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());
$this
->assertNull($kernel
->getContainer());
}