CachedBagOStuff: cache backend misses

[lhc/web/wiklou.git] / tests / phpunit / includes / libs / objectcache / CachedBagOStuffTest.php

diff --git a/tests/phpunit/includes/libs/objectcache/CachedBagOStuffTest.php b/tests/phpunit/includes/libs/objectcache/CachedBagOStuffTest.php
index 3b19c9a..7fe8055 100644 (file)
--- a/tests/phpunit/includes/libs/objectcache/CachedBagOStuffTest.php
+++ b/tests/phpunit/includes/libs/objectcache/CachedBagOStuffTest.php
@@ -49,4 +49,22 @@ class CachedBagOStuffTest extends PHPUnit_Framework_TestCase {
                $cache->delete( 'foo', CachedBagOStuff::WRITE_CACHE_ONLY );
                $this->assertEquals( 'old', $cache->get( 'foo' ) ); // Reloaded from backend
        }
+
+       public function testCacheBackendMisses() {
+               $backend = new HashBagOStuff;
+               $cache = new CachedBagOStuff( $backend );
+
+               // First hit primes the cache with miss from the backend
+               $this->assertEquals( false, $cache->get( 'foo' ) );
+
+               // Change the value in the backend
+               $backend->set( 'foo', true );
+
+               // Second hit returns the cached miss
+               $this->assertEquals( false, $cache->get( 'foo' ) );
+
+               // But a fresh value is read from the backend
+               $backend->set( 'bar', true );
+               $this->assertEquals( true, $cache->get( 'bar' ) );
+       }
 }