class MigrationPluginConfigurationTest

class MigrationPluginConfigurationTest extends KernelTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'migrate',
        'migrate_drupal',
        // Test with a simple migration.
'ban',
        'locale',
    ];
    
    /**
     * Tests merging configuration into a plugin through the plugin manager.
     *
     * @dataProvider mergeProvider
     */
    public function testConfigurationMerge($id, $configuration, $expected) : void {
        
        /** @var \Drupal\migrate\Plugin\MigrationInterface $migration */
        $migration = $this->container
            ->get('plugin.manager.migration')
            ->createInstance($id, $configuration);
        $source_configuration = $migration->getSourceConfiguration();
        $this->assertEquals($expected, $source_configuration);
    }
    
    /**
     * Provide configuration data for testing.
     */
    public static function mergeProvider() {
        return [
            // Tests adding new configuration to a migration.
[
                // New configuration.
'd7_blocked_ips',
                [
                    'source' => [
                        'constants' => [
                            'added_setting' => 'Ban them all!',
                        ],
                    ],
                ],
                // Expected final source configuration.
[
                    'plugin' => 'd7_blocked_ips',
                    'constants' => [
                        'added_setting' => 'Ban them all!',
                    ],
                ],
            ],
            // Tests overriding pre-existing configuration in a migration.
[
                // New configuration.
'd7_blocked_ips',
                [
                    'source' => [
                        'plugin' => 'a_different_plugin',
                    ],
                ],
                // Expected final source configuration.
[
                    'plugin' => 'a_different_plugin',
                ],
            ],
            // New configuration.
[
                'locale_settings',
                [
                    'source' => [
                        'plugin' => 'variable',
                        'variables' => [
                            'locale_cache_strings',
                            'locale_js_directory',
                        ],
                        'source_module' => 'locale',
                    ],
                ],
                // Expected final source and process configuration.
[
                    'plugin' => 'variable',
                    'variables' => [
                        'locale_cache_strings',
                        'locale_js_directory',
                    ],
                    'source_module' => 'locale',
                ],
            ],
        ];
    }

}