tests/phpunit/maintenance/backupTextPassTest.php

   1 <?php
   2
   3 require_once __DIR__ . "/../../../maintenance/backupTextPass.inc";
   4
   5 /**
   6  * Tests for page dumps of BackupDumper
   7  *
   8  * @group Database
   9  * @group Dump
  10  */
  11 class TextPassDumperTest extends DumpTestCase {
  12
  13         // We'll add several pages, revision and texts. The following variables hold the
  14         // corresponding ids.
  15         private $pageId1, $pageId2, $pageId3, $pageId4;
  16         private static $numOfPages = 4;
  17         private $revId1_1, $textId1_1;
  18         private $revId2_1, $textId2_1, $revId2_2, $textId2_2;
  19         private $revId2_3, $textId2_3, $revId2_4, $textId2_4;
  20         private $revId3_1, $textId3_1, $revId3_2, $textId3_2;
  21         private $revId4_1, $textId4_1;
  22         private static $numOfRevs = 8;
  23
  24         function addDBData() {
  25                 $this->tablesUsed[] = 'page';
  26                 $this->tablesUsed[] = 'revision';
  27                 $this->tablesUsed[] = 'text';
  28
  29                 $ns = $this->getDefaultWikitextNS();
  30
  31                 try {
  32                         // Simple page
  33                         $title = Title::newFromText( 'BackupDumperTestP1', $ns );
  34                         $page = WikiPage::factory( $title );
  35                         list( $this->revId1_1, $this->textId1_1 ) = $this->addRevision( $page,
  36                                 "BackupDumperTestP1Text1", "BackupDumperTestP1Summary1" );
  37                         $this->pageId1 = $page->getId();
  38
  39                         // Page with more than one revision
  40                         $title = Title::newFromText( 'BackupDumperTestP2', $ns );
  41                         $page = WikiPage::factory( $title );
  42                         list( $this->revId2_1, $this->textId2_1 ) = $this->addRevision( $page,
  43                                 "BackupDumperTestP2Text1", "BackupDumperTestP2Summary1" );
  44                         list( $this->revId2_2, $this->textId2_2 ) = $this->addRevision( $page,
  45                                 "BackupDumperTestP2Text2", "BackupDumperTestP2Summary2" );
  46                         list( $this->revId2_3, $this->textId2_3 ) = $this->addRevision( $page,
  47                                 "BackupDumperTestP2Text3", "BackupDumperTestP2Summary3" );
  48                         list( $this->revId2_4, $this->textId2_4 ) = $this->addRevision( $page,
  49                                 "BackupDumperTestP2Text4 some additional Text  ",
  50                                 "BackupDumperTestP2Summary4 extra " );
  51                         $this->pageId2 = $page->getId();
  52
  53                         // Deleted page.
  54                         $title = Title::newFromText( 'BackupDumperTestP3', $ns );
  55                         $page = WikiPage::factory( $title );
  56                         list( $this->revId3_1, $this->textId3_1 ) = $this->addRevision( $page,
  57                                 "BackupDumperTestP3Text1", "BackupDumperTestP2Summary1" );
  58                         list( $this->revId3_2, $this->textId3_2 ) = $this->addRevision( $page,
  59                                 "BackupDumperTestP3Text2", "BackupDumperTestP2Summary2" );
  60                         $this->pageId3 = $page->getId();
  61                         $page->doDeleteArticle( "Testing ;)" );
  62
  63                         // Page from non-default namespace
  64
  65                         if ( $ns === NS_TALK ) {
  66                                 // @todo work around this.
