class MultilingualReviewPageTestBase

abstract class MultilingualReviewPageTestBase extends MigrateUpgradeTestBase {
    use CreateTestContentEntitiesTrait;
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'migrate_drupal_ui',
    ];
    
    /**
     * Tests the migrate upgrade review form.
     *
     * The upgrade review form displays a list of modules that will be upgraded
     * and a list of modules that will not be upgraded. This test is to ensure
     * that the review page works correctly for all contributed Drupal 6 and
     * Drupal 7 modules that have moved to core, e.g. Views, and for modules that
     * were in Drupal 6 or Drupal 7 core but are not in Drupal 8 core, e.g.
     * Overlay.
     *
     * To do this all modules in the source fixtures are enabled, except test and
     * example modules. This means that we can test that the modules that do not
     * need any migrations, such as Overlay, since there will be no available
     * migrations which declare those modules as their source_module. It is
     * assumed that the test fixtures include all modules that have moved to or
     * dropped from core.
     *
     * The upgrade review form will also display errors for each migration that
     * does not have a source_module definition. That function is not tested here.
     *
     * @see \Drupal\Tests\migrate_drupal_ui\Functional\MigrateUpgradeExecuteTestBase
     */
    public function testMigrateUpgradeReviewPage() : void {
        $this->prepare();
        // Start the upgrade process.
        $this->submitCredentialForm();
        $this->submitForm([], 'I acknowledge I may lose data. Continue anyway.');
        // Test the upgrade paths.
        $this->assertReviewForm();
        // Check there are no errors when a module does not have any migrations and
        // does not need any. Test with a module that is in both Drupal 6 and
        // Drupal 7 core.
        $module = 'help';
        $module_name = 'Help';
        $query = $this->sourceDatabase
            ->delete('system');
        $query->condition('type', 'module');
        $query->condition('name', $module);
        $query->execute();
        // Start the upgrade process.
        $this->drupalGet('/upgrade');
        $this->submitForm([], 'Continue');
        $this->submitForm($this->edits, 'Review upgrade');
        $this->submitForm([], 'I acknowledge I may lose data. Continue anyway.');
        // Test the upgrade paths. First remove the module from the available paths
        // list.
        $available_paths = $this->getAvailablePaths();
        $available_paths = array_diff($available_paths, [
            $module_name,
        ]);
        $this->assertReviewForm($available_paths);
    }
    
    /**
     * Performs preparation for the form tests.
     *
     * This is not done in setup because setup executes before the source database
     * is loaded.
     */
    public function prepare() {
        // Enable all modules in the source except test and example modules, but
        // include simpletest.
        
        /** @var \Drupal\Core\Database\Query\SelectInterface $update */
        $update = $this->sourceDatabase
            ->update('system')
            ->fields([
            'status' => 1,
        ])
            ->condition('type', 'module');
        $and = $update->andConditionGroup()
            ->condition('name', '%test%', 'NOT LIKE')
            ->condition('name', '%example%', 'NOT LIKE');
        $conditions = $update->orConditionGroup();
        $conditions->condition($and);
        $conditions->condition('name', 'simpletest');
        $update->condition($conditions);
        $update->execute();
        // Create entries for D8 test modules.
        $insert = $this->sourceDatabase
            ->insert('system')
            ->fields([
            'filename' => 'migrate_status_active_test',
            'name' => 'migrate_status_active_test',
            'type' => 'module',
            'status' => 1,
        ]);
        $insert->execute();
    }
    
    /**
     * {@inheritdoc}
     */
    protected function getEntityCounts() {
        return [];
    }
    
    /**
     * {@inheritdoc}
     */
    protected function getEntityCountsIncremental() {
        return [];
    }

}