class MigrateSourceDiscoveryTest

class MigrateSourceDiscoveryTest extends KernelTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'migrate',
    ];
    
    /**
     * @covers \Drupal\migrate\Plugin\MigrateSourcePluginManager::getDefinitions
     */
    public function testGetDefinitions() : void {
        // First, check the expected plugins are provided by migrate only.
        $expected = [
            'embedded_data',
            'empty',
        ];
        $source_plugins = \Drupal::service('plugin.manager.migrate.source')->getDefinitions();
        ksort($source_plugins);
        $this->assertSame($expected, array_keys($source_plugins));
        // Next, install the file module, which has 4 migrate source plugins, all of
        // which depend on migrate_drupal. Since migrate_drupal is not installed,
        // none of the source plugins from file should be discovered. However, the
        // content_entity source for the file entity type should be discovered.
        $expected = [
            'content_entity:file',
            'embedded_data',
            'empty',
        ];
        $this->enableModules([
            'file',
        ]);
        $source_plugins = \Drupal::service('plugin.manager.migrate.source')->getDefinitions();
        ksort($source_plugins);
        $this->assertSame($expected, array_keys($source_plugins));
        // Install migrate_drupal and now the source plugins from the file modules
        // should be found.
        $expected = [
            'd6_file',
            'd6_upload',
            'd6_upload_instance',
            'd7_file',
            'embedded_data',
            'empty',
        ];
        $this->enableModules([
            'migrate_drupal',
        ]);
        $source_plugins = \Drupal::service('plugin.manager.migrate.source')->getDefinitions();
        $this->assertSame(array_diff($expected, array_keys($source_plugins)), []);
    }
    
    /**
     * @covers \Drupal\migrate\Plugin\MigrateSourcePluginManager::getDefinitions
     */
    public function testAnnotationGetDefinitionsBackwardsCompatibility() : void {
        // First, test attribute-only discovery.
        $expected = [
            'embedded_data',
            'empty',
        ];
        $source_plugins = \Drupal::service('plugin.manager.migrate.source')->getDefinitions();
        ksort($source_plugins);
        $this->assertSame($expected, array_keys($source_plugins));
        // Next, test discovery of both attributed and annotated plugins. The
        // annotated plugin with multiple providers depends on migrate_drupal and
        // should not be discovered with it uninstalled.
        $expected = [
            'annotated',
            'embedded_data',
            'empty',
        ];
        $this->enableModules([
            'migrate_source_annotation_bc_test',
        ]);
        $source_plugins = \Drupal::service('plugin.manager.migrate.source')->getDefinitions();
        ksort($source_plugins);
        $this->assertSame($expected, array_keys($source_plugins));
        // Install migrate_drupal and now the annotated plugin that depends on it
        // should be discovered.
        $expected = [
            'annotated',
            'annotated_multiple_providers',
            'embedded_data',
            'empty',
        ];
        $this->enableModules([
            'migrate_drupal',
        ]);
        $source_plugins = \Drupal::service('plugin.manager.migrate.source')->getDefinitions();
        // Confirming here the that the source plugins that migrate and
        // migrate_source_annotation_bc_test are discovered. There are additional
        // plugins provided by migrate_drupal, but they do not need to be enumerated
        // here.
        $this->assertSame(array_diff($expected, array_keys($source_plugins)), []);
    }

}