tests/phpunit/includes/api/ApiMainTest.php

   1 <?php
   2
   3 /**
   4  * @group API
   5  * @group medium
   6  *
   7  * @covers ApiMain
   8  */
   9 class ApiMainTest extends ApiTestCase {
  10
  11         /**
  12          * Test that the API will accept a FauxRequest and execute.
  13          */
  14         public function testApi() {
  15                 $api = new ApiMain(
  16                         new FauxRequest( [ 'action' => 'query', 'meta' => 'siteinfo' ] )
  17                 );
  18                 $api->execute();
  19                 $data = $api->getResult()->getResultData();
  20                 $this->assertInternalType( 'array', $data );
  21                 $this->assertArrayHasKey( 'query', $data );
  22         }
  23
  24         public static function provideAssert() {
  25                 return [
  26                         [ false, [], 'user', 'assertuserfailed' ],
  27                         [ true, [], 'user', false ],
  28                         [ true, [], 'bot', 'assertbotfailed' ],
  29                         [ true, [ 'bot' ], 'user', false ],
  30                         [ true, [ 'bot' ], 'bot', false ],
  31                 ];
  32         }
  33
  34         /**
  35          * Tests the assert={user|bot} functionality
  36          *
  37          * @covers ApiMain::checkAsserts
  38          * @dataProvider provideAssert
  39          * @param bool $registered
  40          * @param array $rights
  41          * @param string $assert
  42          * @param string|bool $error False if no error expected
  43          */
  44         public function testAssert( $registered, $rights, $assert, $error ) {
  45                 $user = new User();
  46                 if ( $registered ) {
  47                         $user->setId( 1 );
  48                 }
  49                 $user->mRights = $rights;
  50                 try {
  51                         $this->doApiRequest( [
  52                                 'action' => 'query',
  53                                 'assert' => $assert,
  54                         ], null, null, $user );
  55                         $this->assertFalse( $error ); // That no error was expected
  56                 } catch ( ApiUsageException $e ) {
  57                         $this->assertTrue( self::apiExceptionHasCode( $e, $error ) );
  58                 }
  59         }
  60
  61         /**
  62          * Tests the assertuser= functionality
  63          *
  64          * @covers ApiMain::checkAsserts
  65          */
  66         public function testAssertUser() {
  67                 $user = $this->getTestUser()->getUser();
  68                 $this->doApiRequest( [
  69                         'action' => 'query',
  70                         'assertuser' => $user->getName(),
  71                 ], null, null, $user );
  72
  73                 try {
  74                         $this->doApiRequest( [
  75                                 'action' => 'query',
  76                                 'assertuser' => $user->getName() . 'X',
  77                         ], null, null, $user );
  78                         $this->fail( 'Expected exception not thrown' );
  79                 } catch ( ApiUsageException $e ) {
  80                         $this->assertTrue( self::apiExceptionHasCode( $e, 'assertnameduserfailed' ) );
  81                 }
  82         }
  83
  84         /**
  85          * Test if all classes in the main module manager exists
  86          */
  87         public function testClassNamesInModuleManager() {
  88                 $api = new ApiMain(
  89                         new FauxRequest( [ 'action' => 'query', 'meta' => 'siteinfo' ] )
  90                 );
  91                 $modules = $api->getModuleManager()->getNamesWithClasses();
  92
  93                 foreach ( $modules as $name => $class ) {
  94                         $this->assertTrue(
  95                                 class_exists( $class ),
  96                                 'Class ' . $class . ' for api module ' . $name . ' does not exist (with exact case)'
  97                         );
  98                 }
  99         }
 100
 101         /**
 102          * Test HTTP precondition headers
 103          *
 104          * @covers ApiMain::checkConditionalRequestHeaders
 105          * @dataProvider provideCheckConditionalRequestHeaders
 106          * @param array $headers HTTP headers
 107          * @param array $conditions Return data for ApiBase::getConditionalRequestData
 108          * @param int $status Expected response status
 109          * @param bool $post Request is a POST
 110          */
 111         public function testCheckConditionalRequestHeaders(
 112                 $headers, $conditions, $status, $post = false
 113         ) {
 114                 $request = new FauxRequest( [ 'action' => 'query', 'meta' => 'siteinfo' ], $post );
 115                 $request->setHeaders( $headers );
 116                 $request->response()->statusHeader( 200 ); // Why doesn't it default?
