class MigrationTest

class MigrationTest extends KernelTestBase {
    
    /**
     * Enable field because we are using one of its source plugins.
     *
     * @var array
     */
    protected static $modules = [
        'migrate',
        'field',
    ];
    
    /**
     * Tests Migration::set().
     *
     * @covers ::set
     */
    public function testSetInvalidation() {
        $migration = \Drupal::service('plugin.manager.migration')->createStubMigration([
            'source' => [
                'plugin' => 'empty',
            ],
            'destination' => [
                'plugin' => 'entity:entity_view_mode',
            ],
        ]);
        $this->assertEquals('empty', $migration->getSourcePlugin()
            ->getPluginId());
        $this->assertEquals('entity:entity_view_mode', $migration->getDestinationPlugin()
            ->getPluginId());
        // Test the source plugin is invalidated.
        $migration->set('source', [
            'plugin' => 'embedded_data',
            'data_rows' => [],
            'ids' => [],
        ]);
        $this->assertEquals('embedded_data', $migration->getSourcePlugin()
            ->getPluginId());
        // Test the destination plugin is invalidated.
        $migration->set('destination', [
            'plugin' => 'null',
        ]);
        $this->assertEquals('null', $migration->getDestinationPlugin()
            ->getPluginId());
    }

}