t3lib_cache_backend_apcbackendTest.php

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<?php
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/**
 * Testcase for the APC cache backend
 *
 * This file is a backport from FLOW3
 *
 * @author  Ingo Renner <ingo@typo3.org>
 * @package TYPO3
 * @subpackage tests
 * @version $Id: t3lib_cache_backend_apcbackendTest.php 10121 2011-01-18 20:15:30Z ohader $
 */
class t3lib_cache_backend_ApcBackendTest extends tx_phpunit_testcase {

    /**
     * Sets up this testcase
     *
     * @return void
     * @author Karsten Dambekalns <karsten@typo3.org>
     * @author Ingo Renner <ingo@typo3.org>
     */
    public function setUp() {
        if (!extension_loaded('apc')) {
            $this->markTestSkipped('APC extension was not available');
        }

        if (ini_get('apc.slam_defense') == 1) {
            $this->markTestSkipped('This testcase can only be executed with apc.slam_defense = Off');
        }
    }

    /**
     * @test
     * @author Christian Jul Jensen <julle@typo3.org>
     * @author Karsten Dambekalns <karsten@typo3.org>
     * @expectedException t3lib_cache_Exception
     */
    public function setThrowsExceptionIfNoFrontEndHasBeenSet() {
        $backend = new t3lib_cache_backend_ApcBackend();
        $data = 'Some data';
        $identifier = uniqid('MyIdentifier');
        $backend->set($identifier, $data);
    }

    /**
     * @test
     * @author Christian Jul Jensen <julle@typo3.org>
     */
    public function itIsPossibleToSetAndCheckExistenceInCache() {
        $backend = $this->setUpBackend();
        $data = 'Some data';
        $identifier = uniqid('MyIdentifier');
        $backend->set($identifier, $data);
        $inCache = $backend->has($identifier);
        $this->assertTrue($inCache, 'APC backend failed to set and check entry');
    }

    /**
     * @test
     * @author Christian Jul Jensen <julle@typo3.org>
     */
    public function itIsPossibleToSetAndGetEntry() {
        $backend = $this->setUpBackend();
        $data = 'Some data';
        $identifier = uniqid('MyIdentifier');
        $backend->set($identifier, $data);
        $fetchedData = $backend->get($identifier);
        $this->assertEquals($data, $fetchedData, 'APC backend failed to set and retrieve data');
    }

    /**
     * @test
     * @author Christian Jul Jensen <julle@typo3.org>
     */
    public function itIsPossibleToRemoveEntryFromCache() {
        $backend = $this->setUpBackend();
        $data = 'Some data';
        $identifier = uniqid('MyIdentifier');
        $backend->set($identifier, $data);
        $backend->remove($identifier);
        $inCache = $backend->has($identifier);
        $this->assertFalse($inCache, 'Failed to set and remove data from APC backend');
    }

    /**
     * @test
     * @author Christian Jul Jensen <julle@typo3.org>
     */
    public function itIsPossibleToOverwriteAnEntryInTheCache() {
        $backend = $this->setUpBackend();
        $data = 'Some data';
        $identifier = uniqid('MyIdentifier');
        $backend->set($identifier, $data);
        $otherData = 'some other data';
        $backend->set($identifier, $otherData);
        $fetchedData = $backend->get($identifier);
        $this->assertEquals($otherData, $fetchedData, 'APC backend failed to overwrite and retrieve data');
    }

    /**
     * @test
     * @author Karsten Dambekalns <karsten@typo3.org>
     */
    public function findIdentifiersByTagFindsSetEntries() {
        $backend = $this->setUpBackend();

        $data = 'Some data';
        $identifier = uniqid('MyIdentifier');
        $backend->set($identifier, $data, array('UnitTestTag%tag1', 'UnitTestTag%tag2'));

        $retrieved = $backend->findIdentifiersByTag('UnitTestTag%tag1');
        $this->assertEquals($identifier, $retrieved[0], 'Could not retrieve expected entry by tag.');

        $retrieved = $backend->findIdentifiersByTag('UnitTestTag%tag2');
        $this->assertEquals($identifier, $retrieved[0], 'Could not retrieve expected entry by tag.');
    }

    /**
     * @test
     * @author Karsten Dambekalns <karsten@typo3.org>
     */
    public function setRemovesTagsFromPreviousSet() {
        $backend = $this->setUpBackend();

        $data = 'Some data';
        $identifier = uniqid('MyIdentifier');
        $backend->set($identifier, $data, array('UnitTestTag%tag1', 'UnitTestTag%tagX'));
        $backend->set($identifier, $data, array('UnitTestTag%tag3'));

        $retrieved = $backend->findIdentifiersByTag('UnitTestTag%tagX');
        $this->assertEquals(array(), $retrieved, 'Found entry which should no longer exist.');
    }

