tests/phpunit/includes/libs/objectcache/WANObjectCacheTest.php

   1 <?php
   2
   3 use Wikimedia\TestingAccessWrapper;
   4
   5 class WANObjectCacheTest extends PHPUnit_Framework_TestCase  {
   6         /** @var WANObjectCache */
   7         private $cache;
   8         /**@var BagOStuff */
   9         private $internalCache;
  10
  11         protected function setUp() {
  12                 parent::setUp();
  13
  14                 $this->cache = new WANObjectCache( [
  15                         'cache' => new HashBagOStuff(),
  16                         'pool' => 'testcache-hash',
  17                         'relayer' => new EventRelayerNull( [] )
  18                 ] );
  19
  20                 $wanCache = TestingAccessWrapper::newFromObject( $this->cache );
  21                 /** @noinspection PhpUndefinedFieldInspection */
  22                 $this->internalCache = $wanCache->cache;
  23         }
  24
  25         /**
  26          * @dataProvider provideSetAndGet
  27          * @covers WANObjectCache::set()
  28          * @covers WANObjectCache::get()
  29          * @covers WANObjectCache::makeKey()
  30          * @param mixed $value
  31          * @param integer $ttl
  32          */
  33         public function testSetAndGet( $value, $ttl ) {
  34                 $curTTL = null;
  35                 $asOf = null;
  36                 $key = $this->cache->makeKey( 'x', wfRandomString() );
  37
  38                 $this->cache->get( $key, $curTTL, [], $asOf );
  39                 $this->assertNull( $curTTL, "Current TTL is null" );
  40                 $this->assertNull( $asOf, "Current as-of-time is infinite" );
  41
  42                 $t = microtime( true );
  43                 $this->cache->set( $key, $value, $ttl );
  44
  45                 $this->assertEquals( $value, $this->cache->get( $key, $curTTL, [], $asOf ) );
  46                 if ( is_infinite( $ttl ) || $ttl == 0 ) {
  47                         $this->assertTrue( is_infinite( $curTTL ), "Current TTL is infinite" );
  48                 } else {
  49                         $this->assertGreaterThan( 0, $curTTL, "Current TTL > 0" );
  50                         $this->assertLessThanOrEqual( $ttl, $curTTL, "Current TTL < nominal TTL" );
  51                 }
  52                 $this->assertGreaterThanOrEqual( $t - 1, $asOf, "As-of-time in range of set() time" );
  53                 $this->assertLessThanOrEqual( $t + 1, $asOf, "As-of-time in range of set() time" );
  54         }
  55
  56         public static function provideSetAndGet() {
  57                 return [
  58                         [ 14141, 3 ],
  59                         [ 3535.666, 3 ],
  60                         [ [], 3 ],
  61                         [ null, 3 ],
  62                         [ '0', 3 ],
  63                         [ (object)[ 'meow' ], 3 ],
  64                         [ INF, 3 ],
  65                         [ '', 3 ],
  66                         [ 'pizzacat', INF ],
  67                 ];
  68         }
  69
  70         /**
  71          * @covers WANObjectCache::get()
  72          * @covers WANObjectCache::makeGlobalKey()
  73          */
  74         public function testGetNotExists() {
  75                 $key = $this->cache->makeGlobalKey( 'y', wfRandomString(), 'p' );
  76                 $curTTL = null;
  77                 $value = $this->cache->get( $key, $curTTL );
  78
  79                 $this->assertFalse( $value, "Non-existing key has false value" );
  80                 $this->assertNull( $curTTL, "Non-existing key has null current TTL" );
  81         }
  82
  83         /**
  84          * @covers WANObjectCache::set()
  85          */
  86         public function testSetOver() {
  87                 $key = wfRandomString();
  88                 for ( $i = 0; $i < 3; ++$i ) {
  89                         $value = wfRandomString();
  90                         $this->cache->set( $key, $value, 3 );
  91
  92                         $this->assertEquals( $this->cache->get( $key ), $value );
  93                 }
  94         }
  95
  96         /**
  97          * @covers WANObjectCache::set()
  98          */
  99         public function testStaleSet() {
 100                 $key = wfRandomString();
 101                 $value = wfRandomString();
 102                 $this->cache->set( $key, $value, 3, [ 'since' => microtime( true ) - 30 ] );
 103
 104                 $this->assertFalse( $this->cache->get( $key ), "Stale set() value ignored" );
 105         }
 106
 107         public function testProcessCache() {
 108                 $hit = 0;
 109                 $callback = function () use ( &$hit ) {
 110                         ++$hit;
 111                         return 42;
 112                 };
 113                 $keys = [ wfRandomString(), wfRandomString(), wfRandomString() ];
 114                 $groups = [ 'thiscache:1', 'thatcache:1', 'somecache:1' ];
 115
 116                 foreach ( $keys as $i => $key ) {
 117                         $this->cache->getWithSetCallback(
 118                                 $key, 100, $callback, [ 'pcTTL' => 5, 'pcGroup' => $groups[$i] ] );
 119                 }
 120                 $this->assertEquals( 3, $hit );
 121
 122                 foreach ( $keys as $i => $key ) {
 123                         $this->cache->getWithSetCallback(
 124                                 $key, 100, $callback, [ 'pcTTL' => 5, 'pcGroup' => $groups[$i] ] );
 125                 }
 126                 $this->assertEquals( 3, $hit, "Values cached" );
 127
 128                 foreach ( $keys as $i => $key ) {
 129                         $this->cache->getWithSetCallback(
 130                                 "$key-2", 100, $callback, [ 'pcTTL' => 5, 'pcGroup' => $groups[$i] ] );
 131                 }
 132                 $this->assertEquals( 6, $hit );
 133
 134                 foreach ( $keys as $i => $key ) {
 135                         $this->cache->getWithSetCallback(
 136                                 "$key-2", 100, $callback, [ 'pcTTL' => 5, 'pcGroup' => $groups[$i] ] );
 137                 }
 138                 $this->assertEquals( 6, $hit, "New values cached" );
 139
 140                 foreach ( $keys as $i => $key ) {
 141                         $this->cache->delete( $key );
 142                         $this->cache->getWithSetCallback(
 143                                 $key, 100, $callback, [ 'pcTTL' => 5, 'pcGroup' => $groups[$i] ] );
 144                 }
 145                 $this->assertEquals( 9, $hit, "Values evicted" );
 146
 147                 $key = reset( $keys );
 148                 // Get into cache
 149                 $this->cache->getWithSetCallback( $key, 100, $callback, [ 'pcTTL' => 5 ] );
