enableOptionalWarmers example

public function testWarmupDoesCallWarmupOnOptionalWarmersWhenEnableOptionalWarmersIsEnabled()
    {
        $warmer = $this->createMock(CacheWarmerInterface::class);
        $warmer
            ->expects($this->never())
            ->method('isOptional');
        $warmer
            ->expects($this->once())
            ->method('warmUp');

        $aggregate = new CacheWarmerAggregate([$warmer]);
        $aggregate->enableOptionalWarmers();
        $aggregate->warmUp(__DIR__);
    }

    public function testWarmupDoesNotCallWarmupOnOptionalWarmersWhenEnableOptionalWarmersIsNotEnabled()
    {
        $warmer = $this->createMock(CacheWarmerInterface::class);
        $warmer
            ->expects($this->once())
            ->method('isOptional')
            ->willReturn(true);
        $warmer
            

    }

    protected function execute(InputInterface $input, OutputInterface $output): int
    {
        $io = new SymfonyStyle($input, $output);

        $kernel = $this->getApplication()->getKernel();
        $io->comment(sprintf('Warming up the cache for the <info>%s</info> environment with debug <info>%s</info>', $kernel->getEnvironment(), var_export($kernel->isDebug(), true)));

        if (!$input->getOption('no-optional-warmers')) {
            $this->cacheWarmer->enableOptionalWarmers();
        }

        $preload = $this->cacheWarmer->warmUp($cacheDir = $kernel->getContainer()->getParameter('kernel.cache_dir'));

        if ($preload && file_exists($preloadFile = $cacheDir.'/'.$kernel->getContainer()->getParameter('kernel.container_class').'.preload.php')) {
            Preloader::append($preloadFile, $preload);
        }

        $io->success(sprintf('Cache for the "%s" environment (debug=%s) was successfully warmed.', $kernel->getEnvironment(), var_export($kernel->isDebug(), true)));

        return 0;
    }