                                 "--maxtime=1" /*This is in minutes. Fixup is below*/,
 277                                 "--buffersize=32768", // The default of 32 iterations fill up 32KB about twice
 278                                 "--checkpointfile=checkpoint-%s-%s.xml.gz" ] );
 279                         $dumper->setDB( $this->db );
 280                         $dumper->maxTimeAllowed = $checkpointAfter; // Patching maxTime from 1 minute
 281                         $dumper->stderr = $stderr;
 282
 283                         // The actual dump and taking time
 284                         $ts_before = microtime( true );
 285                         $dumper->execute();
 286                         $ts_after = microtime( true );
 287                         $lastDuration = $ts_after - $ts_before;
 288
 289                         // Handling increasing the iteration count for the stubs
 290                         if ( $lastDuration < $minDuration ) {
 291                                 $old_iterations = $iterations;
 292                                 if ( $lastDuration > 0.2 ) {
 293                                         // lastDuration is big enough, to allow an educated guess
 294                                         $factor = ( $minDuration + 0.5 ) / $lastDuration;
 295                                         if ( ( $factor > 1.1 ) && ( $factor < 100 ) ) {
 296                                                 // educated guess is reasonable
 297                                                 $iterations = (int)( $iterations * $factor );
 298                                         }
 299                                 }
 300
 301                                 if ( $old_iterations == $iterations ) {
 302                                         // Heuristics were not applied, so we just *2.
 303                                         $iterations *= 2;
 304                                 }
 305
 306                                 $this->assertLessThan( 50000, $iterations,
 307                                         "Emergency stop against infinitely increasing iteration "
 308                                                 . "count ( last duration: $lastDuration )" );
 309                         }
 310                 }
 311
 312                 // The dump (hopefully) did take long enough to produce more than one
 313                 // checkpoint file.
 314                 // We now check all the checkpoint files for validity.
 315
 316                 $files = scandir( $nameOutputDir );
 317                 $this->assertTrue( asort( $files ), "Sorting files in temporary directory" );
 318                 $fileOpened = false;
 319                 $lookingForPage = 1;
 320                 $checkpointFiles = 0;
 321
 322                 // Each run of the following loop body tries to handle exactly 1 /page/ (not
 323                 // iteration of stub content). $i is only increased after having treated page 4.
 324                 for ( $i = 0; $i < $iterations; ) {
 325                         // 1. Assuring a file is opened and ready. Skipping across header if
 326                         //    necessary.
 327                         if ( !$fileOpened ) {
 328                                 $this->assertNotEmpty( $files, "No more existing dump files, "
 329                                         . "but not yet all pages found" );
 330                                 $fname = array_shift( $files );
 331                                 while ( $fname == "." || $fname == ".." ) {
 332                                         $this->assertNotEmpty( $files, "No more existing dump"
 333                                                 . " files, but not yet all pages found" );
 334                                         $fname = array_shift( $files );
 335                                 }
 336                                 if ( $checkpointFormat == "gzip" ) {
 337                                         $this->gunzip( $nameOutputDir . "/" . $fname );
 338                                 }
 339                                 $this->assertDumpStart( $nameOutputDir . "/" . $fname );
 340                                 $fileOpened = true;
 341                                 $checkpointFiles++;
 342                         }
 343
 344                         // 2. Performing a single page check
 345                         switch ( $lookingForPage ) {
 346                                 case 1:
 347                                         // Page 1
 348                                         $this->assertPageStart( $this->pageId1 + $i * self::$numOfPages, NS_MAIN,
 349                                                 "BackupDumperTestP1" );
 350                                         $this->assertRevision( $this->revId1_1 + $i * self::$numOfRevs, "BackupDumperTestP1Summary1",
 351                                                 $this->textId1_1, false, "0bolhl6ol7i6x0e7yq91gxgaan39j87",
