PdoBackendTest.php

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<?php
namespace TYPO3\CMS\Core\Tests\Unit\Cache\Backend;

class PdoBackendTest extends \TYPO3\CMS\Core\Tests\UnitTestCase {

    public function setUp() {
        if (!extension_loaded('pdo_sqlite')) {
            $this->markTestSkipped('pdo_sqlite extension was not available');
        }
    }

    public function setThrowsExceptionIfNoFrontEndHasBeenSet() {
        $backend = new \TYPO3\CMS\Core\Cache\Backend\PdoBackend('Testing');
        $data = 'Some data';
        $identifier = 'MyIdentifier';
        $backend->set($identifier, $data);
    }

    public function itIsPossibleToSetAndCheckExistenceInCache() {
        $backend = $this->setUpBackend();
        $data = 'Some data';
        $identifier = 'MyIdentifier';
        $backend->set($identifier, $data);
        $this->assertTrue($backend->has($identifier));
    }

    public function itIsPossibleToSetAndGetEntry() {
        $backend = $this->setUpBackend();
        $data = 'Some data';
        $identifier = 'MyIdentifier';
        $backend->set($identifier, $data);
        $fetchedData = $backend->get($identifier);
        $this->assertEquals($data, $fetchedData);
    }

    public function itIsPossibleToRemoveEntryFromCache() {
        $backend = $this->setUpBackend();
        $data = 'Some data';
        $identifier = 'MyIdentifier';
        $backend->set($identifier, $data);
        $backend->remove($identifier);
        $this->assertFalse($backend->has($identifier));
    }

    public function itIsPossibleToOverwriteAnEntryInTheCache() {
        $backend = $this->setUpBackend();
        $data = 'Some data';
        $identifier = 'MyIdentifier';
        $backend->set($identifier, $data);
        $otherData = 'some other data';
        $backend->set($identifier, $otherData);
        $fetchedData = $backend->get($identifier);
        $this->assertEquals($otherData, $fetchedData);
    }

    public function findIdentifiersByTagFindsSetEntries() {
        $backend = $this->setUpBackend();
        $data = 'Some data';
        $entryIdentifier = 'MyIdentifier';
        $backend->set($entryIdentifier, $data, array('UnitTestTag%tag1', 'UnitTestTag%tag2'));
        $retrieved = $backend->findIdentifiersByTag('UnitTestTag%tag1');
        $this->assertEquals($entryIdentifier, $retrieved[0]);
        $retrieved = $backend->findIdentifiersByTag('UnitTestTag%tag2');
        $this->assertEquals($entryIdentifier, $retrieved[0]);
    }

    public function setRemovesTagsFromPreviousSet() {
        $backend = $this->setUpBackend();
        $data = 'Some data';
        $entryIdentifier = 'MyIdentifier';
        $backend->set($entryIdentifier, $data, array('UnitTestTag%tag1', 'UnitTestTag%tag2'));
        $backend->set($entryIdentifier, $data, array('UnitTestTag%tag3'));
        $retrieved = $backend->findIdentifiersByTag('UnitTestTag%tag2');
        $this->assertEquals(array(), $retrieved);
    }

    public function setOverwritesExistingEntryThatExceededItsLifetimeWithNewData() {
        $backend = $this->setUpBackend();
        $data1 = 'data1';
        $entryIdentifier = $this->getUniqueId('test');
        $backend->set($entryIdentifier, $data1, array(), 1);
        $data2 = 'data2';
        $GLOBALS['EXEC_TIME'] += 2;
        $backend->set($entryIdentifier, $data2, array(), 10);
        $this->assertEquals($data2, $backend->get($entryIdentifier));
    }

    public function hasReturnsFalseIfTheEntryDoesntExist() {
        $backend = $this->setUpBackend();
        $identifier = 'NonExistingIdentifier';
        $this->assertFalse($backend->has($identifier));
    }

    public function removeReturnsFalseIfTheEntryDoesntExist() {
        $backend = $this->setUpBackend();
        $identifier = 'NonExistingIdentifier';
        $this->assertFalse($backend->remove($identifier));
    }