 150                 $this->cache->getWithSetCallback( $key, 100, $callback, [ 'pcTTL' => 5 ] );
 151                 $this->assertEquals( 10, $hit, "Value cached" );
 152                 $outerCallback = function () use ( &$callback, $key ) {
 153                         $v = $this->cache->getWithSetCallback( $key, 100, $callback, [ 'pcTTL' => 5 ] );
 154
 155                         return 43 + $v;
 156                 };
 157                 $this->cache->getWithSetCallback( $key, 100, $outerCallback );
 158                 $this->assertEquals( 11, $hit, "Nested callback value process cache skipped" );
 159         }
 160
 161         /**
 162          * @dataProvider getWithSetCallback_provider
 163          * @covers WANObjectCache::getWithSetCallback()
 164          * @covers WANObjectCache::doGetWithSetCallback()
 165          * @param array $extOpts
 166          * @param bool $versioned
 167          */
 168         public function testGetWithSetCallback( array $extOpts, $versioned ) {
 169                 $cache = $this->cache;
 170
 171                 $key = wfRandomString();
 172                 $value = wfRandomString();
 173                 $cKey1 = wfRandomString();
 174                 $cKey2 = wfRandomString();
 175
 176                 $priorValue = null;
 177                 $priorAsOf = null;
 178                 $wasSet = 0;
 179                 $func = function( $old, &$ttl, &$opts, $asOf )
 180                 use ( &$wasSet, &$priorValue, &$priorAsOf, $value )
 181                 {
 182                         ++$wasSet;
 183                         $priorValue = $old;
 184                         $priorAsOf = $asOf;
 185                         $ttl = 20; // override with another value
 186                         return $value;
 187                 };
 188
 189                 $wasSet = 0;
 190                 $v = $cache->getWithSetCallback( $key, 30, $func, [ 'lockTSE' => 5 ] + $extOpts );
 191                 $this->assertEquals( $value, $v, "Value returned" );
 192                 $this->assertEquals( 1, $wasSet, "Value regenerated" );
 193                 $this->assertFalse( $priorValue, "No prior value" );
 194                 $this->assertNull( $priorAsOf, "No prior value" );
 195
 196                 $curTTL = null;
 197                 $cache->get( $key, $curTTL );
 198                 $this->assertLessThanOrEqual( 20, $curTTL, 'Current TTL between 19-20 (overriden)' );
 199                 $this->assertGreaterThanOrEqual( 19, $curTTL, 'Current TTL between 19-20 (overriden)' );
 200
 201                 $wasSet = 0;
 202                 $v = $cache->getWithSetCallback( $key, 30, $func, [
 203                                 'lowTTL' => 0,
 204                                 'lockTSE' => 5,
 205                         ] + $extOpts );
 206                 $this->assertEquals( $value, $v, "Value returned" );
 207                 $this->assertEquals( 0, $wasSet, "Value not regenerated" );
 208
 209                 $priorTime = microtime( true );
 210                 usleep( 1 );
 211                 $wasSet = 0;
 212                 $v = $cache->getWithSetCallback(
 213                         $key, 30, $func, [ 'checkKeys' => [ $cKey1, $cKey2 ] ] + $extOpts
 214                 );
 215                 $this->assertEquals( $value, $v, "Value returned" );
 216                 $this->assertEquals( 1, $wasSet, "Value regenerated due to check keys" );
 217                 $this->assertEquals( $value, $priorValue, "Has prior value" );
 218                 $this->assertInternalType( 'float', $priorAsOf, "Has prior value" );
 219                 $t1 = $cache->getCheckKeyTime( $cKey1 );
 220                 $this->assertGreaterThanOrEqual( $priorTime, $t1, 'Check keys generated on miss' );
 221                 $t2 = $cache->getCheckKeyTime( $cKey2 );
 222                 $this->assertGreaterThanOrEqual( $priorTime, $t2, 'Check keys generated on miss' );
 223
 224                 $priorTime = microtime( true );
 225                 $wasSet = 0;
 226                 $v = $cache->getWithSetCallback(
 227                         $key, 30, $func, [ 'checkKeys' => [ $cKey1, $cKey2 ] ] + $extOpts
 228                 );
 229                 $this->assertEquals( $value, $v, "Value returned" );
 230                 $this->assertEquals( 1, $wasSet, "Value regenerated due to still-recent check keys" );
 231                 $t1 = $cache->getCheckKeyTime( $cKey1 );
 232                 $this->assertLessThanOrEqual( $priorTime, $t1, 'Check keys did not change again' );
 233                 $t2 = $cache->getCheckKeyTime( $cKey2 );
 234                 $this->assertLessThanOrEqual( $priorTime, $t2, 'Check keys did not change again' );
 235
 236                 $curTTL = null;
 237                 $v = $cache->get( $key, $curTTL, [ $cKey1, $cKey2 ] );
 238                 if ( $versioned ) {
 239                         $this->assertEquals( $value, $v[$cache::VFLD_DATA], "Value returned" );
 240                 } else {
 241                         $this->assertEquals( $value, $v, "Value returned" );
 242                 }
 243                 $this->assertLessThanOrEqual( 0, $curTTL, "Value has current TTL < 0 due to check keys" );
 244
 245                 $wasSet = 0;
 246                 $key = wfRandomString();
 247                 $v = $cache->getWithSetCallback( $key, 30, $func, [ 'pcTTL' => 5 ] + $extOpts );
 248                 $this->assertEquals( $value, $v, "Value returned" );
 249                 $cache->delete( $key );
 250                 $v = $cache->getWithSetCallback( $key, 30, $func, [ 'pcTTL' => 5 ] + $extOpts );
 251                 $this->assertEquals( $value, $v, "Value still returned after deleted" );
 252                 $this->assertEquals( 1, $wasSet, "Value process cached while deleted" );
 253         }
 254
 255         public static function getWithSetCallback_provider() {
 256                 return [
 257                         [ [], false ],
 258                         [ [ 'version' => 1 ], true ]
 259                 ];
 260         }
 261
 262         /**
 263          * @dataProvider getMultiWithSetCallback_provider
 264          * @covers WANObjectCache::getMultiWithSetCallback()
 265          * @covers WANObjectCache::makeMultiKeys()
 266          * @param array $extOpts
 267          * @param bool $versioned
 268          */
 269         public function testGetMultiWithSetCallback( array $extOpts, $versioned ) {
 270                 $cache = $this->cache;
 271
 272                 $keyA = wfRandomString();
 273                 $keyB = wfRandomString();
 274                 $keyC = wfRandomString();
 275                 $cKey1 = wfRandomString();