  67                                 throw new MWException( "The default wikitext namespace is the talk namespace. "
  68                                         . " We can't currently deal with that." );
  69                         }
  70
  71                         $title = Title::newFromText( 'BackupDumperTestP1', NS_TALK );
  72                         $page = WikiPage::factory( $title );
  73                         list( $this->revId4_1, $this->textId4_1 ) = $this->addRevision( $page,
  74                                 "Talk about BackupDumperTestP1 Text1",
  75                                 "Talk BackupDumperTestP1 Summary1" );
  76                         $this->pageId4 = $page->getId();
  77                 } catch ( Exception $e ) {
  78                         // We'd love to pass $e directly. However, ... see
  79                         // documentation of exceptionFromAddDBData in
  80                         // DumpTestCase
  81                         $this->exceptionFromAddDBData = $e;
  82                 }
  83         }
  84
  85         protected function setUp() {
  86                 parent::setUp();
  87
  88                 // Since we will restrict dumping by page ranges (to allow
  89                 // working tests, even if the db gets prepopulated by a base
  90                 // class), we have to assert, that the page id are consecutively
  91                 // increasing
  92                 $this->assertEquals(
  93                         array( $this->pageId2, $this->pageId3, $this->pageId4 ),
  94                         array( $this->pageId1 + 1, $this->pageId2 + 1, $this->pageId3 + 1 ),
  95                         "Page ids increasing without holes" );
  96         }
  97
  98         function testPlain() {
  99                 // Setting up the dump
 100                 $nameStub = $this->setUpStub();
 101                 $nameFull = $this->getNewTempFile();
 102                 $dumper = new TextPassDumper( array( "--stub=file:" . $nameStub,
 103                         "--output=file:" . $nameFull ) );
 104                 $dumper->reporting = false;
 105                 $dumper->setDb( $this->db );
 106
 107                 // Performing the dump
 108                 $dumper->dump( WikiExporter::FULL, WikiExporter::TEXT );
 109
 110                 // Checking for correctness of the dumped data
 111                 $this->assertDumpStart( $nameFull );
 112
 113                 // Page 1
 114                 $this->assertPageStart( $this->pageId1, NS_MAIN, "BackupDumperTestP1" );
 115                 $this->assertRevision( $this->revId1_1, "BackupDumperTestP1Summary1",
 116                         $this->textId1_1, false, "0bolhl6ol7i6x0e7yq91gxgaan39j87",
 117                         "BackupDumperTestP1Text1" );
 118                 $this->assertPageEnd();
 119
 120                 // Page 2
 121                 $this->assertPageStart( $this->pageId2, NS_MAIN, "BackupDumperTestP2" );
 122                 $this->assertRevision( $this->revId2_1, "BackupDumperTestP2Summary1",
 123                         $this->textId2_1, false, "jprywrymfhysqllua29tj3sc7z39dl2",
 124                         "BackupDumperTestP2Text1" );
 125                 $this->assertRevision( $this->revId2_2, "BackupDumperTestP2Summary2",
 126                         $this->textId2_2, false, "b7vj5ks32po5m1z1t1br4o7scdwwy95",
 127                         "BackupDumperTestP2Text2", $this->revId2_1 );
 128                 $this->assertRevision( $this->revId2_3, "BackupDumperTestP2Summary3",
 129                         $this->textId2_3, false, "jfunqmh1ssfb8rs43r19w98k28gg56r",
 130                         "BackupDumperTestP2Text3", $this->revId2_2 );
 131                 $this->assertRevision( $this->revId2_4, "BackupDumperTestP2Summary4 extra",
 132                         $this->textId2_4, false, "6o1ciaxa6pybnqprmungwofc4lv00wv",
 133                         "BackupDumperTestP2Text4 some additional Text", $this->revId2_3 );
 134                 $this->assertPageEnd();
 135
 136                 // Page 3
 137                 // -> Page is marked deleted. Hence not visible
 138
 139                 // Page 4
 140                 $this->assertPageStart( $this->pageId4, NS_TALK, "Talk:BackupDumperTestP1" );
 141                 $this->assertRevision( $this->revId4_1, "Talk BackupDumperTestP1 Summary1",
 142                         $this->textId4_1, false, "nktofwzd0tl192k3zfepmlzxoax1lpe",
 143                         "Talk about BackupDumperTestP1 Text1" );
 144                 $this->assertPageEnd();
 145
 146                 $this->assertDumpEnd();
 147         }
 148
 149         function testPrefetchPlain() {
 150                 // The mapping between ids and text, for the hits of the prefetch mock
 151                 $prefetchMap = array(
 152                         array( $this->pageId1, $this->revId1_1, "Prefetch_________1Text1" ),
 153                         array( $this->pageId2, $this->revId2_3, "Prefetch_________2Text3" )
 154                 );
 155
 156                 // The mock itself
 157                 $prefetchMock = $this->getMock( 'BaseDump', array( 'prefetch' ), array(), '', false );
 158                 $prefetchMock->expects( $this->exactly( 6 ) )
 159                         ->method( 'prefetch' )
 160                         ->will( $this->returnValueMap( $prefetchMap ) );
 161
 162                 // Setting up of the dump
 163                 $nameStub = $this->setUpStub();
 164                 $nameFull = $this->getNewTempFile();
 165                 $dumper = new TextPassDumper( array( "--stub=file:"
 166                         . $nameStub, "--output=file:" . $nameFull ) );
 167                 $dumper->prefetch = $prefetchMock;
 168                 $dumper->reporting = false;
 169                 $dumper->setDb( $this->db );
 170
 171                 // Performing the dump
 172                 $dumper->dump( WikiExporter::FULL, WikiExporter::TEXT );
 173
 174                 // Checking for correctness of the dumped data
 175                 $this->assertDumpStart( $nameFull );
 176
 177                 // Page 1
 178                 $this->assertPageStart( $this->pageId1, NS_MAIN, "BackupDumperTestP1" );
 179                 // Prefetch kicks in. This is still the SHA-1 of the original text,
 180                 // But the actual text (with different SHA-1) comes from prefetch.
