Neos\Flow\Cache\Tests\Unit\Backend\ApcBackendTest::setRemovesTagsFromPreviousSet PHP Method

    public function setRemovesTagsFromPreviousSet()
    {
        $backend = $this->setUpBackend();
        $data = 'Some data';
        $identifier = 'MyIdentifier' . md5(uniqid(mt_rand(), true));
        $backend->set($identifier, $data, ['UnitTestTag%tag1', 'UnitTestTag%tagX']);
        $backend->set($identifier, $data, ['UnitTestTag%tag3']);
        $retrieved = $backend->findIdentifiersByTag('UnitTestTag%tagX');
        $this->assertEquals([], $retrieved, 'Found entry which should no longer exist.');
    }