 276                 $cKey2 = wfRandomString();
 277
 278                 $priorValue = null;
 279                 $priorAsOf = null;
 280                 $wasSet = 0;
 281                 $genFunc = function ( $id, $old, &$ttl, &$opts, $asOf ) use (
 282                         &$wasSet, &$priorValue, &$priorAsOf
 283                 ) {
 284                         ++$wasSet;
 285                         $priorValue = $old;
 286                         $priorAsOf = $asOf;
 287                         $ttl = 20; // override with another value
 288                         return "@$id$";
 289                 };
 290
 291                 $wasSet = 0;
 292                 $keyedIds = new ArrayIterator( [ $keyA => 3353 ] );
 293                 $value = "@3353$";
 294                 $v = $cache->getMultiWithSetCallback(
 295                         $keyedIds, 30, $genFunc, [ 'lockTSE' => 5 ] + $extOpts );
 296                 $this->assertEquals( $value, $v[$keyA], "Value returned" );
 297                 $this->assertEquals( 1, $wasSet, "Value regenerated" );
 298                 $this->assertFalse( $priorValue, "No prior value" );
 299                 $this->assertNull( $priorAsOf, "No prior value" );
 300
 301                 $curTTL = null;
 302                 $cache->get( $keyA, $curTTL );
 303                 $this->assertLessThanOrEqual( 20, $curTTL, 'Current TTL between 19-20 (overriden)' );
 304                 $this->assertGreaterThanOrEqual( 19, $curTTL, 'Current TTL between 19-20 (overriden)' );
 305
 306                 $wasSet = 0;
 307                 $value = "@efef$";
 308                 $keyedIds = new ArrayIterator( [ $keyB => 'efef' ] );
 309                 $v = $cache->getMultiWithSetCallback(
 310                         $keyedIds, 30, $genFunc, [ 'lowTTL' => 0, 'lockTSE' => 5, ] + $extOpts );
 311                 $this->assertEquals( $value, $v[$keyB], "Value returned" );
 312                 $this->assertEquals( 1, $wasSet, "Value regenerated" );
 313                 $this->assertEquals( 0, $cache->getWarmupKeyMisses(), "Keys warmed yet in process cache" );
 314                 $v = $cache->getMultiWithSetCallback(
 315                         $keyedIds, 30, $genFunc, [ 'lowTTL' => 0, 'lockTSE' => 5, ] + $extOpts );
 316                 $this->assertEquals( $value, $v[$keyB], "Value returned" );
 317                 $this->assertEquals( 1, $wasSet, "Value not regenerated" );
 318                 $this->assertEquals( 0, $cache->getWarmupKeyMisses(), "Keys warmed in process cache" );
 319
 320                 $priorTime = microtime( true );
 321                 usleep( 1 );
 322                 $wasSet = 0;
 323                 $keyedIds = new ArrayIterator( [ $keyB => 'efef' ] );
 324                 $v = $cache->getMultiWithSetCallback(
 325                         $keyedIds, 30, $genFunc, [ 'checkKeys' => [ $cKey1, $cKey2 ] ] + $extOpts
 326                 );
 327                 $this->assertEquals( $value, $v[$keyB], "Value returned" );
 328                 $this->assertEquals( 1, $wasSet, "Value regenerated due to check keys" );
 329                 $this->assertEquals( $value, $priorValue, "Has prior value" );
 330                 $this->assertInternalType( 'float', $priorAsOf, "Has prior value" );
 331                 $t1 = $cache->getCheckKeyTime( $cKey1 );
 332                 $this->assertGreaterThanOrEqual( $priorTime, $t1, 'Check keys generated on miss' );
 333                 $t2 = $cache->getCheckKeyTime( $cKey2 );
 334                 $this->assertGreaterThanOrEqual( $priorTime, $t2, 'Check keys generated on miss' );
 335
 336                 $priorTime = microtime( true );
 337                 $value = "@43636$";
 338                 $wasSet = 0;
 339                 $keyedIds = new ArrayIterator( [ $keyC => 43636 ] );
 340                 $v = $cache->getMultiWithSetCallback(
 341                         $keyedIds, 30, $genFunc, [ 'checkKeys' => [ $cKey1, $cKey2 ] ] + $extOpts
 342                 );
 343                 $this->assertEquals( $value, $v[$keyC], "Value returned" );
 344                 $this->assertEquals( 1, $wasSet, "Value regenerated due to still-recent check keys" );
 345                 $t1 = $cache->getCheckKeyTime( $cKey1 );
 346                 $this->assertLessThanOrEqual( $priorTime, $t1, 'Check keys did not change again' );
 347                 $t2 = $cache->getCheckKeyTime( $cKey2 );
 348                 $this->assertLessThanOrEqual( $priorTime, $t2, 'Check keys did not change again' );
 349
 350                 $curTTL = null;
 351                 $v = $cache->get( $keyC, $curTTL, [ $cKey1, $cKey2 ] );
 352                 if ( $versioned ) {
 353                         $this->assertEquals( $value, $v[$cache::VFLD_DATA], "Value returned" );
 354                 } else {
 355                         $this->assertEquals( $value, $v, "Value returned" );
 356                 }
 357                 $this->assertLessThanOrEqual( 0, $curTTL, "Value has current TTL < 0 due to check keys" );
 358
 359                 $wasSet = 0;
 360                 $key = wfRandomString();
 361                 $keyedIds = new ArrayIterator( [ $key => 242424 ] );
 362                 $v = $cache->getMultiWithSetCallback(
 363                         $keyedIds, 30, $genFunc, [ 'pcTTL' => 5 ] + $extOpts );
 364                 $this->assertEquals( "@{$keyedIds[$key]}$", $v[$key], "Value returned" );
 365                 $cache->delete( $key );
 366                 $keyedIds = new ArrayIterator( [ $key => 242424 ] );
 367                 $v = $cache->getMultiWithSetCallback(
 368                         $keyedIds, 30, $genFunc, [ 'pcTTL' => 5 ] + $extOpts );
 369                 $this->assertEquals( "@{$keyedIds[$key]}$", $v[$key], "Value still returned after deleted" );
 370                 $this->assertEquals( 1, $wasSet, "Value process cached while deleted" );
 371
 372                 $calls = 0;
 373                 $ids = [ 1, 2, 3, 4, 5, 6 ];
 374                 $keyFunc = function ( $id, WANObjectCache $wanCache ) {
 375                         return $wanCache->makeKey( 'test', $id );
 376                 };
 377                 $keyedIds = $cache->makeMultiKeys( $ids, $keyFunc );
 378                 $genFunc = function ( $id, $oldValue, &$ttl, array &$setops ) use ( &$calls ) {
 379                         ++$calls;
 380
 381                         return "val-{$id}";
 382                 };
 383                 $values = $cache->getMultiWithSetCallback( $keyedIds, 10, $genFunc );
 384
 385                 $this->assertEquals(
 386                         [ "val-1", "val-2", "val-3", "val-4", "val-5", "val-6" ],
 387                         array_values( $values ),