 117
 118                 $context = $this->apiContext->newTestContext( $request, null );
 119                 $api = new ApiMain( $context );
 120                 $priv = TestingAccessWrapper::newFromObject( $api );
 121                 $priv->mInternalMode = false;
 122
 123                 $module = $this->getMockBuilder( 'ApiBase' )
 124                         ->setConstructorArgs( [ $api, 'mock' ] )
 125                         ->setMethods( [ 'getConditionalRequestData' ] )
 126                         ->getMockForAbstractClass();
 127                 $module->expects( $this->any() )
 128                         ->method( 'getConditionalRequestData' )
 129                         ->will( $this->returnCallback( function ( $condition ) use ( $conditions ) {
 130                                 return isset( $conditions[$condition] ) ? $conditions[$condition] : null;
 131                         } ) );
 132
 133                 $ret = $priv->checkConditionalRequestHeaders( $module );
 134
 135                 $this->assertSame( $status, $request->response()->getStatusCode() );
 136                 $this->assertSame( $status === 200, $ret );
 137         }
 138
 139         public static function provideCheckConditionalRequestHeaders() {
 140                 $now = time();
 141
 142                 return [
 143                         // Non-existing from module is ignored
 144                         [ [ 'If-None-Match' => '"foo", "bar"' ], [], 200 ],
 145                         [ [ 'If-Modified-Since' => 'Tue, 18 Aug 2015 00:00:00 GMT' ], [], 200 ],
 146
 147                         // No headers
 148                         [
 149                                 [],
 150                                 [
 151                                         'etag' => '""',
 152                                         'last-modified' => '20150815000000',
 153                                 ],
 154                                 200
 155                         ],
 156
 157                         // Basic If-None-Match
 158                         [ [ 'If-None-Match' => '"foo", "bar"' ], [ 'etag' => '"bar"' ], 304 ],
 159                         [ [ 'If-None-Match' => '"foo", "bar"' ], [ 'etag' => '"baz"' ], 200 ],
 160                         [ [ 'If-None-Match' => '"foo"' ], [ 'etag' => 'W/"foo"' ], 304 ],
 161                         [ [ 'If-None-Match' => 'W/"foo"' ], [ 'etag' => '"foo"' ], 304 ],
 162                         [ [ 'If-None-Match' => 'W/"foo"' ], [ 'etag' => 'W/"foo"' ], 304 ],
 163
 164                         // Pointless, but supported
 165                         [ [ 'If-None-Match' => '*' ], [], 304 ],
 166
 167                         // Basic If-Modified-Since
 168                         [ [ 'If-Modified-Since' => wfTimestamp( TS_RFC2822, $now ) ],
 169                                 [ 'last-modified' => wfTimestamp( TS_MW, $now - 1 ) ], 304 ],
 170                         [ [ 'If-Modified-Since' => wfTimestamp( TS_RFC2822, $now ) ],
 171                                 [ 'last-modified' => wfTimestamp( TS_MW, $now ) ], 304 ],
 172                         [ [ 'If-Modified-Since' => wfTimestamp( TS_RFC2822, $now ) ],
 173                                 [ 'last-modified' => wfTimestamp( TS_MW, $now + 1 ) ], 200 ],
 174
 175                         // If-Modified-Since ignored when If-None-Match is given too
 176                         [ [ 'If-None-Match' => '""', 'If-Modified-Since' => wfTimestamp( TS_RFC2822, $now ) ],
 177                                 [ 'etag' => '"x"', 'last-modified' => wfTimestamp( TS_MW, $now - 1 ) ], 200 ],
 178                         [ [ 'If-None-Match' => '""', 'If-Modified-Since' => wfTimestamp( TS_RFC2822, $now ) ],
 179                                 [ 'last-modified' => wfTimestamp( TS_MW, $now - 1 ) ], 304 ],
 180
 181                         // Ignored for POST
 182                         [ [ 'If-None-Match' => '"foo", "bar"' ], [ 'etag' => '"bar"' ], 200, true ],
 183                         [ [ 'If-Modified-Since' => wfTimestamp( TS_RFC2822, $now ) ],
 184                                 [ 'last-modified' => wfTimestamp( TS_MW, $now - 1 ) ], 200, true ],
 185
 186                         // Other date formats allowed by the RFC
 187                         [ [ 'If-Modified-Since' => gmdate( 'l, d-M-y H:i:s', $now ) . ' GMT' ],
 188                                 [ 'last-modified' => wfTimestamp( TS_MW, $now - 1 ) ], 304 ],
 189                         [ [ 'If-Modified-Since' => gmdate( 'D M j H:i:s Y', $now ) ],
 190                                 [ 'last-modified' => wfTimestamp( TS_MW, $now - 1 ) ], 304 ],