 352                                                 "BackupDumperTestP1Text1" );
 353                                         $this->assertPageEnd();
 354
 355                                         $lookingForPage = 2;
 356                                         break;
 357
 358                                 case 2:
 359                                         // Page 2
 360                                         $this->assertPageStart( $this->pageId2 + $i * self::$numOfPages, NS_MAIN,
 361                                                 "BackupDumperTestP2" );
 362                                         $this->assertRevision( $this->revId2_1 + $i * self::$numOfRevs, "BackupDumperTestP2Summary1",
 363                                                 $this->textId2_1, false, "jprywrymfhysqllua29tj3sc7z39dl2",
 364                                                 "BackupDumperTestP2Text1" );
 365                                         $this->assertRevision( $this->revId2_2 + $i * self::$numOfRevs, "BackupDumperTestP2Summary2",
 366                                                 $this->textId2_2, false, "b7vj5ks32po5m1z1t1br4o7scdwwy95",
 367                                                 "BackupDumperTestP2Text2", $this->revId2_1 + $i * self::$numOfRevs );
 368                                         $this->assertRevision( $this->revId2_3 + $i * self::$numOfRevs, "BackupDumperTestP2Summary3",
 369                                                 $this->textId2_3, false, "jfunqmh1ssfb8rs43r19w98k28gg56r",
 370                                                 "BackupDumperTestP2Text3", $this->revId2_2 + $i * self::$numOfRevs );
 371                                         $this->assertRevision( $this->revId2_4 + $i * self::$numOfRevs,
 372                                                 "BackupDumperTestP2Summary4 extra",
 373                                                 $this->textId2_4, false, "6o1ciaxa6pybnqprmungwofc4lv00wv",
 374                                                 "BackupDumperTestP2Text4 some additional Text",
 375                                                 $this->revId2_3 + $i * self::$numOfRevs );
 376                                         $this->assertPageEnd();
 377
 378                                         $lookingForPage = 4;
 379                                         break;
 380
 381                                 case 4:
 382                                         // Page 4
 383                                         $this->assertPageStart( $this->pageId4 + $i * self::$numOfPages, NS_TALK,
 384                                                 "Talk:BackupDumperTestP1" );
 385                                         $this->assertRevision( $this->revId4_1 + $i * self::$numOfRevs,
 386                                                 "Talk BackupDumperTestP1 Summary1",
 387                                                 $this->textId4_1, false, "nktofwzd0tl192k3zfepmlzxoax1lpe",
 388                                                 "TALK ABOUT BACKUPDUMPERTESTP1 TEXT1",
 389                                                 false,
 390                                                 "BackupTextPassTestModel",
 391                                                 "text/plain" );
 392                                         $this->assertPageEnd();
 393
 394                                         $lookingForPage = 1;
 395
 396                                         // We dealt with the whole iteration.
 397                                         $i++;
 398                                         break;
 399
 400                                 default:
 401                                         $this->fail( "Bad setting for lookingForPage ($lookingForPage)" );
 402                         }
 403
 404                         // 3. Checking for the end of the current checkpoint file
 405                         if ( $this->xml->nodeType == XMLReader::END_ELEMENT
 406                                 && $this->xml->name == "mediawiki"
 407                         ) {
 408                                 $this->assertDumpEnd();
 409                                 $fileOpened = false;
 410                         }
 411                 }
 412
 413                 // Assuring we completely read all files ...
 414                 $this->assertFalse( $fileOpened, "Currently read file still open?" );
 415                 $this->assertEmpty( $files, "Remaining unchecked files" );
 416
 417                 // ... and have dealt with more than one checkpoint file
 418                 $this->assertGreaterThan(
 419                         1,
 420                         $checkpointFiles,
 421                         "expected more than 1 checkpoint to have been created. "
 422                                 . "Checkpoint interval is $checkpointAfter seconds, maybe your computer is too fast?"
 423                 );
 424
 425                 $this->expectETAOutput();
 426         }
 427
 428         /**
 429          * Broken per T70653.
