MigrationPluginManagerTest.php

<?php

declare (strict_types=1);
namespace Drupal\Tests\migrate\Unit;

use Drupal\Core\Cache\CacheBackendInterface;
use Drupal\migrate\Plugin\Migration;
use Drupal\migrate\Plugin\MigrationPluginManager;
use Drupal\Tests\UnitTestCase;

/**
 * @coversDefaultClass \Drupal\migrate\Plugin\MigrationPluginManager
 * @group migrate
 */
class MigrationPluginManagerTest extends UnitTestCase {
    
    /**
     * A plugin manager.
     *
     * @var \Drupal\migrate\Plugin\MigrationPluginManager
     */
    protected $pluginManager;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        // Get a plugin manager for testing.
        $module_handler = $this->createMock('Drupal\\Core\\Extension\\ModuleHandlerInterface');
        $cache_backend = $this->createMock('Drupal\\Core\\Cache\\CacheBackendInterface');
        $language_manager = $this->createMock('Drupal\\Core\\Language\\LanguageManagerInterface');
        $this->pluginManager = new MigrationPluginManager($module_handler, $cache_backend, $language_manager);
    }
    
    /**
     * Tests building dependencies for multiple migrations.
     *
     * @dataProvider dependencyProvider
     */
    public function testDependencyBuilding($migrations_data, $result_ids) : void {
        $migrations = [];
        foreach ($migrations_data as $migration_id => $migration_data) {
            $migrations[$migration_id] = new TestMigrationMock($migration_id, $migration_data['migration_dependencies']);
        }
        $ordered_migrations = $this->pluginManager
            ->buildDependencyMigration($migrations, []);
        // Verify results.
        $this->assertEquals($result_ids, array_keys($ordered_migrations));
        foreach ($migrations_data as $migration_id => $migration_data) {
            $migration = $migrations[$migration_id];
            $requirements = $migration_data['result_requirements'];
            if (empty($requirements)) {
                $this->assertEquals([], $migration->set);
            }
            else {
                $requirements = array_combine($requirements, $requirements);
                $this->assertCount(1, $migration->set);
                [
                    $set_prop,
                    $set_requirements,
                ] = reset($migration->set);
                $this->assertEquals('requirements', $set_prop);
                $this->assertEquals($requirements, $set_requirements);
            }
        }
    }
    
    /**
     * Tests that expandPluginIds returns all derivatives.
     */
    public function testExpandPluginIds() : void {
        $backend = $this->prophesize(CacheBackendInterface::class);
        $cache = new \stdClass();
        $cache->data = [
            'a:a' => [
                'provider' => 'core',
            ],
            'a:b' => [
                'provider' => 'core',
            ],
            'b' => [
                'provider' => 'core',
            ],
        ];
        $backend->get('migration_plugins')
            ->willReturn($cache);
        $this->pluginManager
            ->setCacheBackend($backend->reveal(), 'migration_plugins');
        $plugin_ids = $this->pluginManager
            ->expandPluginIds([
            'b',
            'a',
        ]);
        $this->assertContains('a:a', $plugin_ids);
        $this->assertContains('a:b', $plugin_ids);
        $this->assertContains('b', $plugin_ids);
    }
    
    /**
     * Provide dependency data for testing.
     */
    public static function dependencyProvider() {
        return [
            // Just one migration, with no dependencies.
[
                [
                    'm1' => [
                        'migration_dependencies' => [],
                        'result_requirements' => [],
                    ],
                ],
                [
                    'm1',
                ],
            ],
            // Just one migration, with required dependencies.
[
                [
                    'm1' => [
                        'migration_dependencies' => [
                            'required' => [
                                'required1',
                                'required2',
                            ],
                        ],
                        'result_requirements' => [
                            'required1',
                            'required2',
                        ],
                    ],
                ],
                [
                    'm1',
                ],
            ],
            // Just one migration, with optional dependencies.
[
                [
                    'm1' => [
                        'migration_dependencies' => [
                            'optional' => [
                                'optional1',
                            ],
                        ],
                        'result_requirements' => [],
                    ],
                ],
                [
                    'm1',
                ],
            ],
            // Multiple migrations.
[
                [
                    'm1' => [
                        'migration_dependencies' => [
                            'required' => [
                                'required1',
                                'required2',
                            ],
                        ],
                        'result_requirements' => [
                            'required1',
                            'required2',
                        ],
                    ],
                    'm2' => [
                        'migration_dependencies' => [
                            'optional' => [
                                'optional1',
                            ],
                        ],
                        'result_requirements' => [],
                    ],
                ],
                [
                    'm1',
                    'm2',
                ],
            ],
            // Multiple migrations, reordered due to optional requirement.
[
                [
                    'm1' => [
                        'migration_dependencies' => [
                            'optional' => [
                                'm2',
                            ],
                        ],
                        'result_requirements' => [],
                    ],
                    'm2' => [
                        'migration_dependencies' => [
                            'optional' => [
                                'optional1',
                            ],
                        ],
                        'result_requirements' => [],
                    ],
                ],
                [
                    'm2',
                    'm1',
                ],
            ],
            // Ensure that optional requirements aren't turned into required ones,
            // if the last migration has no optional deps.
[
                [
                    'm1' => [
                        'migration_dependencies' => [
                            'optional' => [
                                'm2',
                            ],
                        ],
                        'result_requirements' => [],
                    ],
                    'm2' => [
                        'migration_dependencies' => [],
                        'result_requirements' => [],
                    ],
                ],
                [
                    'm2',
                    'm1',
                ],
            ],
        ];
    }

}

/**
 * A mock migration plugin.
 *
 * Why are we using a custom class here?
 *
 * 1. The function buildDependencyMigration() calls $migration->set(), which
 * is not actually in MigrationInterface.
 *
 * 2. The function buildDependencyMigration() calls array_multisort on an
 * array with mocks in it. PHPUnit mocks are really complex, and if PHP tries
 * to compare them it will die with "Nesting level too deep".
 */
class TestMigrationMock extends Migration {
    
    /**
     * The values passed into set().
     *
     * @var array
     */
    public $set = [];
    
    /**
     * TestMigrationMock constructor.
     */
    public function __construct($id, $migration_dependencies) {
        // Intentionally ignore parent constructor.
        $this->id = $id;
        $this->migration_dependencies = $migration_dependencies;
    }
    
    /**
     * {@inheritdoc}
     */
    public function id() {
        return $this->id;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getMigrationDependencies() {
        // For the purpose of testing, do not expand dependencies.
        return $this->migration_dependencies;
    }
    
    /**
     * {@inheritdoc}
     */
    public function set($prop, $value) : void {
        $this->set[] = func_get_args();
    }

}