ImportStorageTransformerTest.php

<?php

namespace Drupal\KernelTests\Core\Config;

use Drupal\Core\Config\ConfigImporter;
use Drupal\Core\Config\ImportStorageTransformer;
use Drupal\Core\Config\MemoryStorage;
use Drupal\Core\Config\StorageTransformerException;
use Drupal\Core\Lock\NullLockBackend;
use Drupal\KernelTests\KernelTestBase;

/**
 * Tests the import storage transformer.
 *
 * @group config
 */
class ImportStorageTransformerTest extends KernelTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'system',
        'config_transformer_test',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->installConfig([
            'system',
        ]);
    }
    
    /**
     * Tests the import transformation.
     */
    public function testTransform() {
        // Get the raw system.site config and set it in the sync storage.
        $rawConfig = $this->config('system.site')
            ->getRawData();
        $storage = new MemoryStorage();
        $this->copyConfig($this->container
            ->get('config.storage'), $storage);
        $import = $this->container
            ->get('config.import_transformer')
            ->transform($storage);
        $config = $import->read('system.site');
        // The test subscriber always adds "Arrr" to the current site name.
        $this->assertEquals($rawConfig['name'] . ' Arrr', $config['name']);
        $this->assertEquals($rawConfig['slogan'], $config['slogan']);
        // Update the site config in the storage to test a second transformation.
        $config['name'] = 'New name';
        $config['slogan'] = 'New slogan';
        $storage->write('system.site', $config);
        $import = $this->container
            ->get('config.import_transformer')
            ->transform($storage);
        $config = $import->read('system.site');
        // The test subscriber always adds "Arrr" to the current site name.
        $this->assertEquals($rawConfig['name'] . ' Arrr', $config['name']);
        $this->assertEquals('New slogan', $config['slogan']);
    }
    
    /**
     * Tests that the import transformer throws an exception.
     */
    public function testTransformLocked() {
        // Mock the request lock not being available.
        $lock = $this->createMock('Drupal\\Core\\Lock\\LockBackendInterface');
        $lock->expects($this->exactly(2))
            ->method('acquire')
            ->with(ImportStorageTransformer::LOCK_NAME)
            ->willReturn(FALSE);
        $lock->expects($this->once())
            ->method('wait')
            ->with(ImportStorageTransformer::LOCK_NAME);
        // The import transformer under test.
        $transformer = new ImportStorageTransformer($this->container
            ->get('event_dispatcher'), $this->container
            ->get('database'), $lock, new NullLockBackend());
        $this->expectException(StorageTransformerException::class);
        $this->expectExceptionMessage("Cannot acquire config import transformer lock.");
        $transformer->transform(new MemoryStorage());
    }
    
    /**
     * Tests the import transformer during a running config import.
     */
    public function testTransformWhileImporting() {
        // Set up the database table with the current active config.
        // This simulates the config importer having its transformation done.
        $storage = $this->container
            ->get('config.import_transformer')
            ->transform($this->container
            ->get('config.storage'));
        // Mock the persistent lock being unavailable due to a config import.
        $lock = $this->createMock('Drupal\\Core\\Lock\\LockBackendInterface');
        $lock->expects($this->once())
            ->method('lockMayBeAvailable')
            ->with(ConfigImporter::LOCK_NAME)
            ->willReturn(FALSE);
        // The import transformer under test.
        $transformer = new ImportStorageTransformer($this->container
            ->get('event_dispatcher'), $this->container
            ->get('database'), new NullLockBackend(), $lock);
        // Transform an empty memory storage.
        $import = $transformer->transform(new MemoryStorage());
        // Assert that the transformed storage is the same as the one used to
        // set up the simulated config importer.
        $this->assertEquals($storage->listAll(), $import->listAll());
        $this->assertNotEmpty($import->read('system.site'));
    }

}