 430          *
 431          * @group large
 432          * @group Broken
 433          */
 434         function testCheckpointPlain() {
 435                 $this->checkpointHelper();
 436         }
 437
 438         /**
 439          * tests for working checkpoint generation in gzip format work.
 440          *
 441          * We keep this test in addition to the simpler self::testCheckpointPlain, as there
 442          * were once problems when the used sinks were DumpPipeOutputs.
 443          *
 444          * xmldumps-backup typically uses bzip2 instead of gzip. However, as bzip2 requires
 445          * PHP extensions, we go for gzip instead, which triggers the same relevant code
 446          * paths while still being testable on more systems.
 447          *
 448          * Broken per T70653.
 449          *
 450          * @group large
 451          * @group Broken
 452          */
 453         function testCheckpointGzip() {
 454                 $this->checkHasGzip();
 455                 $this->checkpointHelper( "gzip" );
 456         }
 457
 458         /**
 459          * Creates a stub file that is used for testing the text pass of dumps
 460          *
 461          * @param string $fname (Optional) Absolute name of the file to write
 462          *   the stub into. If this parameter is null, a new temporary
 463          *   file is generated that is automatically removed upon tearDown.
 464          * @param int $iterations (Optional) specifies how often the block
 465          *   of 3 pages should go into the stub file. The page and
 466          *   revision id increase further and further, while the text
 467          *   id of the first iteration is reused. The pages and revision
 468          *   of iteration > 1 have no corresponding representation in the database.
 469          * @return string Absolute filename of the stub
 470          */
 471         private function setUpStub( $fname = null, $iterations = 1 ) {
 472                 if ( $fname === null ) {
 473                         $fname = $this->getNewTempFile();
 474                 }
 475                 $header = '<mediawiki xmlns="http://www.mediawiki.org/xml/export-0.10/" '
 476                         . 'xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" '
 477                         . 'xsi:schemaLocation="http://www.mediawiki.org/xml/export-0.10/ '
 478                         . 'http://www.mediawiki.org/xml/export-0.10.xsd" version="0.10" xml:lang="en">
 479   <siteinfo>
 480     <sitename>wikisvn</sitename>
 481     <base>http://localhost/wiki-svn/index.php/Main_Page</base>
 482     <generator>MediaWiki 1.21alpha</generator>
 483     <case>first-letter</case>
 484     <namespaces>
 485       <namespace key="-2" case="first-letter">Media</namespace>
 486       <namespace key="-1" case="first-letter">Special</namespace>
 487       <namespace key="0" case="first-letter" />
 488       <namespace key="1" case="first-letter">Talk</namespace>
 489       <namespace key="2" case="first-letter">User</namespace>
 490       <namespace key="3" case="first-letter">User talk</namespace>
 491       <namespace key="4" case="first-letter">Wikisvn</namespace>
 492       <namespace key="5" case="first-letter">Wikisvn talk</namespace>
 493       <namespace key="6" case="first-letter">File</namespace>
 494       <namespace key="7" case="first-letter">File talk</namespace>
 495       <namespace key="8" case="first-letter">MediaWiki</namespace>
 496       <namespace key="9" case="first-letter">MediaWiki talk</namespace>
 497       <namespace key="10" case="first-letter">Template</namespace>
 498       <namespace key="11" case="first-letter">Template talk</namespace>
 499       <namespace key="12" case="first-letter">Help</namespace>
 500       <namespace key="13" case="first-letter">Help talk</namespace>