 388                         "Correct values in correct order"
 389                 );
 390                 $this->assertEquals(
 391                         array_map( $keyFunc, $ids, array_fill( 0, count( $ids ), $this->cache ) ),
 392                         array_keys( $values ),
 393                         "Correct keys in correct order"
 394                 );
 395                 $this->assertEquals( count( $ids ), $calls );
 396
 397                 $cache->getMultiWithSetCallback( $keyedIds, 10, $genFunc );
 398                 $this->assertEquals( count( $ids ), $calls, "Values cached" );
 399
 400                 // Mock the BagOStuff to assure only one getMulti() call given process caching
 401                 $localBag = $this->getMockBuilder( 'HashBagOStuff' )
 402                         ->setMethods( [ 'getMulti' ] )->getMock();
 403                 $localBag->expects( $this->exactly( 1 ) )->method( 'getMulti' )->willReturn( [
 404                         WANObjectCache::VALUE_KEY_PREFIX . 'k1' => 'val-id1',
 405                         WANObjectCache::VALUE_KEY_PREFIX . 'k2' => 'val-id2'
 406                 ] );
 407                 $wanCache = new WANObjectCache( [ 'cache' => $localBag, 'pool' => 'testcache-hash' ] );
 408
 409                 // Warm the process cache
 410                 $keyedIds = new ArrayIterator( [ 'k1' => 'id1', 'k2' => 'id2' ] );
 411                 $this->assertEquals(
 412                         [ 'k1' => 'val-id1', 'k2' => 'val-id2' ],
 413                         $wanCache->getMultiWithSetCallback( $keyedIds, 10, $genFunc, [ 'pcTTL' => 5 ] )
 414                 );
 415                 // Use the process cache
 416                 $this->assertEquals(
 417                         [ 'k1' => 'val-id1', 'k2' => 'val-id2' ],
 418                         $wanCache->getMultiWithSetCallback( $keyedIds, 10, $genFunc, [ 'pcTTL' => 5 ] )
 419                 );
 420         }
 421
 422         public static function getMultiWithSetCallback_provider() {
 423                 return [
 424                         [ [], false ],
 425                         [ [ 'version' => 1 ], true ]
 426                 ];
 427         }
 428
 429         /**
 430          * @covers WANObjectCache::getWithSetCallback()
 431          * @covers WANObjectCache::doGetWithSetCallback()
 432          */
 433         public function testLockTSE() {
 434                 $cache = $this->cache;
 435                 $key = wfRandomString();
 436                 $value = wfRandomString();
 437
 438                 $calls = 0;
 439                 $func = function() use ( &$calls, $value, $cache, $key ) {
 440                         ++$calls;
 441                         // Immediately kill any mutex rather than waiting a second
 442                         $cache->delete( $cache::MUTEX_KEY_PREFIX . $key );
 443                         return $value;
 444                 };
 445
 446                 $ret = $cache->getWithSetCallback( $key, 30, $func, [ 'lockTSE' => 5 ] );
 447                 $this->assertEquals( $value, $ret );
 448                 $this->assertEquals( 1, $calls, 'Value was populated' );
 449
 450                 // Acquire a lock to verify that getWithSetCallback uses lockTSE properly
 451                 $this->internalCache->add( $cache::MUTEX_KEY_PREFIX . $key, 1, 0 );
 452
 453                 $checkKeys = [ wfRandomString() ]; // new check keys => force misses
 454                 $ret = $cache->getWithSetCallback( $key, 30, $func,
 455                         [ 'lockTSE' => 5, 'checkKeys' => $checkKeys ] );
 456                 $this->assertEquals( $value, $ret, 'Old value used' );
 457                 $this->assertEquals( 1, $calls, 'Callback was not used' );
 458
 459                 $cache->delete( $key );
 460                 $ret = $cache->getWithSetCallback( $key, 30, $func,
 461                         [ 'lockTSE' => 5, 'checkKeys' => $checkKeys ] );
 462                 $this->assertEquals( $value, $ret, 'Callback was used; interim saved' );
 463                 $this->assertEquals( 2, $calls, 'Callback was used; interim saved' );
 464
 465                 $ret = $cache->getWithSetCallback( $key, 30, $func,
 466                         [ 'lockTSE' => 5, 'checkKeys' => $checkKeys ] );
 467                 $this->assertEquals( $value, $ret, 'Callback was not used; used interim' );
 468                 $this->assertEquals( 2, $calls, 'Callback was not used; used interim' );
 469         }
 470
 471         /**
 472          * @covers WANObjectCache::getWithSetCallback()
 473          * @covers WANObjectCache::doGetWithSetCallback()
 474          */
 475         public function testLockTSESlow() {
 476                 $cache = $this->cache;
 477                 $key = wfRandomString();
 478                 $value = wfRandomString();
 479
 480                 $calls = 0;
 481                 $func = function( $oldValue, &$ttl, &$setOpts ) use ( &$calls, $value, $cache, $key ) {
 482                         ++$calls;
 483                         $setOpts['since'] = microtime( true ) - 10;
 484                         // Immediately kill any mutex rather than waiting a second
 485                         $cache->delete( $cache::MUTEX_KEY_PREFIX . $key );
 486                         return $value;
 487                 };
 488
 489                 // Value should be marked as stale due to snapshot lag
 490                 $curTTL = null;
 491                 $ret = $cache->getWithSetCallback( $key, 30, $func, [ 'lockTSE' => 5 ] );
 492                 $this->assertEquals( $value, $ret );
 493                 $this->assertEquals( $value, $cache->get( $key, $curTTL ), 'Value was populated' );
 494                 $this->assertLessThan( 0, $curTTL, 'Value has negative curTTL' );
 495                 $this->assertEquals( 1, $calls, 'Value was generated' );
 496
 497                 // Acquire a lock to verify that getWithSetCallback uses lockTSE properly
 498                 $this->internalCache->add( $cache::MUTEX_KEY_PREFIX . $key, 1, 0 );
 499                 $ret = $cache->getWithSetCallback( $key, 30, $func, [ 'lockTSE' => 5 ] );
 500                 $this->assertEquals( $value, $ret );
 501                 $this->assertEquals( 1, $calls, 'Callback was not used' );
 502         }
 503
 504         /**
 505          * @covers WANObjectCache::getWithSetCallback()
 506          * @covers WANObjectCache::doGetWithSetCallback()
 507          */
 508         public function testBusyValue() {
 509                 $cache = $this->cache;
 510                 $key = wfRandomString();
 511                 $value = wfRandomString();
 512                 $busyValue = wfRandomString();
 513
