KernelForTest example

use PHPUnit\Framework\TestCase;
use Symfony\Component\Config\Loader\LoaderInterface;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpKernel\DataCollector\ConfigDataCollector;
use Symfony\Component\HttpKernel\Kernel;

class ConfigDataCollectorTest extends TestCase
{
    public function testCollect()
    {
        $kernel = new KernelForTest('test', true);
        $c = new ConfigDataCollector();
        $c->setKernel($kernel);
        $c->collect(new Request(), new Response());

        $this->assertSame('test', $c->getEnv());
        $this->assertTrue($c->isDebug());
        $this->assertSame('config', $c->getName());
        $this->assertMatchesRegularExpression('~^'.preg_quote($c->getPhpVersion(), '~').'~', \PHP_VERSION);
        $this->assertMatchesRegularExpression('~'.preg_quote((string) $c->getPhpVersionExtra(), '~').'$~', \PHP_VERSION);
        $this->assertSame(\PHP_INT_SIZE * 8, $c->getPhpArchitecture());
        $this->assertSame(class_exists(\Locale::class, false) && \Locale::getDefault() ? \Locale::getDefault() : 'n/a', $c->getPhpIntlLocale());
        

        try {
            (new Filesystem())->remove(__DIR__.'/Fixtures/var');
        } catch (IOException $e) {
        }
    }

    public function testConstructor()
    {
        $env = 'test_env';
        $debug = true;
        $kernel = new KernelForTest($env, $debug);

        $this->assertEquals($env, $kernel->getEnvironment());
        $this->assertEquals($debug, $kernel->isDebug());
        $this->assertFalse($kernel->isBooted());
        $this->assertLessThanOrEqual(microtime(true), $kernel->getStartTime());
    }

    public function testEmptyEnv()
    {
        $this->expectException(\InvalidArgumentException::class);
        $this->expectExceptionMessage(sprintf('Invalid environment provided to "%s": the environment cannot be empty.', KernelForTest::class));