 501       <namespace key="14" case="first-letter">Category</namespace>
 502       <namespace key="15" case="first-letter">Category talk</namespace>
 503     </namespaces>
 504   </siteinfo>
 505 ';
 506                 $tail = '</mediawiki>
 507 ';
 508
 509                 $content = $header;
 510                 $iterations = intval( $iterations );
 511                 for ( $i = 0; $i < $iterations; $i++ ) {
 512                         $page1 = '  <page>
 513     <title>BackupDumperTestP1</title>
 514     <ns>0</ns>
 515     <id>' . ( $this->pageId1 + $i * self::$numOfPages ) . '</id>
 516     <revision>
 517       <id>' . ( $this->revId1_1 + $i * self::$numOfRevs ) . '</id>
 518       <timestamp>2012-04-01T16:46:05Z</timestamp>
 519       <contributor>
 520         <ip>127.0.0.1</ip>
 521       </contributor>
 522       <comment>BackupDumperTestP1Summary1</comment>
 523       <model>wikitext</model>
 524       <format>text/x-wiki</format>
 525       <text id="' . $this->textId1_1 . '" bytes="23" />
 526       <sha1>0bolhl6ol7i6x0e7yq91gxgaan39j87</sha1>
 527     </revision>
 528   </page>
 529 ';
 530                         $page2 = '  <page>
 531     <title>BackupDumperTestP2</title>
 532     <ns>0</ns>
 533     <id>' . ( $this->pageId2 + $i * self::$numOfPages ) . '</id>
 534     <revision>
 535       <id>' . ( $this->revId2_1 + $i * self::$numOfRevs ) . '</id>
 536       <timestamp>2012-04-01T16:46:05Z</timestamp>
 537       <contributor>
 538         <ip>127.0.0.1</ip>
 539       </contributor>
 540       <comment>BackupDumperTestP2Summary1</comment>
 541       <model>wikitext</model>
 542       <format>text/x-wiki</format>
 543       <text id="' . $this->textId2_1 . '" bytes="23" />
 544       <sha1>jprywrymfhysqllua29tj3sc7z39dl2</sha1>
 545     </revision>
 546     <revision>
 547       <id>' . ( $this->revId2_2 + $i * self::$numOfRevs ) . '</id>
 548       <parentid>' . ( $this->revId2_1 + $i * self::$numOfRevs ) . '</parentid>
 549       <timestamp>2012-04-01T16:46:05Z</timestamp>
 550       <contributor>
 551         <ip>127.0.0.1</ip>
 552       </contributor>
 553       <comment>BackupDumperTestP2Summary2</comment>
 554       <model>wikitext</model>
 555       <format>text/x-wiki</format>
 556       <text id="' . $this->textId2_2 . '" bytes="23" />
 557       <sha1>b7vj5ks32po5m1z1t1br4o7scdwwy95</sha1>
 558     </revision>
 559     <revision>
 560       <id>' . ( $this->revId2_3 + $i * self::$numOfRevs ) . '</id>
 561       <parentid>' . ( $this->revId2_2 + $i * self::$numOfRevs ) . '</parentid>
 562       <timestamp>2012-04-01T16:46:05Z</timestamp>
 563       <contributor>
 564         <ip>127.0.0.1</ip>
 565       </contributor>
 566       <comment>BackupDumperTestP2Summary3</comment>
 567       <model>wikitext</model>
 568       <format>text/x-wiki</format>
 569       <text id="' . $this->textId2_3 . '" bytes="23" />
 570       <sha1>jfunqmh1ssfb8rs43r19w98k28gg56r</sha1>
 571     </revision>
 572     <revision>
 573       <id>' . ( $this->revId2_4 + $i * self::$numOfRevs ) . '</id>
 574       <parentid>' . ( $this->revId2_3 + $i * self::$numOfRevs ) . '</parentid>
 575       <timestamp>2012-04-01T16:46:05Z</timestamp>
 576       <contributor>
 577         <ip>127.0.0.1</ip>
 578       </contributor>
 579       <comment>BackupDumperTestP2Summary4 extra</comment>
 580       <model>wikitext</model>
 581       <format>text/x-wiki</format>
 582       <text id="' . $this->textId2_4 . '" bytes="44" />
 583       <sha1>6o1ciaxa6pybnqprmungwofc4lv00wv</sha1>
 584     </revision>
 585   </page>
 586 ';
 587                         // page 3 not in stub
 588
 589                         $page4 = '  <page>
 590     <title>Talk:BackupDumperTestP1</title>
 591     <ns>1</ns>
 592     <id>' . ( $this->pageId4 + $i * self::$numOfPages ) . '</id>