 514                 $calls = 0;
 515                 $func = function() use ( &$calls, $value, $cache, $key ) {
 516                         ++$calls;
 517                         // Immediately kill any mutex rather than waiting a second
 518                         $cache->delete( $cache::MUTEX_KEY_PREFIX . $key );
 519                         return $value;
 520                 };
 521
 522                 $ret = $cache->getWithSetCallback( $key, 30, $func, [ 'busyValue' => $busyValue ] );
 523                 $this->assertEquals( $value, $ret );
 524                 $this->assertEquals( 1, $calls, 'Value was populated' );
 525
 526                 // Acquire a lock to verify that getWithSetCallback uses busyValue properly
 527                 $this->internalCache->add( $cache::MUTEX_KEY_PREFIX . $key, 1, 0 );
 528
 529                 $checkKeys = [ wfRandomString() ]; // new check keys => force misses
 530                 $ret = $cache->getWithSetCallback( $key, 30, $func,
 531                         [ 'busyValue' => $busyValue, 'checkKeys' => $checkKeys ] );
 532                 $this->assertEquals( $value, $ret, 'Callback used' );
 533                 $this->assertEquals( 2, $calls, 'Callback used' );
 534
 535                 $ret = $cache->getWithSetCallback( $key, 30, $func,
 536                         [ 'lockTSE' => 30, 'busyValue' => $busyValue, 'checkKeys' => $checkKeys ] );
 537                 $this->assertEquals( $value, $ret, 'Old value used' );
 538                 $this->assertEquals( 2, $calls, 'Callback was not used' );
 539
 540                 $cache->delete( $key ); // no value at all anymore and still locked
 541                 $ret = $cache->getWithSetCallback( $key, 30, $func,
 542                         [ 'busyValue' => $busyValue, 'checkKeys' => $checkKeys ] );
 543                 $this->assertEquals( $busyValue, $ret, 'Callback was not used; used busy value' );
 544                 $this->assertEquals( 2, $calls, 'Callback was not used; used busy value' );
 545
 546                 $this->internalCache->delete( $cache::MUTEX_KEY_PREFIX . $key );
 547                 $ret = $cache->getWithSetCallback( $key, 30, $func,
 548                         [ 'lockTSE' => 30, 'busyValue' => $busyValue, 'checkKeys' => $checkKeys ] );
 549                 $this->assertEquals( $value, $ret, 'Callback was used; saved interim' );
 550                 $this->assertEquals( 3, $calls, 'Callback was used; saved interim' );
 551
 552                 $this->internalCache->add( $cache::MUTEX_KEY_PREFIX . $key, 1, 0 );
 553                 $ret = $cache->getWithSetCallback( $key, 30, $func,
 554                         [ 'busyValue' => $busyValue, 'checkKeys' => $checkKeys ] );
 555                 $this->assertEquals( $value, $ret, 'Callback was not used; used interim' );
 556                 $this->assertEquals( 3, $calls, 'Callback was not used; used interim' );
 557         }
 558
 559         /**
 560          * @covers WANObjectCache::getMulti()
 561          */
 562         public function testGetMulti() {
 563                 $cache = $this->cache;
 564
 565                 $value1 = [ 'this' => 'is', 'a' => 'test' ];
 566                 $value2 = [ 'this' => 'is', 'another' => 'test' ];
 567
 568                 $key1 = wfRandomString();
 569                 $key2 = wfRandomString();
 570                 $key3 = wfRandomString();
 571
 572                 $cache->set( $key1, $value1, 5 );
 573                 $cache->set( $key2, $value2, 10 );
 574
 575                 $curTTLs = [];
 576                 $this->assertEquals(
 577                         [ $key1 => $value1, $key2 => $value2 ],
 578                         $cache->getMulti( [ $key1, $key2, $key3 ], $curTTLs ),
 579                         'Result array populated'
 580                 );
 581
 582                 $this->assertEquals( 2, count( $curTTLs ), "Two current TTLs in array" );
 583                 $this->assertGreaterThan( 0, $curTTLs[$key1], "Key 1 has current TTL > 0" );
 584                 $this->assertGreaterThan( 0, $curTTLs[$key2], "Key 2 has current TTL > 0" );
 585
 586                 $cKey1 = wfRandomString();
 587                 $cKey2 = wfRandomString();
 588
 589                 $priorTime = microtime( true );
 590                 usleep( 1 );
 591                 $curTTLs = [];
 592                 $this->assertEquals(
 593                         [ $key1 => $value1, $key2 => $value2 ],
 594                         $cache->getMulti( [ $key1, $key2, $key3 ], $curTTLs, [ $cKey1, $cKey2 ] ),
 595                         "Result array populated even with new check keys"
 596                 );
 597                 $t1 = $cache->getCheckKeyTime( $cKey1 );
 598                 $this->assertGreaterThanOrEqual( $priorTime, $t1, 'Check key 1 generated on miss' );
 599                 $t2 = $cache->getCheckKeyTime( $cKey2 );
 600                 $this->assertGreaterThanOrEqual( $priorTime, $t2, 'Check key 2 generated on miss' );
 601                 $this->assertEquals( 2, count( $curTTLs ), "Current TTLs array set" );
 602                 $this->assertLessThanOrEqual( 0, $curTTLs[$key1], 'Key 1 has current TTL <= 0' );
 603                 $this->assertLessThanOrEqual( 0, $curTTLs[$key2], 'Key 2 has current TTL <= 0' );
 604
 605                 usleep( 1 );
 606                 $curTTLs = [];
 607                 $this->assertEquals(
 608                         [ $key1 => $value1, $key2 => $value2 ],
 609                         $cache->getMulti( [ $key1, $key2, $key3 ], $curTTLs, [ $cKey1, $cKey2 ] ),
 610                         "Result array still populated even with new check keys"
 611                 );
 612                 $this->assertEquals( 2, count( $curTTLs ), "Current TTLs still array set" );
 613                 $this->assertLessThan( 0, $curTTLs[$key1], 'Key 1 has negative current TTL' );
 614                 $this->assertLessThan( 0, $curTTLs[$key2], 'Key 2 has negative current TTL' );
 615         }
 616
 617         /**
 618          * @covers WANObjectCache::getMulti()
 619          * @covers WANObjectCache::processCheckKeys()
 620          */
 621         public function testGetMultiCheckKeys() {
 622                 $cache = $this->cache;
 623
 624                 $checkAll = wfRandomString();
 625                 $check1 = wfRandomString();
 626                 $check2 = wfRandomString();
 627                 $check3 = wfRandomString();
 628                 $value1 = wfRandomString();
 629                 $value2 = wfRandomString();
 630
 631                 // Fake initial check key to be set in the past. Otherwise we'd have to sleep for
 632                 // several seconds during the test to assert the behaviour.