 191
 192                         // Old browser extension to HTTP/1.0
 193                         [ [ 'If-Modified-Since' => wfTimestamp( TS_RFC2822, $now ) . '; length=123' ],
 194                                 [ 'last-modified' => wfTimestamp( TS_MW, $now - 1 ) ], 304 ],
 195
 196                         // Invalid date formats should be ignored
 197                         [ [ 'If-Modified-Since' => gmdate( 'Y-m-d H:i:s', $now ) . ' GMT' ],
 198                                 [ 'last-modified' => wfTimestamp( TS_MW, $now - 1 ) ], 200 ],
 199                 ];
 200         }
 201
 202         /**
 203          * Test conditional headers output
 204          * @dataProvider provideConditionalRequestHeadersOutput
 205          * @param array $conditions Return data for ApiBase::getConditionalRequestData
 206          * @param array $headers Expected output headers
 207          * @param bool $isError $isError flag
 208          * @param bool $post Request is a POST
 209          */
 210         public function testConditionalRequestHeadersOutput(
 211                 $conditions, $headers, $isError = false, $post = false
 212         ) {
 213                 $request = new FauxRequest( [ 'action' => 'query', 'meta' => 'siteinfo' ], $post );
 214                 $response = $request->response();
 215
 216                 $api = new ApiMain( $request );
 217                 $priv = TestingAccessWrapper::newFromObject( $api );
 218                 $priv->mInternalMode = false;
 219
 220                 $module = $this->getMockBuilder( 'ApiBase' )
 221                         ->setConstructorArgs( [ $api, 'mock' ] )
 222                         ->setMethods( [ 'getConditionalRequestData' ] )
 223                         ->getMockForAbstractClass();
 224                 $module->expects( $this->any() )
 225                         ->method( 'getConditionalRequestData' )
 226                         ->will( $this->returnCallback( function ( $condition ) use ( $conditions ) {
 227                                 return isset( $conditions[$condition] ) ? $conditions[$condition] : null;
 228                         } ) );
 229                 $priv->mModule = $module;
 230
 231                 $priv->sendCacheHeaders( $isError );
 232
 233                 foreach ( [ 'Last-Modified', 'ETag' ] as $header ) {
 234                         $this->assertEquals(
 235                                 isset( $headers[$header] ) ? $headers[$header] : null,
 236                                 $response->getHeader( $header ),
 237                                 $header
 238                         );
 239                 }
 240         }
 241
 242         public static function provideConditionalRequestHeadersOutput() {
 243                 return [
 244                         [
 245                                 [],
 246                                 []
 247                         ],
 248                         [
 249                                 [ 'etag' => '"foo"' ],
 250                                 [ 'ETag' => '"foo"' ]
 251                         ],
 252                         [
 253                                 [ 'last-modified' => '20150818000102' ],
 254                                 [ 'Last-Modified' => 'Tue, 18 Aug 2015 00:01:02 GMT' ]
 255                         ],
 256                         [
 257                                 [ 'etag' => '"foo"', 'last-modified' => '20150818000102' ],
 258                                 [ 'ETag' => '"foo"', 'Last-Modified' => 'Tue, 18 Aug 2015 00:01:02 GMT' ]
 259                         ],
 260                         [
 261                                 [ 'etag' => '"foo"', 'last-modified' => '20150818000102' ],
 262                                 [],
 263                                 true,
 264                         ],
 265                         [
 266                                 [ 'etag' => '"foo"', 'last-modified' => '20150818000102' ],
 267                                 [],
 268                                 false,
 269                                 true,
 270                         ],
 271                 ];
 272         }
 273
 274         /**
 275          * @covers ApiMain::lacksSameOriginSecurity
 276          */
 277         public function testLacksSameOriginSecurity() {
 278                 // Basic test
 279                 $main = new ApiMain( new FauxRequest( [ 'action' => 'query', 'meta' => 'siteinfo' ] ) );
 280                 $this->assertFalse( $main->lacksSameOriginSecurity(), 'Basic test, should have security' );
