--- /dev/null
+<?php
+
+namespace Drupal\Tests\comment\Kernel\Plugin\migrate\source\d6;
+
+use Drupal\Tests\migrate\Kernel\MigrateSqlSourceTestBase;
+
+/**
+ * Tests d6_comment_variable source plugin.
+ *
+ * @covers \Drupal\comment\Plugin\migrate\source\d6\CommentVariable
+ * @group comment
+ */
+class CommentVariableTest extends MigrateSqlSourceTestBase {
+
+ /**
+ * {@inheritdoc}
+ */
+ public static $modules = ['comment', 'migrate_drupal'];
+
+ /**
+ * {@inheritdoc}
+ */
+ public function providerSource() {
+ $tests = [];
+
+ // The source data.
+ $tests[0]['source_data']['node_type'] = [
+ [
+ 'type' => 'page',
+ ],
+ ];
+
+ $tests[0]['source_data']['variable'] = [
+ [
+ 'name' => 'comment_page',
+ 'value' => serialize(1),
+ ],
+ [
+ 'name' => 'comment_default_mode_page',
+ 'value' => serialize(1),
+ ],
+ [
+ 'name' => 'comment_default_order_page',
+ 'value' => serialize(1),
+ ],
+ [
+ 'name' => 'comment_default_per_page_page',
+ 'value' => serialize(50),
+ ],
+ [
+ 'name' => 'comment_controls_page',
+ 'value' => serialize(1),
+ ],
+ [
+ 'name' => 'comment_anonymous_page',
+ 'value' => serialize(1),
+ ],
+ [
+ 'name' => 'comment_subject_field_page',
+ 'value' => serialize(1),
+ ],
+ [
+ 'name' => 'comment_preview_page',
+ 'value' => serialize(1),
+ ],
+ [
+ 'name' => 'comment_form_location_page',
+ 'value' => serialize(1),
+ ],
+ ];
+
+ // The expected results.
+ $tests[0]['expected_data'] = [
+ [
+ 'comment' => '1',
+ 'comment_default_mode' => '1',
+ 'comment_default_order' => '1',
+ 'comment_default_per_page' => '50',
+ 'comment_controls' => '1',
+ 'comment_anonymous' => '1',
+ 'comment_subject_field' => '1',
+ 'comment_preview' => '1',
+ 'comment_form_location' => '1',
+ 'node_type' => 'page',
+ 'comment_type' => 'comment',
+ ],
+ ];
+
+ return $tests;
+ }
+
+}