 593     <revision>
 594       <id>' . ( $this->revId4_1 + $i * self::$numOfRevs ) . '</id>
 595       <timestamp>2012-04-01T16:46:05Z</timestamp>
 596       <contributor>
 597         <ip>127.0.0.1</ip>
 598       </contributor>
 599       <comment>Talk BackupDumperTestP1 Summary1</comment>
 600       <model>BackupTextPassTestModel</model>
 601       <format>text/plain</format>
 602       <text id="' . $this->textId4_1 . '" bytes="35" />
 603       <sha1>nktofwzd0tl192k3zfepmlzxoax1lpe</sha1>
 604     </revision>
 605   </page>
 606 ';
 607                         $content .= $page1 . $page2 . $page4;
 608                 }
 609                 $content .= $tail;
 610                 $this->assertEquals( strlen( $content ), file_put_contents(
 611                         $fname, $content ), "Length of prepared stub" );
 612
 613                 return $fname;
 614         }
 615 }
 616
 617 class BackupTextPassTestModelHandler extends TextContentHandler {
 618
 619         public function __construct() {
 620                 parent::__construct( 'BackupTextPassTestModel' );
 621         }
 622
 623         public function exportTransform( $text, $format = null ) {
 624                 return strtoupper( $text );
 625         }
 626
 627 }
 628
 629 /**
 630  * Tests for TextPassDumper that do not rely on the database
 631  *
 632  * (As the Database group is only detected at class level (not method level), we
 633  * cannot bring this test case's tests into the above main test case.)
 634  *
 635  * @group Dump
 636  * @covers TextPassDumper
 637  */
 638 class TextPassDumperDatabaselessTest extends MediaWikiLangTestCase {
 639         /**
 640          * Ensures that setting the buffer size is effective.
 641          *
 642          * @dataProvider bufferSizeProvider
 643          */
 644         function testBufferSizeSetting( $expected, $size, $msg ) {
 645                 $dumper = new TextPassDumperAccessor();
 646                 $dumper->loadWithArgv( [ "--buffersize=" . $size ] );
 647                 $dumper->execute();
 648                 $this->assertEquals( $expected, $dumper->getBufferSize(), $msg );
 649         }
 650
 651         /**
 652          * Ensures that setting the buffer size is effective.
 653          *
 654          * @dataProvider bufferSizeProvider
 655          */
 656         function bufferSizeProvider() {
 657                 // expected, bufferSize to initialize with, message
 658                 return [
 659                         [ 512 * 1024, 512 * 1024, "Setting 512KB is not effective" ],
 660                         [ 8192, 8192, "Setting 8KB is not effective" ],
 661                         [ 4096, 2048, "Could set buffer size below lower bound" ]
 662                 ];
 663         }
 664 }
 665
 666 /**
 667  * Accessor for internal state of TextPassDumper
 668  *
 669  * Do not warrentless add getters here.
 670  */
 671 class TextPassDumperAccessor extends TextPassDumper {
 672         /**
 673          * Gets the bufferSize.
 674          *
 675          * If bufferSize setting does not work correctly, testCheckpoint... tests
 676          * fail and point in the wrong direction. To aid in troubleshooting when
 677          * testCheckpoint... tests break at some point in the future, we test the
 678          * bufferSize setting, hence need this accessor.
 679          *
 680          * (Yes, bufferSize is internal state of the TextPassDumper, but aiding
 681          * debugging of testCheckpoint... in the future seems to be worth testing
 682          * against it nonetheless.)
 683          */
 684         public function getBufferSize() {
 685                 return $this->bufferSize;
 686         }
 687
 688         function dump( $history, $text = null ) {
 689                 return true;
 690         }
 691 }