+ $comment_fields = [
+ 'comment' => 'Default comment setting',
+ 'comment_default_mode' => 'Default display mode',
+ 'comment_default_per_page' => 'Default comments per page',
+ 'comment_anonymous' => 'Anonymous commenting',
+ 'comment_subject_field' => 'Comment subject field',
+ 'comment_preview' => 'Preview comment',
+ 'comment_form_location' => 'Location of comment submission form',
+ ];
+ $this->assertArraySubset($comment_fields, $this->migration->getSourcePlugin()->fields());
+