 281
 282                 // JSONp
 283                 $main = new ApiMain(
 284                         new FauxRequest( [ 'action' => 'query', 'format' => 'xml', 'callback' => 'foo' ] )
 285                 );
 286                 $this->assertTrue( $main->lacksSameOriginSecurity(), 'JSONp, should lack security' );
 287
 288                 // Header
 289                 $request = new FauxRequest( [ 'action' => 'query', 'meta' => 'siteinfo' ] );
 290                 $request->setHeader( 'TrEaT-As-UnTrUsTeD', '' ); // With falsey value!
 291                 $main = new ApiMain( $request );
 292                 $this->assertTrue( $main->lacksSameOriginSecurity(), 'Header supplied, should lack security' );
 293
 294                 // Hook
 295                 $this->mergeMwGlobalArrayValue( 'wgHooks', [
 296                         'RequestHasSameOriginSecurity' => [ function () {
 297                                 return false;
 298                         } ]
 299                 ] );
 300                 $main = new ApiMain( new FauxRequest( [ 'action' => 'query', 'meta' => 'siteinfo' ] ) );
 301                 $this->assertTrue( $main->lacksSameOriginSecurity(), 'Hook, should lack security' );
 302         }
 303
 304         /**
 305          * Test proper creation of the ApiErrorFormatter
 306          * @covers ApiMain::__construct
 307          * @dataProvider provideApiErrorFormatterCreation
 308          * @param array $request Request parameters
 309          * @param array $expect Expected data
 310          *  - uselang: ApiMain language
 311          *  - class: ApiErrorFormatter class
 312          *  - lang: ApiErrorFormatter language
 313          *  - format: ApiErrorFormatter format
 314          *  - usedb: ApiErrorFormatter use-database flag
 315          */
 316         public function testApiErrorFormatterCreation( array $request, array $expect ) {
 317                 $context = new RequestContext();
 318                 $context->setRequest( new FauxRequest( $request ) );
 319                 $context->setLanguage( 'ru' );
 320
 321                 $main = new ApiMain( $context );
 322                 $formatter = $main->getErrorFormatter();
 323                 $wrappedFormatter = TestingAccessWrapper::newFromObject( $formatter );
 324
 325                 $this->assertSame( $expect['uselang'], $main->getLanguage()->getCode() );
 326                 $this->assertInstanceOf( $expect['class'], $formatter );
 327                 $this->assertSame( $expect['lang'], $formatter->getLanguage()->getCode() );
 328                 $this->assertSame( $expect['format'], $wrappedFormatter->format );
 329                 $this->assertSame( $expect['usedb'], $wrappedFormatter->useDB );
 330         }
 331
 332         public static function provideApiErrorFormatterCreation() {
 333                 global $wgContLang;
 334
 335                 return [
 336                         'Default (BC)' => [ [], [
 337                                 'uselang' => 'ru',
 338                                 'class' => ApiErrorFormatter_BackCompat::class,
 339                                 'lang' => 'en',
 340                                 'format' => 'none',
 341                                 'usedb' => false,
 342                         ] ],
 343                         'BC ignores fields' => [ [ 'errorlang' => 'de', 'errorsuselocal' => 1 ], [
 344                                 'uselang' => 'ru',
 345                                 'class' => ApiErrorFormatter_BackCompat::class,
 346                                 'lang' => 'en',
 347                                 'format' => 'none',
 348                                 'usedb' => false,
 349                         ] ],
 350                         'Explicit BC' => [ [ 'errorformat' => 'bc' ], [
 351                                 'uselang' => 'ru',
 352                                 'class' => ApiErrorFormatter_BackCompat::class,
 353                                 'lang' => 'en',
 354                                 'format' => 'none',
 355                                 'usedb' => false,
 356                         ] ],
 357                         'Basic' => [ [ 'errorformat' => 'wikitext' ], [
 358                                 'uselang' => 'ru',
 359                                 'class' => ApiErrorFormatter::class,
 360                                 'lang' => 'ru',
 361                                 'format' => 'wikitext',
 362                                 'usedb' => false,
 363                         ] ],
