AutowireTest.php

<?php

namespace Drupal\KernelTests\Core\DependencyInjection;

use Drupal\autowire_test\TestInjection;
use Drupal\autowire_test\TestInjection2;
use Drupal\autowire_test\TestInjection3;
use Drupal\autowire_test\TestService;
use Drupal\Core\Controller\ControllerBase;
use Drupal\Core\Database\Connection;
use Drupal\Core\DrupalKernelInterface;
use Drupal\Core\Security\TrustedCallbackInterface;
use Drupal\Core\Serialization\Yaml;
use Drupal\KernelTests\FileSystemModuleDiscoveryDataProviderTrait;
use Drupal\KernelTests\KernelTestBase;

/**
 * Tests auto-wiring services.
 *
 * @group DependencyInjection
 */
class AutowireTest extends KernelTestBase {
    use FileSystemModuleDiscoveryDataProviderTrait;
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'autowire_test',
    ];
    
    /**
     * Tests that 'autowire_test.service' has its dependencies injected.
     */
    public function testAutowire() : void {
        $service = $this->container
            ->get(TestService::class);
        // Ensure an autowired interface works.
        $this->assertInstanceOf(TestInjection::class, $service->getTestInjection());
        $this->assertInstanceOf(TestInjection3::class, $service->getTestInjection3());
        // Ensure an autowired class works.
        $this->assertInstanceOf(TestInjection2::class, $service->getTestInjection2());
        // Ensure an autowired core class works.
        $this->assertInstanceOf(Connection::class, $service->getDatabase());
        // Ensure an autowired core synthetic class works.
        $this->assertInstanceOf(DrupalKernelInterface::class, $service->getKernel());
    }
    
    /**
     * Tests that core services have aliases correctly defined where possible.
     */
    public function testCoreServiceAliases() : void {
        $services = [];
        $aliases = [];
        $filenames = array_map(fn($module) => "core/modules/{$module[0]}/{$module[0]}.services.yml", $this->coreModuleListDataProvider());
        $filenames[] = 'core/core.services.yml';
        foreach (array_filter($filenames, 'file_exists') as $filename) {
            foreach (Yaml::decode(file_get_contents($filename))['services'] as $id => $service) {
                if (is_string($service)) {
                    $aliases[$id] = substr($service, 1);
                }
                elseif (isset($service['class']) && class_exists($service['class'])) {
                    // Ignore certain tagged services.
                    if (isset($service['tags'])) {
                        foreach ($service['tags'] as $tag) {
                            if (in_array($tag['name'], [
                                'access_check',
                                'cache.context',
                                'context_provider',
                                'event_subscriber',
                                'module_install.uninstall_validator',
                            ])) {
                                continue 2;
                            }
                        }
                    }
                    $services[$id] = $service['class'];
                }
            }
        }
        $interfaces = [];
        foreach (get_declared_classes() as $class) {
            // Ignore proxy classes for autowiring purposes.
            if (str_contains($class, '\\ProxyClass\\')) {
                continue;
            }
            foreach (class_implements($class) as $interface) {
                $interfaces[$interface][] = $class;
            }
        }
        $expected = [];
        foreach ($services as $id => $class) {
            // Skip services that share a class.
            if (count(array_keys($services, $class)) > 1) {
                continue;
            }
            // Expect standalone classes to be aliased.
            $implements = class_implements($class);
            if (!$implements) {
                $expected[$class] = $id;
            }
            elseif (count($implements) === 1 && TrustedCallbackInterface::class === reset($implements)) {
                // Classes implementing only TrustedCallbackInterface should be aliased.
                $expected[$class] = $id;
            }
            // Expect classes that are the only implementation of their interface to
            // be aliased.
            foreach ($implements as $interface) {
                if (count($interfaces[$interface]) === 1) {
                    $expected[$interface] = $id;
                }
            }
        }
        $missing = array_diff($expected, $aliases);
        $formatted = Yaml::encode(array_map(fn($alias) => sprintf('@%s', $alias), $missing));
        $this->assertSame($expected, array_intersect($expected, $aliases), sprintf('The following core services do not have map the class name to an alias. Add the following to core.services.yml in the appropriate place: %s%s%s', \PHP_EOL, \PHP_EOL, $formatted));
    }
    
    /**
     * Tests that core controllers are autowired where possible.
     */
    public function testCoreControllerAutowiring() : void {
        $services = [];
        $aliases = [];
        $filenames = array_map(fn($module) => "core/modules/{$module[0]}/{$module[0]}.services.yml", $this->coreModuleListDataProvider());
        $filenames[] = 'core/core.services.yml';
        foreach (array_filter($filenames, 'file_exists') as $filename) {
            foreach (Yaml::decode(file_get_contents($filename))['services'] as $id => $service) {
                if (is_string($service)) {
                    $aliases[$id] = substr($service, 1);
                }
            }
        }
        $controllers = [];
        $filenames = array_map(fn($module) => "core/modules/{$module[0]}/{$module[0]}.routing.yml", $this->coreModuleListDataProvider());
        foreach (array_filter($filenames, 'file_exists') as $filename) {
            foreach (Yaml::decode(file_get_contents($filename)) as $route) {
                if (isset($route['defaults']['_controller'])) {
                    [
                        $class,
                    ] = explode('::', $route['defaults']['_controller'], 2);
                    $controllers[$class] = $class;
                }
            }
        }
        $autowire = [];
        foreach ($controllers as $controller) {
            if (!is_subclass_of($controller, ControllerBase::class)) {
                continue;
            }
            if (!method_exists($controller, '__construct') || !method_exists($controller, 'create')) {
                continue;
            }
            if ((new \ReflectionClass($controller))->getMethod('create')->class !== ltrim($controller, '\\')) {
                continue;
            }
            $constructor = new \ReflectionMethod($controller, '__construct');
            foreach ($constructor->getParameters() as $pos => $parameter) {
                $interface = (string) $parameter->getType();
                if (!isset($aliases[$interface])) {
                    continue 2;
                }
            }
            $autowire[] = $controller;
        }
        $this->assertEmpty($autowire, 'The following core controllers can be autowired. Remove the create() method:' . PHP_EOL . implode(PHP_EOL, $autowire));
    }

}