 181                 $this->assertRevision( $this->revId1_1, "BackupDumperTestP1Summary1",
 182                         $this->textId1_1, false, "0bolhl6ol7i6x0e7yq91gxgaan39j87",
 183                         "Prefetch_________1Text1" );
 184                 $this->assertPageEnd();
 185
 186                 // Page 2
 187                 $this->assertPageStart( $this->pageId2, NS_MAIN, "BackupDumperTestP2" );
 188                 $this->assertRevision( $this->revId2_1, "BackupDumperTestP2Summary1",
 189                         $this->textId2_1, false, "jprywrymfhysqllua29tj3sc7z39dl2",
 190                         "BackupDumperTestP2Text1" );
 191                 $this->assertRevision( $this->revId2_2, "BackupDumperTestP2Summary2",
 192                         $this->textId2_2, false, "b7vj5ks32po5m1z1t1br4o7scdwwy95",
 193                         "BackupDumperTestP2Text2", $this->revId2_1 );
 194                 // Prefetch kicks in. This is still the SHA-1 of the original text,
 195                 // But the actual text (with different SHA-1) comes from prefetch.
 196                 $this->assertRevision( $this->revId2_3, "BackupDumperTestP2Summary3",
 197                         $this->textId2_3, false, "jfunqmh1ssfb8rs43r19w98k28gg56r",
 198                         "Prefetch_________2Text3", $this->revId2_2 );
 199                 $this->assertRevision( $this->revId2_4, "BackupDumperTestP2Summary4 extra",
 200                         $this->textId2_4, false, "6o1ciaxa6pybnqprmungwofc4lv00wv",
 201                         "BackupDumperTestP2Text4 some additional Text", $this->revId2_3 );
 202                 $this->assertPageEnd();
 203
 204                 // Page 3
 205                 // -> Page is marked deleted. Hence not visible
 206
 207                 // Page 4
 208                 $this->assertPageStart( $this->pageId4, NS_TALK, "Talk:BackupDumperTestP1" );
 209                 $this->assertRevision( $this->revId4_1, "Talk BackupDumperTestP1 Summary1",
 210                         $this->textId4_1, false, "nktofwzd0tl192k3zfepmlzxoax1lpe",
 211                         "Talk about BackupDumperTestP1 Text1" );
 212                 $this->assertPageEnd();
 213
 214                 $this->assertDumpEnd();
 215         }
 216
 217         /**
 218          * Ensures that checkpoint dumps are used and written, by successively increasing the
 219          * stub size and dumping until the duration crosses a threshold.
 220          *
 221          * @param $checkpointFormat string: Either "file" for plain text or "gzip" for gzipped
 222          *                checkpoint files.
 223          */
 224         private function checkpointHelper( $checkpointFormat = "file" ) {
 225                 // Getting temporary names
 226                 $nameStub = $this->getNewTempFile();
 227                 $nameOutputDir = $this->getNewTempDirectory();
 228
 229                 $stderr = fopen( 'php://output', 'a' );
 230                 if ( $stderr === false ) {
 231                         $this->fail( "Could not open stream for stderr" );
 232                 }
 233
 234                 $iterations = 32; // We'll start with that many iterations of revisions in stub
 235                 $lastDuration = 0;
 236                 $minDuration = 2; // We want the dump to take at least this many seconds
 237                 $checkpointAfter = 0.5; // Generate checkpoint after this many seconds
 238
 239                 // Until a dump takes at least $minDuration seconds, perform a dump and check
 240                 // duration. If the dump did not take long enough increase the iteration
 241                 // count, to generate a bigger stub file next time.