 364                         'Follows uselang' => [ [ 'uselang' => 'fr', 'errorformat' => 'plaintext' ], [
 365                                 'uselang' => 'fr',
 366                                 'class' => ApiErrorFormatter::class,
 367                                 'lang' => 'fr',
 368                                 'format' => 'plaintext',
 369                                 'usedb' => false,
 370                         ] ],
 371                         'Explicitly follows uselang' => [
 372                                 [ 'uselang' => 'fr', 'errorlang' => 'uselang', 'errorformat' => 'plaintext' ],
 373                                 [
 374                                         'uselang' => 'fr',
 375                                         'class' => ApiErrorFormatter::class,
 376                                         'lang' => 'fr',
 377                                         'format' => 'plaintext',
 378                                         'usedb' => false,
 379                                 ]
 380                         ],
 381                         'uselang=content' => [
 382                                 [ 'uselang' => 'content', 'errorformat' => 'plaintext' ],
 383                                 [
 384                                         'uselang' => $wgContLang->getCode(),
 385                                         'class' => ApiErrorFormatter::class,
 386                                         'lang' => $wgContLang->getCode(),
 387                                         'format' => 'plaintext',
 388                                         'usedb' => false,
 389                                 ]
 390                         ],
 391                         'errorlang=content' => [
 392                                 [ 'errorlang' => 'content', 'errorformat' => 'plaintext' ],
 393                                 [
 394                                         'uselang' => 'ru',
 395                                         'class' => ApiErrorFormatter::class,
 396                                         'lang' => $wgContLang->getCode(),
 397                                         'format' => 'plaintext',
 398                                         'usedb' => false,
 399                                 ]
 400                         ],
 401                         'Explicit parameters' => [
 402                                 [ 'errorlang' => 'de', 'errorformat' => 'html', 'errorsuselocal' => 1 ],
 403                                 [
 404                                         'uselang' => 'ru',
 405                                         'class' => ApiErrorFormatter::class,
 406                                         'lang' => 'de',
 407                                         'format' => 'html',
 408                                         'usedb' => true,
 409                                 ]
 410                         ],
 411                         'Explicit parameters override uselang' => [
 412                                 [ 'errorlang' => 'de', 'uselang' => 'fr', 'errorformat' => 'raw' ],
 413                                 [
 414                                         'uselang' => 'fr',
 415                                         'class' => ApiErrorFormatter::class,
 416                                         'lang' => 'de',
 417                                         'format' => 'raw',
 418                                         'usedb' => false,
 419                                 ]
 420                         ],
 421                         'Bogus language doesn\'t explode' => [
 422                                 [ 'errorlang' => '<bogus1>', 'uselang' => '<bogus2>', 'errorformat' => 'none' ],
 423                                 [
 424                                         'uselang' => 'en',
 425                                         'class' => ApiErrorFormatter::class,
 426                                         'lang' => 'en',
 427                                         'format' => 'none',
 428                                         'usedb' => false,
 429                                 ]
 430                         ],
 431                         'Bogus format doesn\'t explode' => [ [ 'errorformat' => 'bogus' ], [
 432                                 'uselang' => 'ru',
 433                                 'class' => ApiErrorFormatter_BackCompat::class,
 434                                 'lang' => 'en',
 435                                 'format' => 'none',
 436                                 'usedb' => false,
 437                         ] ],
 438                 ];
 439         }
 440
 441         /**
