DrupalKernelTest.php

<?php

namespace Drupal\KernelTests\Core\DrupalKernel;

use Drupal\Core\DrupalKernel;
use Drupal\Core\DrupalKernelInterface;
use Drupal\KernelTests\KernelTestBase;
use Symfony\Component\HttpFoundation\Request;

/**
 * Tests DIC compilation to disk.
 *
 * @group DrupalKernel
 */
class DrupalKernelTest extends KernelTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() {
        // DrupalKernel relies on global $config_directories and requires those
        // directories to exist. Therefore, create the directories, but do not
        // invoke KernelTestBase::setUp(), since that would set up further
        // environment aspects, which would distort this test, because it tests
        // the DrupalKernel (re-)building itself.
        $this->root = static::getDrupalRoot();
        $this->bootEnvironment();
    }
    
    /**
     * Build a kernel for testings.
     *
     * Because the bootstrap is in DrupalKernel::boot and that involved loading
     * settings from the filesystem we need to go to extra lengths to build a kernel
     * for testing.
     *
     * @param \Symfony\Component\HttpFoundation\Request $request
     *   A request object to use in booting the kernel.
     * @param array $modules_enabled
     *   A list of modules to enable on the kernel.
     *
     * @return \Drupal\Core\DrupalKernel
     *   New kernel for testing.
     */
    protected function getTestKernel(Request $request, array $modules_enabled = NULL) {
        // Manually create kernel to avoid replacing settings.
        $class_loader = (require $this->root . '/autoload.php');
        $kernel = DrupalKernel::createFromRequest($request, $class_loader, 'testing');
        $this->setSetting('container_yamls', []);
        $this->setSetting('hash_salt', $this->databasePrefix);
        if (isset($modules_enabled)) {
            $kernel->updateModules($modules_enabled);
        }
        $kernel->boot();
        return $kernel;
    }
    
    /**
     * Tests DIC compilation.
     */
    public function testCompileDIC() {
        // @todo: write a memory based storage backend for testing.
        $modules_enabled = [
            'system' => 'system',
            'user' => 'user',
        ];
        $request = Request::createFromGlobals();
        $this->getTestKernel($request, $modules_enabled);
        // Instantiate it a second time and we should get the compiled Container
        // class.
        $kernel = $this->getTestKernel($request);
        $container = $kernel->getContainer();
        $refClass = new \ReflectionClass($container);
        $is_compiled_container = !$refClass->isSubclassOf('Symfony\\Component\\DependencyInjection\\ContainerBuilder');
        $this->assertTrue($is_compiled_container);
        // Verify that the list of modules is the same for the initial and the
        // compiled container.
        $module_list = array_keys($container->get('module_handler')
            ->getModuleList());
        $this->assertEqual(array_values($modules_enabled), $module_list);
        // Get the container another time, simulating a "production" environment.
        $container = $this->getTestKernel($request, NULL)
            ->getContainer();
        $refClass = new \ReflectionClass($container);
        $is_compiled_container = !$refClass->isSubclassOf('Symfony\\Component\\DependencyInjection\\ContainerBuilder');
        $this->assertTrue($is_compiled_container);
        // Verify that the list of modules is the same for the initial and the
        // compiled container.
        $module_list = array_keys($container->get('module_handler')
            ->getModuleList());
        $this->assertEqual(array_values($modules_enabled), $module_list);
        // Test that our synthetic services are there.
        $class_loader = $container->get('class_loader');
        $refClass = new \ReflectionClass($class_loader);
        $this->assertTrue($refClass->hasMethod('loadClass'), 'Container has a class loader');
        // We make this assertion here purely to show that the new container below
        // is functioning correctly, i.e. we get a brand new ContainerBuilder
        // which has the required new services, after changing the list of enabled
        // modules.
        $this->assertFalse($container->has('service_provider_test_class'));
        // Add another module so that we can test that the new module's bundle is
        // registered to the new container.
        $modules_enabled['service_provider_test'] = 'service_provider_test';
        $this->getTestKernel($request, $modules_enabled);
        // Instantiate it a second time and we should not get a ContainerBuilder
        // class because we are loading the container definition from cache.
        $kernel = $this->getTestKernel($request, $modules_enabled);
        $container = $kernel->getContainer();
        $refClass = new \ReflectionClass($container);
        $is_container_builder = $refClass->isSubclassOf('Symfony\\Component\\DependencyInjection\\ContainerBuilder');
        $this->assertFalse($is_container_builder, 'Container is not a builder');
        // Assert that the new module's bundle was registered to the new container.
        $this->assertTrue($container->has('service_provider_test_class'), 'Container has test service');
        // Test that our synthetic services are there.
        $class_loader = $container->get('class_loader');
        $refClass = new \ReflectionClass($class_loader);
        $this->assertTrue($refClass->hasMethod('loadClass'), 'Container has a class loader');
        // Check that the location of the new module is registered.
        $modules = $container->getParameter('container.modules');
        $this->assertEqual($modules['service_provider_test'], [
            'type' => 'module',
            'pathname' => drupal_get_filename('module', 'service_provider_test'),
            'filename' => NULL,
        ]);
        // Check that the container itself is not among the persist IDs because it
        // does not make sense to persist the container itself.
        $persist_ids = $container->getParameter('persist_ids');
        $this->assertNotContains('service_container', $persist_ids);
    }
    