 242                 while ( $lastDuration < $minDuration ) {
 243
 244                         // Setting up the dump
 245                         wfRecursiveRemoveDir( $nameOutputDir );
 246                         $this->assertTrue( wfMkdirParents( $nameOutputDir ),
 247                                 "Creating temporary output directory " );
 248                         $this->setUpStub( $nameStub, $iterations );
 249                         $dumper = new TextPassDumper( array( "--stub=file:" . $nameStub,
 250                                 "--output=" . $checkpointFormat . ":" . $nameOutputDir . "/full",
 251                                 "--maxtime=1" /*This is in minutes. Fixup is below*/,
 252                                 "--checkpointfile=checkpoint-%s-%s.xml.gz" ) );
 253                         $dumper->setDb( $this->db );
 254                         $dumper->maxTimeAllowed = $checkpointAfter; // Patching maxTime from 1 minute
 255                         $dumper->stderr = $stderr;
 256
 257                         // The actual dump and taking time
 258                         $ts_before = microtime( true );
 259                         $dumper->dump( WikiExporter::FULL, WikiExporter::TEXT );
 260                         $ts_after = microtime( true );
 261                         $lastDuration = $ts_after - $ts_before;
 262
 263                         // Handling increasing the iteration count for the stubs
 264                         if ( $lastDuration < $minDuration ) {
 265                                 $old_iterations = $iterations;
 266                                 if ( $lastDuration > 0.2 ) {
 267                                         // lastDuration is big enough, to allow an educated guess
 268                                         $factor = ( $minDuration + 0.5 ) / $lastDuration;
 269                                         if ( ( $factor > 1.1 ) && ( $factor < 100 ) ) {
 270                                                 // educated guess is reasonable
 271                                                 $iterations = (int)( $iterations * $factor );
 272                                         }
 273                                 }
 274
 275                                 if ( $old_iterations == $iterations ) {
 276                                         // Heuristics were not applied, so we just *2.
 277                                         $iterations *= 2;
 278                                 }
 279
 280                                 $this->assertLessThan( 50000, $iterations,
 281                                         "Emergency stop against infinitely increasing iteration "
 282                                                 . "count ( last duration: $lastDuration )" );
 283                         }
 284                 }
 285
 286                 // The dump (hopefully) did take long enough to produce more than one
 287                 // checkpoint file.
 288                 //
 289                 // We now check all the checkpoint files for validity.
 290
 291                 $files = scandir( $nameOutputDir );
 292                 $this->assertTrue( asort( $files ), "Sorting files in temporary directory" );
 293                 $fileOpened = false;
 294                 $lookingForPage = 1;
 295                 $checkpointFiles = 0;
 296
 297                 // Each run of the following loop body tries to handle exactly 1 /page/ (not
 298                 // iteration of stub content). $i is only increased after having treated page 4.
 299                 for ( $i = 0; $i < $iterations; ) {
 300
 301                         // 1. Assuring a file is opened and ready. Skipping across header if
 302                         //    necessary.