    public function flushByTagRemovesCacheEntriesWithSpecifiedTag() {
        $backend = $this->setUpBackend();
        $data = 'some data' . microtime();
        $backend->set('PdoBackendTest1', $data, array('UnitTestTag%test', 'UnitTestTag%boring'));
        $backend->set('PdoBackendTest2', $data, array('UnitTestTag%test', 'UnitTestTag%special'));
        $backend->set('PdoBackendTest3', $data, array('UnitTestTag%test'));
        $backend->flushByTag('UnitTestTag%special');
        $this->assertTrue($backend->has('PdoBackendTest1'), 'PdoBackendTest1');
        $this->assertFalse($backend->has('PdoBackendTest2'), 'PdoBackendTest2');
        $this->assertTrue($backend->has('PdoBackendTest3'), 'PdoBackendTest3');
    }

    public function flushRemovesAllCacheEntries() {
        $backend = $this->setUpBackend();
        $data = 'some data' . microtime();
        $backend->set('PdoBackendTest1', $data);
        $backend->set('PdoBackendTest2', $data);
        $backend->set('PdoBackendTest3', $data);
        $backend->flush();
        $this->assertFalse($backend->has('PdoBackendTest1'), 'PdoBackendTest1');
        $this->assertFalse($backend->has('PdoBackendTest2'), 'PdoBackendTest2');
        $this->assertFalse($backend->has('PdoBackendTest3'), 'PdoBackendTest3');
    }

    public function flushRemovesOnlyOwnEntries() {
        $thisCache = $this->getMock('TYPO3\\CMS\\Core\\Cache\\Frontend\\FrontendInterface', array(), array(), '', FALSE);
        $thisCache->expects($this->any())->method('getIdentifier')->will($this->returnValue('thisCache'));
        $thisBackend = $this->setUpBackend();
        $thisBackend->setCache($thisCache);
        $thatCache = $this->getMock('TYPO3\\CMS\\Core\\Cache\\Frontend\\FrontendInterface', array(), array(), '', FALSE);
        $thatCache->expects($this->any())->method('getIdentifier')->will($this->returnValue('thatCache'));
        $thatBackend = $this->setUpBackend();
        $thatBackend->setCache($thatCache);
        $thisBackend->set('thisEntry', 'Hello');
        $thatBackend->set('thatEntry', 'World!');
        $thatBackend->flush();
        $this->assertEquals('Hello', $thisBackend->get('thisEntry'));
        $this->assertFalse($thatBackend->has('thatEntry'));
    }

    public function collectGarbageReallyRemovesAnExpiredCacheEntry() {
        $backend = $this->setUpBackend();
        $data = 'some data' . microtime();
        $entryIdentifier = 'BackendPDORemovalTest';
        $backend->set($entryIdentifier, $data, array(), 1);
        $this->assertTrue($backend->has($entryIdentifier));
        $GLOBALS['EXEC_TIME'] += 2;
        $backend->collectGarbage();
        $this->assertFalse($backend->has($entryIdentifier));
    }

    public function collectGarbageReallyRemovesAllExpiredCacheEntries() {
        $backend = $this->setUpBackend();
        $data = 'some data' . microtime();
        $entryIdentifier = 'BackendPDORemovalTest';
        $backend->set($entryIdentifier . 'A', $data, array(), NULL);
        $backend->set($entryIdentifier . 'B', $data, array(), 10);
        $backend->set($entryIdentifier . 'C', $data, array(), 1);
        $backend->set($entryIdentifier . 'D', $data, array(), 1);
        $this->assertTrue($backend->has($entryIdentifier . 'A'));
        $this->assertTrue($backend->has($entryIdentifier . 'B'));
        $this->assertTrue($backend->has($entryIdentifier . 'C'));
        $this->assertTrue($backend->has($entryIdentifier . 'D'));
        $GLOBALS['EXEC_TIME'] += 2;
        $backend->collectGarbage();
        $this->assertTrue($backend->has($entryIdentifier . 'A'));
        $this->assertTrue($backend->has($entryIdentifier . 'B'));
        $this->assertFalse($backend->has($entryIdentifier . 'C'));
        $this->assertFalse($backend->has($entryIdentifier . 'D'));
    }

    protected function setUpBackend() {
        $mockCache = $this->getMock('TYPO3\\CMS\\Core\\Cache\\Frontend\\FrontendInterface', array(), array(), '', FALSE);
        $mockCache->expects($this->any())->method('getIdentifier')->will($this->returnValue('TestCache'));
        $backend = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance('TYPO3\\CMS\\Core\\Cache\\Backend\\PdoBackend', 'Testing');
        $backend->setCache($mockCache);
        $backend->setDataSourceName('sqlite::memory:');
        $backend->initializeObject();
        return $backend;
    }

}