 442          * @covers ApiMain::errorMessagesFromException
 443          * @covers ApiMain::substituteResultWithError
 444          * @dataProvider provideExceptionErrors
 445          * @param Exception $exception
 446          * @param array $expectReturn
 447          * @param array $expectResult
 448          */
 449         public function testExceptionErrors( $error, $expectReturn, $expectResult ) {
 450                 $context = new RequestContext();
 451                 $context->setRequest( new FauxRequest( [ 'errorformat' => 'plaintext' ] ) );
 452                 $context->setLanguage( 'en' );
 453                 $context->setConfig( new MultiConfig( [
 454                         new HashConfig( [
 455                                 'ShowHostnames' => true, 'ShowSQLErrors' => false,
 456                                 'ShowExceptionDetails' => true, 'ShowDBErrorBacktrace' => true,
 457                         ] ),
 458                         $context->getConfig()
 459                 ] ) );
 460
 461                 $main = new ApiMain( $context );
 462                 $main->addWarning( new RawMessage( 'existing warning' ), 'existing-warning' );
 463                 $main->addError( new RawMessage( 'existing error' ), 'existing-error' );
 464
 465                 $ret = TestingAccessWrapper::newFromObject( $main )->substituteResultWithError( $error );
 466                 $this->assertSame( $expectReturn, $ret );
 467
 468                 // PHPUnit sometimes adds some SplObjectStorage garbage to the arrays,
 469                 // so let's try ->assertEquals().
 470                 $this->assertEquals(
 471                         $expectResult,
 472                         $main->getResult()->getResultData( [], [ 'Strip' => 'all' ] )
 473                 );
 474         }
 475
 476         // Not static so $this->getMock() can be used
 477         public function provideExceptionErrors() {
 478                 $reqId = WebRequest::getRequestId();
 479                 $doclink = wfExpandUrl( wfScript( 'api' ) );
 480
 481                 $ex = new InvalidArgumentException( 'Random exception' );
 482                 $trace = wfMessage( 'api-exception-trace',
 483                         get_class( $ex ),
 484                         $ex->getFile(),
 485                         $ex->getLine(),
 486                         MWExceptionHandler::getRedactedTraceAsString( $ex )
 487                 )->inLanguage( 'en' )->useDatabase( false )->text();
 488
 489                 $dbex = new DBQueryError( $this->getMock( 'IDatabase' ), 'error', 1234, 'SELECT 1', __METHOD__ );
 490                 $dbtrace = wfMessage( 'api-exception-trace',
 491                         get_class( $dbex ),
 492                         $dbex->getFile(),
 493                         $dbex->getLine(),
 494                         MWExceptionHandler::getRedactedTraceAsString( $dbex )
 495                 )->inLanguage( 'en' )->useDatabase( false )->text();
 496
 497                 $apiEx1 = new ApiUsageException( null,
 498                         StatusValue::newFatal( new ApiRawMessage( 'An error', 'sv-error1' ) ) );
 499                 TestingAccessWrapper::newFromObject( $apiEx1 )->modulePath = 'foo+bar';
 500                 $apiEx1->getStatusValue()->warning( new ApiRawMessage( 'A warning', 'sv-warn1' ) );
 501                 $apiEx1->getStatusValue()->warning( new ApiRawMessage( 'Another warning', 'sv-warn2' ) );
 502                 $apiEx1->getStatusValue()->fatal( new ApiRawMessage( 'Another error', 'sv-error2' ) );
 503
 504                 return [
 505                         [
 506                                 $ex,
 507                                 [ 'existing-error', 'internal_api_error_InvalidArgumentException' ],
 508                                 [
 509                                         'warnings' => [
 510                                                 [ 'code' => 'existing-warning', 'text' => 'existing warning', 'module' => 'main' ],
 511                                         ],
 512                                         'errors' => [
 513                                                 [ 'code' => 'existing-error', 'text' => 'existing error', 'module' => 'main' ],
 514                                                 [
 515                                                         'code' => 'internal_api_error_InvalidArgumentException',
 516                                                         'text' => "[$reqId] Exception caught: Random exception",
 517                                                 ]