 633                 foreach ( [ $checkAll, $check1, $check2 ] as $checkKey ) {
 634                         $cache->touchCheckKey( $checkKey, WANObjectCache::HOLDOFF_NONE );
 635                 }
 636                 usleep( 100 );
 637
 638                 $cache->set( 'key1', $value1, 10 );
 639                 $cache->set( 'key2', $value2, 10 );
 640
 641                 $curTTLs = [];
 642                 $result = $cache->getMulti( [ 'key1', 'key2', 'key3' ], $curTTLs, [
 643                         'key1' => $check1,
 644                         $checkAll,
 645                         'key2' => $check2,
 646                         'key3' => $check3,
 647                 ] );
 648                 $this->assertEquals(
 649                         [ 'key1' => $value1, 'key2' => $value2 ],
 650                         $result,
 651                         'Initial values'
 652                 );
 653                 $this->assertGreaterThanOrEqual( 9.5, $curTTLs['key1'], 'Initial ttls' );
 654                 $this->assertLessThanOrEqual( 10.5, $curTTLs['key1'], 'Initial ttls' );
 655                 $this->assertGreaterThanOrEqual( 9.5, $curTTLs['key2'], 'Initial ttls' );
 656                 $this->assertLessThanOrEqual( 10.5, $curTTLs['key2'], 'Initial ttls' );
 657
 658                 $cache->touchCheckKey( $check1 );
 659
 660                 $curTTLs = [];
 661                 $result = $cache->getMulti( [ 'key1', 'key2', 'key3' ], $curTTLs, [
 662                         'key1' => $check1,
 663                         $checkAll,
 664                         'key2' => $check2,
 665                         'key3' => $check3,
 666                 ] );
 667                 $this->assertEquals(
 668                         [ 'key1' => $value1, 'key2' => $value2 ],
 669                         $result,
 670                         'key1 expired by check1, but value still provided'
 671                 );
 672                 $this->assertLessThan( 0, $curTTLs['key1'], 'key1 TTL expired' );
 673                 $this->assertGreaterThan( 0, $curTTLs['key2'], 'key2 still valid' );
 674
 675                 $cache->touchCheckKey( $checkAll );
 676
 677                 $curTTLs = [];
 678                 $result = $cache->getMulti( [ 'key1', 'key2', 'key3' ], $curTTLs, [
 679                         'key1' => $check1,
 680                         $checkAll,
 681                         'key2' => $check2,
 682                         'key3' => $check3,
 683                 ] );
 684                 $this->assertEquals(
 685                         [ 'key1' => $value1, 'key2' => $value2 ],
 686                         $result,
 687                         'All keys expired by checkAll, but value still provided'
 688                 );
 689                 $this->assertLessThan( 0, $curTTLs['key1'], 'key1 expired by checkAll' );
 690                 $this->assertLessThan( 0, $curTTLs['key2'], 'key2 expired by checkAll' );
 691         }
 692
 693         /**
 694          * @covers WANObjectCache::get()
 695          * @covers WANObjectCache::processCheckKeys()
 696          */
 697         public function testCheckKeyInitHoldoff() {
 698                 $cache = $this->cache;
 699
 700                 for ( $i = 0; $i < 500; ++$i ) {
 701                         $key = wfRandomString();
 702                         $checkKey = wfRandomString();
 703                         // miss, set, hit
 704                         $cache->get( $key, $curTTL, [ $checkKey ] );
 705                         $cache->set( $key, 'val', 10 );
 706                         $curTTL = null;
 707                         $v = $cache->get( $key, $curTTL, [ $checkKey ] );
 708
 709                         $this->assertEquals( 'val', $v );
 710                         $this->assertLessThan( 0, $curTTL, "Step $i: CTL < 0 (miss/set/hit)" );
 711                 }
 712
 713                 for ( $i = 0; $i < 500; ++$i ) {
 714                         $key = wfRandomString();
 715                         $checkKey = wfRandomString();
 716                         // set, hit
 717                         $cache->set( $key, 'val', 10 );
 718                         $curTTL = null;
 719                         $v = $cache->get( $key, $curTTL, [ $checkKey ] );
 720
 721                         $this->assertEquals( 'val', $v );
 722                         $this->assertLessThan( 0, $curTTL, "Step $i: CTL < 0 (set/hit)" );
 723                 }
 724         }
 725
 726         /**
 727          * @covers WANObjectCache::delete()
 728          */
 729         public function testDelete() {
 730                 $key = wfRandomString();
 731                 $value = wfRandomString();
 732                 $this->cache->set( $key, $value );
 733
 734                 $curTTL = null;
 735                 $v = $this->cache->get( $key, $curTTL );
 736                 $this->assertEquals( $value, $v, "Key was created with value" );
 737                 $this->assertGreaterThan( 0, $curTTL, "Existing key has current TTL > 0" );
 738
 739                 $this->cache->delete( $key );
 740
 741                 $curTTL = null;
 742                 $v = $this->cache->get( $key, $curTTL );
 743                 $this->assertFalse( $v, "Deleted key has false value" );
 744                 $this->assertLessThan( 0, $curTTL, "Deleted key has current TTL < 0" );
 745
 746                 $this->cache->set( $key, $value . 'more' );
 747                 $v = $this->cache->get( $key, $curTTL );
 748                 $this->assertFalse( $v, "Deleted key is tombstoned and has false value" );
 749                 $this->assertLessThan( 0, $curTTL, "Deleted key is tombstoned and has current TTL < 0" );
 750
 751                 $this->cache->set( $key, $value );
 752                 $this->cache->delete( $key, WANObjectCache::HOLDOFF_NONE );
 753
 754                 $curTTL = null;
 755                 $v = $this->cache->get( $key, $curTTL );
 756                 $this->assertFalse( $v, "Deleted key has false value" );
 757                 $this->assertNull( $curTTL, "Deleted key has null current TTL" );
 758
 759                 $this->cache->set( $key, $value );
 760                 $v = $this->cache->get( $key, $curTTL );
 761                 $this->assertEquals( $value, $v, "Key was created with value" );
 762                 $this->assertGreaterThan( 0, $curTTL, "Existing key has current TTL > 0" );
 763         }
 764
 765         /**
 766          * @dataProvider getWithSetCallback_versions_provider
 767          * @param array $extOpts
 768          * @param $versioned
 769          */
 770         public function testGetWithSetCallback_versions( array $extOpts, $versioned ) {
