TransientMemoryBackendTest.php

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

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

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

    public function itIsPossibleToSetAndCheckExistenceInCache() {
        $cache = $this->getMock('TYPO3\\CMS\\Core\\Cache\\Frontend\\FrontendInterface', array(), array(), '', FALSE);
        $backend = new \TYPO3\CMS\Core\Cache\Backend\TransientMemoryBackend('Testing');
        $backend->setCache($cache);
        $data = 'Some data';
        $identifier = 'MyIdentifier';
        $backend->set($identifier, $data);
        $inCache = $backend->has($identifier);
        $this->assertTrue($inCache);
    }

    public function itIsPossibleToSetAndGetEntry() {
        $cache = $this->getMock('TYPO3\\CMS\\Core\\Cache\\Frontend\\FrontendInterface', array(), array(), '', FALSE);
        $backend = new \TYPO3\CMS\Core\Cache\Backend\TransientMemoryBackend('Testing');
        $backend->setCache($cache);
        $data = 'Some data';
        $identifier = 'MyIdentifier';
        $backend->set($identifier, $data);
        $fetchedData = $backend->get($identifier);
        $this->assertEquals($data, $fetchedData);
    }

    public function itIsPossibleToRemoveEntryFromCache() {
        $cache = $this->getMock('TYPO3\\CMS\\Core\\Cache\\Frontend\\FrontendInterface', array(), array(), '', FALSE);
        $backend = new \TYPO3\CMS\Core\Cache\Backend\TransientMemoryBackend('Testing');
        $backend->setCache($cache);
        $data = 'Some data';
        $identifier = 'MyIdentifier';
        $backend->set($identifier, $data);
        $backend->remove($identifier);
        $inCache = $backend->has($identifier);
        $this->assertFalse($inCache);
    }

    public function itIsPossibleToOverwriteAnEntryInTheCache() {
        $cache = $this->getMock('TYPO3\\CMS\\Core\\Cache\\Frontend\\FrontendInterface', array(), array(), '', FALSE);
        $backend = new \TYPO3\CMS\Core\Cache\Backend\TransientMemoryBackend('Testing');
        $backend->setCache($cache);
        $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 findIdentifiersByTagFindsCacheEntriesWithSpecifiedTag() {
        $cache = $this->getMock('TYPO3\\CMS\\Core\\Cache\\Frontend\\FrontendInterface', array(), array(), '', FALSE);
        $backend = new \TYPO3\CMS\Core\Cache\Backend\TransientMemoryBackend('Testing');
        $backend->setCache($cache);
        $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 hasReturnsFalseIfTheEntryDoesntExist() {
        $cache = $this->getMock('TYPO3\\CMS\\Core\\Cache\\Frontend\\FrontendInterface', array(), array(), '', FALSE);
        $backend = new \TYPO3\CMS\Core\Cache\Backend\TransientMemoryBackend('Testing');
        $backend->setCache($cache);
        $identifier = 'NonExistingIdentifier';
        $inCache = $backend->has($identifier);
        $this->assertFalse($inCache);
    }

    public function removeReturnsFalseIfTheEntryDoesntExist() {
        $cache = $this->getMock('TYPO3\\CMS\\Core\\Cache\\Frontend\\FrontendInterface', array(), array(), '', FALSE);
        $backend = new \TYPO3\CMS\Core\Cache\Backend\TransientMemoryBackend('Testing');
        $backend->setCache($cache);
        $identifier = 'NonExistingIdentifier';
        $inCache = $backend->remove($identifier);
        $this->assertFalse($inCache);
    }

    public function flushByTagRemovesCacheEntriesWithSpecifiedTag() {
        $cache = $this->getMock('TYPO3\\CMS\\Core\\Cache\\Frontend\\FrontendInterface', array(), array(), '', FALSE);
        $backend = new \TYPO3\CMS\Core\Cache\Backend\TransientMemoryBackend('Testing');
        $backend->setCache($cache);
        $data = 'some data' . microtime();
        $backend->set('TransientMemoryBackendTest1', $data, array('UnitTestTag%test', 'UnitTestTag%boring'));
        $backend->set('TransientMemoryBackendTest2', $data, array('UnitTestTag%test', 'UnitTestTag%special'));
        $backend->set('TransientMemoryBackendTest3', $data, array('UnitTestTag%test'));
        $backend->flushByTag('UnitTestTag%special');
        $this->assertTrue($backend->has('TransientMemoryBackendTest1'), 'TransientMemoryBackendTest1');
        $this->assertFalse($backend->has('TransientMemoryBackendTest2'), 'TransientMemoryBackendTest2');
        $this->assertTrue($backend->has('TransientMemoryBackendTest3'), 'TransientMemoryBackendTest3');
    }

    public function flushRemovesAllCacheEntries() {
        $cache = $this->getMock('TYPO3\\CMS\\Core\\Cache\\Frontend\\FrontendInterface', array(), array(), '', FALSE);
        $backend = new \TYPO3\CMS\Core\Cache\Backend\TransientMemoryBackend('Testing');
        $backend->setCache($cache);
        $data = 'some data' . microtime();
        $backend->set('TransientMemoryBackendTest1', $data);
        $backend->set('TransientMemoryBackendTest2', $data);
        $backend->set('TransientMemoryBackendTest3', $data);
        $backend->flush();
        $this->assertFalse($backend->has('TransientMemoryBackendTest1'), 'TransientMemoryBackendTest1');
        $this->assertFalse($backend->has('TransientMemoryBackendTest2'), 'TransientMemoryBackendTest2');
        $this->assertFalse($backend->has('TransientMemoryBackendTest3'), 'TransientMemoryBackendTest3');
    }

}