public function createInjectsAnInstanceOfTheSpecifiedBackendIntoTheCacheFrontend()
{
$factory = new CacheFactory(new ApplicationContext('Testing'), $this->mockEnvironment);
$factory->injectEnvironmentConfiguration($this->mockEnvironmentConfiguration);
$cache = $factory->create('TYPO3_Flow_Cache_FactoryTest_Cache', VariableFrontend::class, FileBackend::class);
$this->assertInstanceOf(FileBackend::class, $cache->getBackend());
}