 518                                         ],
 519                                         'trace' => $trace,
 520                                         'servedby' => wfHostname(),
 521                                 ]
 522                         ],
 523                         [
 524                                 $dbex,
 525                                 [ 'existing-error', 'internal_api_error_DBQueryError' ],
 526                                 [
 527                                         'warnings' => [
 528                                                 [ 'code' => 'existing-warning', 'text' => 'existing warning', 'module' => 'main' ],
 529                                         ],
 530                                         'errors' => [
 531                                                 [ 'code' => 'existing-error', 'text' => 'existing error', 'module' => 'main' ],
 532                                                 [
 533                                                         'code' => 'internal_api_error_DBQueryError',
 534                                                         'text' => "[$reqId] Database query error.",
 535                                                 ]
 536                                         ],
 537                                         'trace' => $dbtrace,
 538                                         'servedby' => wfHostname(),
 539                                 ]
 540                         ],
 541                         [
 542                                 new UsageException( 'Usage exception!', 'ue', 0, [ 'foo' => 'bar' ] ),
 543                                 [ 'existing-error', 'ue' ],
 544                                 [
 545                                         'warnings' => [
 546                                                 [ 'code' => 'existing-warning', 'text' => 'existing warning', 'module' => 'main' ],
 547                                         ],
 548                                         'errors' => [
 549                                                 [ 'code' => 'existing-error', 'text' => 'existing error', 'module' => 'main' ],
 550                                                 [ 'code' => 'ue', 'text' => "Usage exception!", 'data' => [ 'foo' => 'bar' ] ]
 551                                         ],
 552                                         'docref' => "See $doclink for API usage. Subscribe to the mediawiki-api-announce mailing " .
 553                                                 "list at &lt;https://lists.wikimedia.org/mailman/listinfo/mediawiki-api-announce&gt; " .
 554                                                 "for notice of API deprecations and breaking changes.",
 555                                         'servedby' => wfHostname(),
 556                                 ]
 557                         ],
 558                         [
 559                                 $apiEx1,
 560                                 [ 'existing-error', 'sv-error1', 'sv-error2' ],
 561                                 [
 562                                         'warnings' => [
 563                                                 [ 'code' => 'existing-warning', 'text' => 'existing warning', 'module' => 'main' ],
 564                                                 [ 'code' => 'sv-warn1', 'text' => 'A warning', 'module' => 'foo+bar' ],
 565                                                 [ 'code' => 'sv-warn2', 'text' => 'Another warning', 'module' => 'foo+bar' ],
 566                                         ],
 567                                         'errors' => [
 568                                                 [ 'code' => 'existing-error', 'text' => 'existing error', 'module' => 'main' ],
 569                                                 [ 'code' => 'sv-error1', 'text' => 'An error', 'module' => 'foo+bar' ],
 570                                                 [ 'code' => 'sv-error2', 'text' => 'Another error', 'module' => 'foo+bar' ],
 571                                         ],
 572                                         'docref' => "See $doclink for API usage. Subscribe to the mediawiki-api-announce mailing " .
 573                                                 "list at &lt;https://lists.wikimedia.org/mailman/listinfo/mediawiki-api-announce&gt; " .
 574                                                 "for notice of API deprecations and breaking changes.",
 575                                         'servedby' => wfHostname(),
 576                                 ]
 577                         ],
 578                 ];
 579         }
 580 }