 771                 $cache = $this->cache;
 772
 773                 $key = wfRandomString();
 774                 $value = wfRandomString();
 775
 776                 $wasSet = 0;
 777                 $func = function( $old, &$ttl ) use ( &$wasSet, $value ) {
 778                         ++$wasSet;
 779                         return $value;
 780                 };
 781
 782                 // Set the main key (version N if versioned)
 783                 $wasSet = 0;
 784                 $v = $cache->getWithSetCallback( $key, 30, $func, $extOpts );
 785                 $this->assertEquals( $value, $v, "Value returned" );
 786                 $this->assertEquals( 1, $wasSet, "Value regenerated" );
 787                 $cache->getWithSetCallback( $key, 30, $func, $extOpts );
 788                 $this->assertEquals( 1, $wasSet, "Value not regenerated" );
 789                 // Set the key for version N+1 (if versioned)
 790                 if ( $versioned ) {
 791                         $verOpts = [ 'version' => $extOpts['version'] + 1 ];
 792
 793                         $wasSet = 0;
 794                         $v = $cache->getWithSetCallback( $key, 30, $func, $verOpts + $extOpts );
 795                         $this->assertEquals( $value, $v, "Value returned" );
 796                         $this->assertEquals( 1, $wasSet, "Value regenerated" );
 797
 798                         $wasSet = 0;
 799                         $v = $cache->getWithSetCallback( $key, 30, $func, $verOpts + $extOpts );
 800                         $this->assertEquals( $value, $v, "Value returned" );
 801                         $this->assertEquals( 0, $wasSet, "Value not regenerated" );
 802                 }
 803
 804                 $wasSet = 0;
 805                 $cache->getWithSetCallback( $key, 30, $func, $extOpts );
 806                 $this->assertEquals( 0, $wasSet, "Value not regenerated" );
 807
 808                 $wasSet = 0;
 809                 $cache->delete( $key );
 810                 $v = $cache->getWithSetCallback( $key, 30, $func, $extOpts );
 811                 $this->assertEquals( $value, $v, "Value returned" );
 812                 $this->assertEquals( 1, $wasSet, "Value regenerated" );
 813
 814                 if ( $versioned ) {
 815                         $wasSet = 0;
 816                         $verOpts = [ 'version' => $extOpts['version'] + 1 ];
 817                         $v = $cache->getWithSetCallback( $key, 30, $func, $verOpts + $extOpts );
 818                         $this->assertEquals( $value, $v, "Value returned" );
 819                         $this->assertEquals( 1, $wasSet, "Value regenerated" );
 820                 }
 821         }
 822
 823         public static function getWithSetCallback_versions_provider() {
 824                 return [
 825                         [ [], false ],
 826                         [ [ 'version' => 1 ], true ]
 827                 ];
 828         }
 829
 830         /**
 831          * @covers WANObjectCache::touchCheckKey()
 832          * @covers WANObjectCache::resetCheckKey()
 833          * @covers WANObjectCache::getCheckKeyTime()
 834          */
 835         public function testTouchKeys() {
 836                 $key = wfRandomString();
 837
 838                 $priorTime = microtime( true );
 839                 usleep( 100 );
 840                 $t0 = $this->cache->getCheckKeyTime( $key );
 841                 $this->assertGreaterThanOrEqual( $priorTime, $t0, 'Check key auto-created' );
 842
 843                 $priorTime = microtime( true );
 844                 usleep( 100 );
 845                 $this->cache->touchCheckKey( $key );
 846                 $t1 = $this->cache->getCheckKeyTime( $key );
 847                 $this->assertGreaterThanOrEqual( $priorTime, $t1, 'Check key created' );
 848
 849                 $t2 = $this->cache->getCheckKeyTime( $key );
 850                 $this->assertEquals( $t1, $t2, 'Check key time did not change' );
 851
 852                 usleep( 100 );
 853                 $this->cache->touchCheckKey( $key );
 854                 $t3 = $this->cache->getCheckKeyTime( $key );
 855                 $this->assertGreaterThan( $t2, $t3, 'Check key time increased' );
 856
 857                 $t4 = $this->cache->getCheckKeyTime( $key );
 858                 $this->assertEquals( $t3, $t4, 'Check key time did not change' );
 859
 860                 usleep( 100 );
 861                 $this->cache->resetCheckKey( $key );
 862                 $t5 = $this->cache->getCheckKeyTime( $key );
 863                 $this->assertGreaterThan( $t4, $t5, 'Check key time increased' );
 864
 865                 $t6 = $this->cache->getCheckKeyTime( $key );
 866                 $this->assertEquals( $t5, $t6, 'Check key time did not change' );
 867         }
 868
 869         /**
 870          * @covers WANObjectCache::getMulti()
 871          */
 872         public function testGetWithSeveralCheckKeys() {
 873                 $key = wfRandomString();
 874                 $tKey1 = wfRandomString();
 875                 $tKey2 = wfRandomString();
 876                 $value = 'meow';
 877
 878                 // Two check keys are newer (given hold-off) than $key, another is older
 879                 $this->internalCache->set(
 880                         WANObjectCache::TIME_KEY_PREFIX . $tKey2,
 881                         WANObjectCache::PURGE_VAL_PREFIX . ( microtime( true ) - 3 )
 882                 );
 883                 $this->internalCache->set(
 884                         WANObjectCache::TIME_KEY_PREFIX . $tKey2,
 885                         WANObjectCache::PURGE_VAL_PREFIX . ( microtime( true ) - 5 )
 886                 );
 887                 $this->internalCache->set(
 888                         WANObjectCache::TIME_KEY_PREFIX . $tKey1,
 889                         WANObjectCache::PURGE_VAL_PREFIX . ( microtime( true ) - 30 )
 890                 );
 891                 $this->cache->set( $key, $value, 30 );
 892
 893                 $curTTL = null;
 894                 $v = $this->cache->get( $key, $curTTL, [ $tKey1, $tKey2 ] );
 895                 $this->assertEquals( $value, $v, "Value matches" );
 896                 $this->assertLessThan( -4.9, $curTTL, "Correct CTL" );
 897                 $this->assertGreaterThan( -5.1, $curTTL, "Correct CTL" );
 898         }
 899
 900         /**
 901          * @covers WANObjectCache::reap()
 902          * @covers WANObjectCache::reapCheckKey()
 903          */
 904         public function testReap() {
 905                 $vKey1 = wfRandomString();
 906                 $vKey2 = wfRandomString();
 907                 $tKey1 = wfRandomString();
 908                 $tKey2 = wfRandomString();
