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

   1 <?php
   2
   3 /**
   4  * @group BagOStuff
   5  */
   6 class CachedBagOStuffTest extends PHPUnit_Framework_TestCase {
   7
   8         public function testGetFromBackend() {
   9                 $backend = new HashBagOStuff;
  10                 $cache = new CachedBagOStuff( $backend );
  11
  12                 $backend->set( 'foo', 'bar' );
  13                 $this->assertEquals( 'bar', $cache->get( 'foo' ) );
  14
  15                 $backend->set( 'foo', 'baz' );
  16                 $this->assertEquals( 'bar', $cache->get( 'foo' ), 'cached' );
  17         }
  18
  19         public function testSetAndDelete() {
  20                 $backend = new HashBagOStuff;
  21                 $cache = new CachedBagOStuff( $backend );
  22
  23                 for ( $i = 0; $i < 10; $i++ ) {
  24                         $cache->set( "key$i", 1 );
  25                         $this->assertEquals( 1, $cache->get( "key$i" ) );
  26                         $this->assertEquals( 1, $backend->get( "key$i" ) );
  27                         $cache->delete( "key$i" );
  28                         $this->assertEquals( false, $cache->get( "key$i" ) );
  29                         $this->assertEquals( false, $backend->get( "key$i" ) );
  30                 }
  31         }
  32
  33         public function testWriteCacheOnly() {
  34                 $backend = new HashBagOStuff;
  35                 $cache = new CachedBagOStuff( $backend );
  36
  37                 $cache->set( 'foo', 'bar', 0, CachedBagOStuff::WRITE_CACHE_ONLY );
  38                 $this->assertEquals( 'bar', $cache->get( 'foo' ) );
  39                 $this->assertFalse( $backend->get( 'foo' ) );
  40
  41                 $cache->set( 'foo', 'old' );
  42                 $this->assertEquals( 'old', $cache->get( 'foo' ) );
  43                 $this->assertEquals( 'old', $backend->get( 'foo' ) );
  44
  45                 $cache->set( 'foo', 'new', 0, CachedBagOStuff::WRITE_CACHE_ONLY );
  46                 $this->assertEquals( 'new', $cache->get( 'foo' ) );
  47                 $this->assertEquals( 'old', $backend->get( 'foo' ) );
  48
  49                 $cache->delete( 'foo', CachedBagOStuff::WRITE_CACHE_ONLY );
  50                 $this->assertEquals( 'old', $cache->get( 'foo' ) ); // Reloaded from backend
  51         }
  52
  53         public function testCacheBackendMisses() {
  54                 $backend = new HashBagOStuff;
  55                 $cache = new CachedBagOStuff( $backend );
  56
  57                 // First hit primes the cache with miss from the backend
  58                 $this->assertEquals( false, $cache->get( 'foo' ) );
  59
  60                 // Change the value in the backend
  61                 $backend->set( 'foo', true );
  62
  63                 // Second hit returns the cached miss
  64                 $this->assertEquals( false, $cache->get( 'foo' ) );
  65
  66                 // But a fresh value is read from the backend
  67                 $backend->set( 'bar', true );
  68                 $this->assertEquals( true, $cache->get( 'bar' ) );
  69         }
  70 }