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<?php
use Wikimedia\TestingAccessWrapper;
/**
* @group BagOStuff
*/
class CachedBagOStuffTest extends PHPUnit\Framework\TestCase {
use MediaWikiCoversValidator;
/**
* @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' ) );
}
}
|
