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[yaffs-website] / web / core / modules / system / tests / src / Functional / Update / DependencyOrderingTest.php

diff --git a/web/core/modules/system/tests/src/Functional/Update/DependencyOrderingTest.php b/web/core/modules/system/tests/src/Functional/Update/DependencyOrderingTest.php
new file mode 100644 (file)
index 0000000..8cafaad
--- /dev/null
+++ b/web/core/modules/system/tests/src/Functional/Update/DependencyOrderingTest.php
@@ -0,0 +1,58 @@
+<?php
+
+namespace Drupal\Tests\system\Functional\Update;
+
+use Drupal\Tests\BrowserTestBase;
+
+/**
+ * Tests that update functions are run in the proper order.
+ *
+ * @group Update
+ */
+class DependencyOrderingTest extends BrowserTestBase {
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = ['update_test_0', 'update_test_1', 'update_test_2', 'update_test_3'];
+
+  protected function setUp() {
+    parent::setUp();
+    require_once \Drupal::root() . '/core/includes/update.inc';
+  }
+
+  /**
+   * Test that updates within a single module run in the correct order.
+   */
+  public function testUpdateOrderingSingleModule() {
+    $starting_updates = [
+      'update_test_1' => 8001,
+    ];
+    $expected_updates = [
+      'update_test_1_update_8001',
+      'update_test_1_update_8002',
+      'update_test_1_update_8003',
+    ];
+    $actual_updates = array_keys(update_resolve_dependencies($starting_updates));
+    $this->assertEqual($expected_updates, $actual_updates, 'Updates within a single module run in the correct order.');
+  }
+
+  /**
+   * Test that dependencies between modules are resolved correctly.
+   */
+  public function testUpdateOrderingModuleInterdependency() {
+    $starting_updates = [
+      'update_test_2' => 8001,
+      'update_test_3' => 8001,
+    ];
+    $update_order = array_keys(update_resolve_dependencies($starting_updates));
+    // Make sure that each dependency is satisfied.
+    $first_dependency_satisfied = array_search('update_test_2_update_8001', $update_order) < array_search('update_test_3_update_8001', $update_order);
+    $this->assertTrue($first_dependency_satisfied, 'The dependency of the second module on the first module is respected by the update function order.');
+    $second_dependency_satisfied = array_search('update_test_3_update_8001', $update_order) < array_search('update_test_2_update_8002', $update_order);
+    $this->assertTrue($second_dependency_satisfied, 'The dependency of the first module on the second module is respected by the update function order.');
+  }
+
+}