MediaWiki 1.30.2

[autoinstallsdev/mediawiki.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
new file mode 100644 (file)
index 0000000..8b9abbc
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+++ b/tests/phpunit/includes/libs/objectcache/CachedBagOStuffTest.php
@@ -0,0 +1,156 @@
+<?php
+
+use Wikimedia\TestingAccessWrapper;
+
+/**
+ * @group BagOStuff
+ */
+class CachedBagOStuffTest extends PHPUnit_Framework_TestCase {
+
+       /**
+        * @covers CachedBagOStuff::__construct
+        * @covers CachedBagOStuff::doGet
+        */
+       public function testGetFromBackend() {
+               $backend = new HashBagOStuff;
+               $cache = new CachedBagOStuff( $backend );
+
+               $backend->set( 'foo', 'bar' );
+               $this->assertEquals( 'bar', $cache->get( 'foo' ) );
+
+               $backend->set( 'foo', 'baz' );
+               $this->assertEquals( 'bar', $cache->get( 'foo' ), 'cached' );
+       }
+
+       /**
+        * @covers CachedBagOStuff::set
+        * @covers CachedBagOStuff::delete
+        */
+       public function testSetAndDelete() {
+               $backend = new HashBagOStuff;
+               $cache = new CachedBagOStuff( $backend );
+
+               for ( $i = 0; $i < 10; $i++ ) {
+                       $cache->set( "key$i", 1 );
+                       $this->assertEquals( 1, $cache->get( "key$i" ) );
+                       $this->assertEquals( 1, $backend->get( "key$i" ) );
+                       $cache->delete( "key$i" );
+                       $this->assertEquals( false, $cache->get( "key$i" ) );
+                       $this->assertEquals( false, $backend->get( "key$i" ) );
+               }
+       }
+
+       /**
+        * @covers CachedBagOStuff::set
+        * @covers CachedBagOStuff::delete
+        */
+       public function testWriteCacheOnly() {
+               $backend = new HashBagOStuff;
+               $cache = new CachedBagOStuff( $backend );
+
+               $cache->set( 'foo', 'bar', 0, CachedBagOStuff::WRITE_CACHE_ONLY );
+               $this->assertEquals( 'bar', $cache->get( 'foo' ) );
+               $this->assertFalse( $backend->get( 'foo' ) );
+
+               $cache->set( 'foo', 'old' );
+               $this->assertEquals( 'old', $cache->get( 'foo' ) );
+               $this->assertEquals( 'old', $backend->get( 'foo' ) );
+
+               $cache->set( 'foo', 'new', 0, CachedBagOStuff::WRITE_CACHE_ONLY );
+               $this->assertEquals( 'new', $cache->get( 'foo' ) );
+               $this->assertEquals( 'old', $backend->get( 'foo' ) );
+
+               $cache->delete( 'foo', CachedBagOStuff::WRITE_CACHE_ONLY );
+               $this->assertEquals( 'old', $cache->get( 'foo' ) ); // Reloaded from backend
+       }
+
+       /**
+        * @covers CachedBagOStuff::doGet
+        */
+       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' ) );
+       }
+
+       /**
+        * @covers CachedBagOStuff::setDebug
+        */
+       public function testSetDebug() {
+               $backend = new HashBagOStuff();
+               $cache = new CachedBagOStuff( $backend );
+               // Access private property 'debugMode'
+               $backend = TestingAccessWrapper::newFromObject( $backend );
+               $cache = TestingAccessWrapper::newFromObject( $cache );
+               $this->assertFalse( $backend->debugMode );
+               $this->assertFalse( $cache->debugMode );
+
+               $cache->setDebug( true );
+               // Should have set both
+               $this->assertTrue( $backend->debugMode, 'sets backend' );
+               $this->assertTrue( $cache->debugMode, 'sets self' );
+       }
+
+       /**
+        * @covers CachedBagOStuff::deleteObjectsExpiringBefore
+        */
+       public function testExpire() {
+               $backend = $this->getMockBuilder( HashBagOStuff::class )
+                       ->setMethods( [ 'deleteObjectsExpiringBefore' ] )
+                       ->getMock();
+               $backend->expects( $this->once() )
+                       ->method( 'deleteObjectsExpiringBefore' )
+                       ->willReturn( false );
+
+               $cache = new CachedBagOStuff( $backend );
+               $cache->deleteObjectsExpiringBefore( '20110401000000' );
+       }
+
+       /**
+        * @covers CachedBagOStuff::makeKey
+        */
+       public function testMakeKey() {
+               $backend = $this->getMockBuilder( HashBagOStuff::class )
+                       ->setMethods( [ 'makeKey' ] )
+                       ->getMock();
+               $backend->method( 'makeKey' )
+                       ->willReturn( 'special/logic' );
+
+               // CachedBagOStuff wraps any backend with a process cache
+               // using HashBagOStuff. Hash has no special key limitations,
+               // but backends often do. Make sure it uses the backend's
+               // makeKey() logic, not the one inherited from HashBagOStuff
+               $cache = new CachedBagOStuff( $backend );
+
+               $this->assertEquals( 'special/logic', $backend->makeKey( 'special', 'logic' ) );
+               $this->assertEquals( 'special/logic', $cache->makeKey( 'special', 'logic' ) );
+       }
+
+       /**
+        * @covers CachedBagOStuff::makeGlobalKey
+        */
+       public function testMakeGlobalKey() {
+               $backend = $this->getMockBuilder( HashBagOStuff::class )
+                       ->setMethods( [ 'makeGlobalKey' ] )
+                       ->getMock();
+               $backend->method( 'makeGlobalKey' )
+                       ->willReturn( 'special/logic' );
+
+               $cache = new CachedBagOStuff( $backend );
+
+               $this->assertEquals( 'special/logic', $backend->makeGlobalKey( 'special', 'logic' ) );
+               $this->assertEquals( 'special/logic', $cache->makeGlobalKey( 'special', 'logic' ) );
+       }
+}