--- /dev/null
+<?php
+
+namespace Drupal\Tests\migrate_drupal\Kernel\dependencies;
+
+use Drupal\Component\Utility\SafeMarkup;
+use Drupal\migrate\MigrateExecutable;
+use Drupal\Tests\migrate_drupal\Kernel\d6\MigrateDrupal6TestBase;
+
+/**
+ * Ensure the consistency among the dependencies for migrate.
+ *
+ * @group migrate_drupal
+ */
+class MigrateDependenciesTest extends MigrateDrupal6TestBase {
+
+ /**
+ * {@inheritdoc}
+ */
+ public static $modules = ['aggregator', 'comment'];
+
+ /**
+ * Tests that the order is correct when loading several migrations.
+ */
+ public function testMigrateDependenciesOrder() {
+ $migration_items = ['d6_comment', 'd6_filter_format', 'd6_node:page'];
+ $migrations = $this->container->get('plugin.manager.migration')->createInstances($migration_items);
+ $expected_order = ['d6_filter_format', 'd6_node:page', 'd6_comment'];
+ $this->assertIdentical(array_keys($migrations), $expected_order);
+ $expected_requirements = [
+ // d6_comment depends on d6_node:*, which the deriver expands into every
+ // variant of d6_node.
+ 'd6_node:article',
+ 'd6_node:company',
+ 'd6_node:employee',
+ 'd6_node:event',
+ 'd6_node:forum',
+ 'd6_node:page',
+ 'd6_user',
+ 'd6_node_type',
+ 'd6_node_settings',
+ 'd6_filter_format',
+ 'd6_node:sponsor',
+ 'd6_node:story',
+ 'd6_node:test_event',
+ 'd6_node:test_page',
+ 'd6_node:test_planet',
+ 'd6_node:test_story',
+ 'd6_comment_type',
+ 'd6_comment_entity_display',
+ 'd6_comment_entity_form_display',
+ ];
+ // Migration dependencies for comment include dependencies for node
+ // migration as well.
+ $actual_requirements = $migrations['d6_comment']->get('requirements');
+ $this->assertIdentical(count($actual_requirements), count($expected_requirements));
+ foreach ($expected_requirements as $requirement) {
+ $this->assertIdentical($actual_requirements[$requirement], $requirement);
+ }
+ }
+
+ /**
+ * Tests dependencies on the migration of aggregator feeds & items.
+ */
+ public function testAggregatorMigrateDependencies() {
+ /** @var \Drupal\migrate\Plugin\Migration $migration */
+ $migration = $this->getMigration('d6_aggregator_item');
+ $executable = new MigrateExecutable($migration, $this);
+ $this->startCollectingMessages();
+ $executable->import();
+ $this->assertEqual($this->migrateMessages['error'], [SafeMarkup::format('Migration @id did not meet the requirements. Missing migrations d6_aggregator_feed. requirements: d6_aggregator_feed.', ['@id' => $migration->id()])]);
+ $this->collectMessages = FALSE;
+ }
+
+}