 303                         if ( !$fileOpened ) {
 304                                 $this->assertNotEmpty( $files, "No more existing dump files, "
 305                                         . "but not yet all pages found" );
 306                                 $fname = array_shift( $files );
 307                                 while ( $fname == "." || $fname == ".." ) {
 308                                         $this->assertNotEmpty( $files, "No more existing dump"
 309                                                 . " files, but not yet all pages found" );
 310                                         $fname = array_shift( $files );
 311                                 }
 312                                 if ( $checkpointFormat == "gzip" ) {
 313                                         $this->gunzip( $nameOutputDir . "/" . $fname );
 314                                 }
 315                                 $this->assertDumpStart( $nameOutputDir . "/" . $fname );
 316                                 $fileOpened = true;
 317                                 $checkpointFiles++;
 318                         }
 319
 320                         // 2. Performing a single page check
 321                         switch ( $lookingForPage ) {
 322                                 case 1:
 323                                         // Page 1
 324                                         $this->assertPageStart( $this->pageId1 + $i * self::$numOfPages, NS_MAIN,
 325                                                 "BackupDumperTestP1" );
 326                                         $this->assertRevision( $this->revId1_1 + $i * self::$numOfRevs, "BackupDumperTestP1Summary1",
 327                                                 $this->textId1_1, false, "0bolhl6ol7i6x0e7yq91gxgaan39j87",
 328                                                 "BackupDumperTestP1Text1" );
 329                                         $this->assertPageEnd();
 330
 331                                         $lookingForPage = 2;
 332                                         break;
 333
 334                                 case 2:
 335                                         // Page 2
 336                                         $this->assertPageStart( $this->pageId2 + $i * self::$numOfPages, NS_MAIN,
 337                                                 "BackupDumperTestP2" );
 338                                         $this->assertRevision( $this->revId2_1 + $i * self::$numOfRevs, "BackupDumperTestP2Summary1",
 339                                                 $this->textId2_1, false, "jprywrymfhysqllua29tj3sc7z39dl2",
 340                                                 "BackupDumperTestP2Text1" );
 341                                         $this->assertRevision( $this->revId2_2 + $i * self::$numOfRevs, "BackupDumperTestP2Summary2",
 342                                                 $this->textId2_2, false, "b7vj5ks32po5m1z1t1br4o7scdwwy95",
 343                                                 "BackupDumperTestP2Text2", $this->revId2_1 + $i * self::$numOfRevs );
 344                                         $this->assertRevision( $this->revId2_3 + $i * self::$numOfRevs, "BackupDumperTestP2Summary3",
 345                                                 $this->textId2_3, false, "jfunqmh1ssfb8rs43r19w98k28gg56r",
 346                                                 "BackupDumperTestP2Text3", $this->revId2_2 + $i * self::$numOfRevs );
 347                                         $this->assertRevision( $this->revId2_4 + $i * self::$numOfRevs,
 348                                                 "BackupDumperTestP2Summary4 extra",
 349                                                 $this->textId2_4, false, "6o1ciaxa6pybnqprmungwofc4lv00wv",
 350                                                 "BackupDumperTestP2Text4 some additional Text",
 351                                                 $this->revId2_3 + $i * self::$numOfRevs );
 352                                         $this->assertPageEnd();
 353
 354                                         $lookingForPage = 4;
 355                                         break;
 356
 357                                 case 4:
 358                                         // Page 4
 359                                         $this->assertPageStart( $this->pageId4 + $i * self::$numOfPages, NS_TALK,
 360                                                 "Talk:BackupDumperTestP1" );
 361                                         $this->assertRevision( $this->revId4_1 + $i * self::$numOfRevs,
 362                                                 "Talk BackupDumperTestP1 Summary1",
 363                                                 $this->textId4_1, false, "nktofwzd0tl192k3zfepmlzxoax1lpe",
 364                                                 "Talk about BackupDumperTestP1 Text1" );
 365                                         $this->assertPageEnd();
 366
 367                                         $lookingForPage = 1;
 368
 369                                         // We dealt with the whole iteration.
 370                                         $i++;
 371                                         break;
 372
 373                                 default:
 374                                         $this->fail( "Bad setting for lookingForPage ($lookingForPage)" );
 375                         }
 376
 377                         // 3. Checking for the end of the current checkpoint file
 378                         if ( $this->xml->nodeType == XMLReader::END_ELEMENT
 379                                 && $this->xml->name == "mediawiki"
 380                         ) {
 381                                 $this->assertDumpEnd();
 382                                 $fileOpened = false;
 383                         }
 384                 }
 385
 386                 // Assuring we completely read all files ...
 387                 $this->assertFalse( $fileOpened, "Currently read file still open?" );
 388                 $this->assertEmpty( $files, "Remaining unchecked files" );
 389
 390                 // ... and have dealt with more than one checkpoint file
 391                 $this->assertGreaterThan( 1, $checkpointFiles, "expected more than 1 checkpoint to have been created. Checkpoint interval is $checkpointAfter seconds, maybe your computer is too fast?" );
 392
 393                 $this->expectETAOutput();
 394         }
 395
 396         /**
 397          * @group large
 398          */
 399         function testCheckpointPlain() {
 400                 $this->checkpointHelper();
 401         }
 402
 403         /**
 404          * tests for working checkpoint generation in gzip format work.
 405          *
 406          * We keep this test in addition to the simpler self::testCheckpointPlain, as there
 407          * were once problems when the used sinks were DumpPipeOutputs.
