--- /dev/null
+<?php
+
+namespace Drupal\Tests\comment\Kernel\Plugin\migrate\source\d6;
+
+use Drupal\Tests\migrate\Kernel\MigrateSqlSourceTestBase;
+
+/**
+ * Tests D6 comment source plugin.
+ *
+ * @covers \Drupal\comment\Plugin\migrate\source\d6\Comment
+ * @group comment
+ */
+class CommentTest extends MigrateSqlSourceTestBase {
+
+ /**
+ * {@inheritdoc}
+ */
+ public static $modules = ['comment', 'migrate_drupal'];
+
+ /**
+ * {@inheritdoc}
+ */
+ public function providerSource() {
+ $tests = [];
+
+ // The source data.
+ $tests[0]['source_data']['comments'] = [
+ [
+ 'cid' => 1,
+ 'pid' => 0,
+ 'nid' => 2,
+ 'uid' => 3,
+ 'subject' => 'subject value 1',
+ 'comment' => 'comment value 1',
+ 'hostname' => 'hostname value 1',
+ 'timestamp' => 1382255613,
+ 'status' => 0,
+ 'thread' => '',
+ 'name' => '',
+ 'mail' => '',
+ 'homepage' => '',
+ 'format' => 'testformat1',
+ 'type' => 'story',
+ ],
+ [
+ 'cid' => 2,
+ 'pid' => 1,
+ 'nid' => 3,
+ 'uid' => 4,
+ 'subject' => 'subject value 2',
+ 'comment' => 'comment value 2',
+ 'hostname' => 'hostname value 2',
+ 'timestamp' => 1382255662,
+ 'status' => 0,
+ 'thread' => '',
+ 'name' => '',
+ 'mail' => '',
+ 'homepage' => '',
+ 'format' => 'testformat2',
+ 'type' => 'page',
+ ],
+ ];
+
+ $tests[0]['source_data']['node'] = [
+ [
+ 'nid' => 2,
+ 'type' => 'story',
+ ],
+ [
+ 'nid' => 3,
+ 'type' => 'page',
+ ],
+ ];
+
+ // The expected results.
+ $tests[0]['expected_data'] = [
+ [
+ 'cid' => 1,
+ 'pid' => 0,
+ 'nid' => 2,
+ 'uid' => 3,
+ 'subject' => 'subject value 1',
+ 'comment' => 'comment value 1',
+ 'hostname' => 'hostname value 1',
+ 'timestamp' => 1382255613,
+ 'status' => 1,
+ 'thread' => '',
+ 'name' => '',
+ 'mail' => '',
+ 'homepage' => '',
+ 'format' => 'testformat1',
+ 'type' => 'story',
+ ],
+ [
+ 'cid' => 2,
+ 'pid' => 1,
+ 'nid' => 3,
+ 'uid' => 4,
+ 'subject' => 'subject value 2',
+ 'comment' => 'comment value 2',
+ 'hostname' => 'hostname value 2',
+ 'timestamp' => 1382255662,
+ 'status' => 1,
+ 'thread' => '',
+ 'name' => '',
+ 'mail' => '',
+ 'homepage' => '',
+ 'format' => 'testformat2',
+ 'type' => 'page',
+ ],
+ ];
+
+ return $tests;
+ }
+
+}