    /**
     * @test
     * @author Christian Jul Jensen <julle@typo3.org>
     */
    public function hasReturnsFalseIfTheEntryDoesntExist() {
        $backend = $this->setUpBackend();
        $identifier = uniqid('NonExistingIdentifier');
        $inCache = $backend->has($identifier);
        $this->assertFalse($inCache,'"has" did not return false when checking on non existing identifier');
    }

    /**
     * @test
     * @author Christian Jul Jensen <julle@typo3.org>
     */
    public function removeReturnsFalseIfTheEntryDoesntExist() {
        $backend = $this->setUpBackend();
        $identifier = uniqid('NonExistingIdentifier');
        $inCache = $backend->remove($identifier);
        $this->assertFalse($inCache,'"remove" did not return false when checking on non existing identifier');
    }

    /**
     * @test
     * @author Robert Lemke <robert@typo3.org>
     * @author Karsten Dambekalns <karsten@typo3.org>
     */
    public function flushByTagRemovesCacheEntriesWithSpecifiedTag() {
        $backend = $this->setUpBackend();

        $data = 'some data' . microtime();
        $backend->set('BackendAPCTest1', $data, array('UnitTestTag%test', 'UnitTestTag%boring'));
        $backend->set('BackendAPCTest2', $data, array('UnitTestTag%test', 'UnitTestTag%special'));
        $backend->set('BackendAPCTest3', $data, array('UnitTestTag%test'));

        $backend->flushByTag('UnitTestTag%special');

        $this->assertTrue($backend->has('BackendAPCTest1'), 'BackendAPCTest1');
        $this->assertFalse($backend->has('BackendAPCTest2'), 'BackendAPCTest2');
        $this->assertTrue($backend->has('BackendAPCTest3'), 'BackendAPCTest3');
    }

    /**
     * @test
     * @author Karsten Dambekalns <karsten@typo3.org>
     */
    public function flushRemovesAllCacheEntries() {
        $backend = $this->setUpBackend();

        $data = 'some data' . microtime();
        $backend->set('BackendAPCTest1', $data);
        $backend->set('BackendAPCTest2', $data);
        $backend->set('BackendAPCTest3', $data);

        $backend->flush();

        $this->assertFalse($backend->has('BackendAPCTest1'), 'BackendAPCTest1');
        $this->assertFalse($backend->has('BackendAPCTest2'), 'BackendAPCTest2');
        $this->assertFalse($backend->has('BackendAPCTest3'), 'BackendAPCTest3');
    }

    /**
     * @test
     * @author Karsten Dambekalns <karsten@typo3.org>
     * @author Ingo Renner <ingo@typo3.org>
     */
    public function flushRemovesOnlyOwnEntries() {
        $thisCache = $this->getMock('t3lib_cache_frontend_Frontend', array(), array(), '', FALSE);
        $thisCache->expects($this->any())->method('getIdentifier')->will($this->returnValue('thisCache'));
        $thisBackend = new t3lib_cache_backend_ApcBackend();
        $thisBackend->setCache($thisCache);

        $thatCache = $this->getMock('t3lib_cache_frontend_Frontend', array(), array(), '', FALSE);
        $thatCache->expects($this->any())->method('getIdentifier')->will($this->returnValue('thatCache'));
        $thatBackend = new t3lib_cache_backend_ApcBackend();
        $thatBackend->setCache($thatCache);

        $thisBackend->set('thisEntry', 'Hello');
        $thatBackend->set('thatEntry', 'World!');
        $thatBackend->flush();

        $this->assertEquals('Hello', $thisBackend->get('thisEntry'));
        $this->assertFalse($thatBackend->has('thatEntry'));
    }

    /**
     * Check if we can store ~5 MB of data
     *
     * @test
     * @author Karsten Dambekalns <karsten@typo3.org>
     */
    public function largeDataIsStored() {
        $backend = $this->setUpBackend();

        $data = str_repeat('abcde', 1024 * 1024);
        $identifier = uniqid('tooLargeData');
        $backend->set($identifier, $data);

        $this->assertTrue($backend->has($identifier));
        $this->assertEquals($backend->get($identifier), $data);
    }

    /**
     * Sets up the APC backend used for testing
     *
     * @param array $backendOptions Options for the APC backend
     * @return t3lib_cache_backend_ApcBackend
     * @author Karsten Dambekalns <karsten@typo3.org>
     * @author Ingo Renner <ingo@typo3.org>
     */
    protected function setUpBackend() {
        $cache = $this->getMock('t3lib_cache_frontend_Frontend', array(), array(), '', FALSE);
        $backend = new t3lib_cache_backend_ApcBackend();
        $backend->setCache($cache);

        return $backend;
    }
}

?>