 408          *
 409          * xmldumps-backup typically uses bzip2 instead of gzip. However, as bzip2 requires
 410          * PHP extensions, we go for gzip instead, which triggers the same relevant code
 411          * paths while still being testable on more systems.
 412          *
 413          * @group large
 414          */
 415         function testCheckpointGzip() {
 416                 $this->checkHasGzip();
 417                 $this->checkpointHelper( "gzip" );
 418         }
 419
 420
 421         /**
 422          * Creates a stub file that is used for testing the text pass of dumps
 423          *
 424          * @param $fname string: (Optional) Absolute name of the file to write
 425          *           the stub into. If this parameter is null, a new temporary
 426          *           file is generated that is automatically removed upon
 427          *           tearDown.
 428          * @param $iterations integer: (Optional) specifies how often the block
 429          *           of 3 pages should go into the stub file. The page and
 430          *           revision id increase further and further, while the text
 431          *           id of the first iteration is reused. The pages and revision
 432          *           of iteration > 1 have no corresponding representation in the
 433          *           database.
 434          * @return string absolute filename of the stub
 435          */
 436         private function setUpStub( $fname = null, $iterations = 1 ) {
 437                 if ( $fname === null ) {
 438                         $fname = $this->getNewTempFile();
 439                 }
 440                 $header = '<mediawiki xmlns="http://www.mediawiki.org/xml/export-0.7/" '
 441                         . 'xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" '
 442                         . 'xsi:schemaLocation="http://www.mediawiki.org/xml/export-0.7/ '
 443                         . 'http://www.mediawiki.org/xml/export-0.7.xsd" version="0.7" xml:lang="en">
 444   <siteinfo>
 445     <sitename>wikisvn</sitename>
 446     <base>http://localhost/wiki-svn/index.php/Main_Page</base>
 447     <generator>MediaWiki 1.21alpha</generator>
 448     <case>first-letter</case>
 449     <namespaces>
 450       <namespace key="-2" case="first-letter">Media</namespace>
 451       <namespace key="-1" case="first-letter">Special</namespace>
 452       <namespace key="0" case="first-letter" />
 453       <namespace key="1" case="first-letter">Talk</namespace>
 454       <namespace key="2" case="first-letter">User</namespace>
 455       <namespace key="3" case="first-letter">User talk</namespace>
 456       <namespace key="4" case="first-letter">Wikisvn</namespace>
 457       <namespace key="5" case="first-letter">Wikisvn talk</namespace>
 458       <namespace key="6" case="first-letter">File</namespace>
 459       <namespace key="7" case="first-letter">File talk</namespace>
 460       <namespace key="8" case="first-letter">MediaWiki</namespace>
 461       <namespace key="9" case="first-letter">MediaWiki talk</namespace>
 462       <namespace key="10" case="first-letter">Template</namespace>
 463       <namespace key="11" case="first-letter">Template talk</namespace>
 464       <namespace key="12" case="first-letter">Help</namespace>
 465       <namespace key="13" case="first-letter">Help talk</namespace>
 466       <namespace key="14" case="first-letter">Category</namespace>
 467       <namespace key="15" case="first-letter">Category talk</namespace>
 468     </namespaces>
 469   </siteinfo>
 470 ';
 471                 $tail = '</mediawiki>
 472 ';
 473
 474                 $content = $header;
 475                 $iterations = intval( $iterations );
 476                 for ( $i = 0; $i < $iterations; $i++ ) {
 477
 478                         $page1 = '  <page>
 479     <title>BackupDumperTestP1</title>
 480     <ns>0</ns>
 481     <id>' . ( $this->pageId1 + $i * self::$numOfPages ) . '</id>
 482     <revision>
 483       <id>' . ( $this->revId1_1 + $i * self::$numOfRevs ) . '</id>