    /**
     * Tests repeated loading of compiled DIC with different environment.
     */
    public function testRepeatedBootWithDifferentEnvironment() {
        $request = Request::createFromGlobals();
        $class_loader = (require $this->root . '/autoload.php');
        $environments = [
            'testing1',
            'testing1',
            'testing2',
            'testing2',
        ];
        foreach ($environments as $environment) {
            $kernel = DrupalKernel::createFromRequest($request, $class_loader, $environment);
            $this->setSetting('container_yamls', []);
            $this->setSetting('hash_salt', $this->databasePrefix);
            $this->assertInstanceOf(DrupalKernelInterface::class, $kernel->boot(), "Environment {$environment} should boot.");
        }
    }
    
    /**
     * Tests setting of site path after kernel boot.
     */
    public function testPreventChangeOfSitePath() {
        // @todo: write a memory based storage backend for testing.
        $modules_enabled = [
            'system' => 'system',
            'user' => 'user',
        ];
        $request = Request::createFromGlobals();
        $kernel = $this->getTestKernel($request, $modules_enabled);
        $pass = FALSE;
        try {
            $kernel->setSitePath('/dev/null');
        } catch (\LogicException $e) {
            $pass = TRUE;
        }
        $this->assertTrue($pass, 'Throws LogicException if DrupalKernel::setSitePath() is called after boot');
        // Ensure no LogicException if DrupalKernel::setSitePath() is called with
        // identical path after boot.
        $path = $kernel->getSitePath();
        $kernel->setSitePath($path);
    }
    
    /**
     * @group legacy
     * @expectedDeprecation Drupal\Core\DrupalKernel::prepareLegacyRequest is deprecated drupal:8.0.0 and is removed from drupal:9.0.0. Use DrupalKernel::boot() and DrupalKernel::preHandle() instead. See https://www.drupal.org/node/3070678
     */
    public function testPrepareLegacyRequest() {
        $request = Request::createFromGlobals();
        // Manually create kernel to avoid replacing settings.
        $class_loader = (require $this->root . '/autoload.php');
        $kernel = DrupalKernel::createFromRequest($request, $class_loader, 'testing');
        $this->setSetting('container_yamls', []);
        $this->setSetting('hash_salt', $this->databasePrefix);
        $this->assertNull($kernel->getContainer());
        // Restore the usual PHPUnit error handler for deprecation testing.
        restore_error_handler();
        $kernel->prepareLegacyRequest($request);
        $this->assertSame($request, $kernel->getContainer()
            ->get('request_stack')
            ->getMasterRequest());
    }

}