 909                 $value = 'moo';
 910
 911                 $knownPurge = time() - 60;
 912                 $goodTime = microtime( true ) - 5;
 913                 $badTime = microtime( true ) - 300;
 914
 915                 $this->internalCache->set(
 916                         WANObjectCache::VALUE_KEY_PREFIX . $vKey1,
 917                         [
 918                                 WANObjectCache::FLD_VERSION => WANObjectCache::VERSION,
 919                                 WANObjectCache::FLD_VALUE => $value,
 920                                 WANObjectCache::FLD_TTL => 3600,
 921                                 WANObjectCache::FLD_TIME => $goodTime
 922                         ]
 923                 );
 924                 $this->internalCache->set(
 925                         WANObjectCache::VALUE_KEY_PREFIX . $vKey2,
 926                         [
 927                                 WANObjectCache::FLD_VERSION => WANObjectCache::VERSION,
 928                                 WANObjectCache::FLD_VALUE => $value,
 929                                 WANObjectCache::FLD_TTL => 3600,
 930                                 WANObjectCache::FLD_TIME => $badTime
 931                         ]
 932                 );
 933                 $this->internalCache->set(
 934                         WANObjectCache::TIME_KEY_PREFIX . $tKey1,
 935                         WANObjectCache::PURGE_VAL_PREFIX . $goodTime
 936                 );
 937                 $this->internalCache->set(
 938                         WANObjectCache::TIME_KEY_PREFIX . $tKey2,
 939                         WANObjectCache::PURGE_VAL_PREFIX . $badTime
 940                 );
 941
 942                 $this->assertEquals( $value, $this->cache->get( $vKey1 ) );
 943                 $this->assertEquals( $value, $this->cache->get( $vKey2 ) );
 944                 $this->cache->reap( $vKey1, $knownPurge, $bad1 );
 945                 $this->cache->reap( $vKey2, $knownPurge, $bad2 );
 946
 947                 $this->assertFalse( $bad1 );
 948                 $this->assertTrue( $bad2 );
 949
 950                 $this->cache->reapCheckKey( $tKey1, $knownPurge, $tBad1 );
 951                 $this->cache->reapCheckKey( $tKey2, $knownPurge, $tBad2 );
 952                 $this->assertFalse( $tBad1 );
 953                 $this->assertTrue( $tBad2 );
 954         }
 955
 956         /**
 957          * @covers WANObjectCache::set()
 958          */
 959         public function testSetWithLag() {
 960                 $value = 1;
 961
 962                 $key = wfRandomString();
 963                 $opts = [ 'lag' => 300, 'since' => microtime( true ) ];
 964                 $this->cache->set( $key, $value, 30, $opts );
 965                 $this->assertEquals( $value, $this->cache->get( $key ), "Rep-lagged value written." );
 966
 967                 $key = wfRandomString();
 968                 $opts = [ 'lag' => 0, 'since' => microtime( true ) - 300 ];
 969                 $this->cache->set( $key, $value, 30, $opts );
 970                 $this->assertEquals( false, $this->cache->get( $key ), "Trx-lagged value not written." );
 971
 972                 $key = wfRandomString();
 973                 $opts = [ 'lag' => 5, 'since' => microtime( true ) - 5 ];
 974                 $this->cache->set( $key, $value, 30, $opts );
 975                 $this->assertEquals( false, $this->cache->get( $key ), "Lagged value not written." );
 976         }
 977
 978         /**
 979          * @covers WANObjectCache::set()
 980          */
 981         public function testWritePending() {
 982                 $value = 1;
 983
 984                 $key = wfRandomString();
 985                 $opts = [ 'pending' => true ];
 986                 $this->cache->set( $key, $value, 30, $opts );
 987                 $this->assertEquals( false, $this->cache->get( $key ), "Pending value not written." );
 988         }
 989
 990         public function testMcRouterSupport() {
 991                 $localBag = $this->getMockBuilder( 'EmptyBagOStuff' )
 992                         ->setMethods( [ 'set', 'delete' ] )->getMock();
 993                 $localBag->expects( $this->never() )->method( 'set' );
 994                 $localBag->expects( $this->never() )->method( 'delete' );
 995                 $wanCache = new WANObjectCache( [
 996                         'cache' => $localBag,
 997                         'pool' => 'testcache-hash',
 998                         'relayer' => new EventRelayerNull( [] )
 999                 ] );
1000                 $valFunc = function () {
1001                         return 1;
1002                 };
1003
1004                 // None of these should use broadcasting commands (e.g. SET, DELETE)
1005                 $wanCache->get( 'x' );
1006                 $wanCache->get( 'x', $ctl, [ 'check1' ] );
1007                 $wanCache->getMulti( [ 'x', 'y' ] );
1008                 $wanCache->getMulti( [ 'x', 'y' ], $ctls, [ 'check2' ] );
1009                 $wanCache->getWithSetCallback( 'p', 30, $valFunc );
1010                 $wanCache->getCheckKeyTime( 'zzz' );
1011                 $wanCache->reap( 'x', time() - 300 );
1012                 $wanCache->reap( 'zzz', time() - 300 );
1013         }
1014
1015         /**
1016          * @dataProvider provideAdaptiveTTL
1017          * @covers WANObjectCache::adaptiveTTL()
1018          * @param float|int $ago
1019          * @param int $maxTTL
1020          * @param int $minTTL
1021          * @param float $factor
1022          * @param int $adaptiveTTL
1023          */
1024         public function testAdaptiveTTL( $ago, $maxTTL, $minTTL, $factor, $adaptiveTTL ) {
1025                 $mtime = $ago ? time() - $ago : $ago;
1026                 $margin = 5;
1027                 $ttl = $this->cache->adaptiveTTL( $mtime, $maxTTL, $minTTL, $factor );
1028
1029                 $this->assertGreaterThanOrEqual( $adaptiveTTL - $margin, $ttl );
1030                 $this->assertLessThanOrEqual( $adaptiveTTL + $margin, $ttl );
1031
1032                 $ttl = $this->cache->adaptiveTTL( (string)$mtime, $maxTTL, $minTTL, $factor );
1033
1034                 $this->assertGreaterThanOrEqual( $adaptiveTTL - $margin, $ttl );
1035                 $this->assertLessThanOrEqual( $adaptiveTTL + $margin, $ttl );
1036         }
1037
1038         public static function provideAdaptiveTTL() {
1039                 return [
1040                         [ 3600, 900, 30, .2, 720 ],
1041                         [ 3600, 500, 30, .2, 500 ],
1042                         [ 3600, 86400, 800, .2, 800 ],
1043                         [ false, 86400, 800, .2, 800 ],
1044                         [ null, 86400, 800, .2, 800 ]
1045                 ];
1046         }
1047 }