 484       <timestamp>2012-04-01T16:46:05Z</timestamp>
 485       <contributor>
 486         <ip>127.0.0.1</ip>
 487       </contributor>
 488       <comment>BackupDumperTestP1Summary1</comment>
 489       <sha1>0bolhl6ol7i6x0e7yq91gxgaan39j87</sha1>
 490       <model>wikitext</model>
 491       <format>text/x-wiki</format>
 492       <text id="' . $this->textId1_1 . '" bytes="23" />
 493     </revision>
 494   </page>
 495 ';
 496                         $page2 = '  <page>
 497     <title>BackupDumperTestP2</title>
 498     <ns>0</ns>
 499     <id>' . ( $this->pageId2 + $i * self::$numOfPages ) . '</id>
 500     <revision>
 501       <id>' . ( $this->revId2_1 + $i * self::$numOfRevs ) . '</id>
 502       <timestamp>2012-04-01T16:46:05Z</timestamp>
 503       <contributor>
 504         <ip>127.0.0.1</ip>
 505       </contributor>
 506       <comment>BackupDumperTestP2Summary1</comment>
 507       <sha1>jprywrymfhysqllua29tj3sc7z39dl2</sha1>
 508       <model>wikitext</model>
 509       <format>text/x-wiki</format>
 510       <text id="' . $this->textId2_1 . '" bytes="23" />
 511     </revision>
 512     <revision>
 513       <id>' . ( $this->revId2_2 + $i * self::$numOfRevs ) . '</id>
 514       <parentid>' . ( $this->revId2_1 + $i * self::$numOfRevs ) . '</parentid>
 515       <timestamp>2012-04-01T16:46:05Z</timestamp>
 516       <contributor>
 517         <ip>127.0.0.1</ip>
 518       </contributor>
 519       <comment>BackupDumperTestP2Summary2</comment>
 520       <sha1>b7vj5ks32po5m1z1t1br4o7scdwwy95</sha1>
 521       <model>wikitext</model>
 522       <format>text/x-wiki</format>
 523       <text id="' . $this->textId2_2 . '" bytes="23" />
 524     </revision>
 525     <revision>
 526       <id>' . ( $this->revId2_3 + $i * self::$numOfRevs ) . '</id>
 527       <parentid>' . ( $this->revId2_2 + $i * self::$numOfRevs ) . '</parentid>
 528       <timestamp>2012-04-01T16:46:05Z</timestamp>
 529       <contributor>
 530         <ip>127.0.0.1</ip>
 531       </contributor>
 532       <comment>BackupDumperTestP2Summary3</comment>
 533       <sha1>jfunqmh1ssfb8rs43r19w98k28gg56r</sha1>
 534       <model>wikitext</model>
 535       <format>text/x-wiki</format>
 536       <text id="' . $this->textId2_3 . '" bytes="23" />
 537     </revision>
 538     <revision>
 539       <id>' . ( $this->revId2_4 + $i * self::$numOfRevs ) . '</id>
 540       <parentid>' . ( $this->revId2_3 + $i * self::$numOfRevs ) . '</parentid>
 541       <timestamp>2012-04-01T16:46:05Z</timestamp>
 542       <contributor>
 543         <ip>127.0.0.1</ip>
 544       </contributor>
 545       <comment>BackupDumperTestP2Summary4 extra</comment>
 546       <sha1>6o1ciaxa6pybnqprmungwofc4lv00wv</sha1>
 547       <model>wikitext</model>
 548       <format>text/x-wiki</format>
 549       <text id="' . $this->textId2_4 . '" bytes="44" />
 550     </revision>
 551   </page>
 552 ';
 553                         // page 3 not in stub
 554
 555                         $page4 = '  <page>
 556     <title>Talk:BackupDumperTestP1</title>
 557     <ns>1</ns>
 558     <id>' . ( $this->pageId4 + $i * self::$numOfPages ) . '</id>
 559     <revision>
 560       <id>' . ( $this->revId4_1 + $i * self::$numOfRevs ) . '</id>
 561       <timestamp>2012-04-01T16:46:05Z</timestamp>
 562       <contributor>
 563         <ip>127.0.0.1</ip>
 564       </contributor>
 565       <comment>Talk BackupDumperTestP1 Summary1</comment>
 566       <sha1>nktofwzd0tl192k3zfepmlzxoax1lpe</sha1>
 567       <model>wikitext</model>
 568       <format>text/x-wiki</format>
 569       <text id="' . $this->textId4_1 . '" bytes="35" />
 570     </revision>
 571   </page>
 572 ';
 573                         $content .= $page1 . $page2 . $page4;
 574                 }
 575                 $content .= $tail;
 576                 $this->assertEquals( strlen( $content ), file_put_contents(
 577                         $fname, $content ), "Length of prepared stub" );
 578
 579                 return $fname;
 580         }
 581 }