first commit

core/tests/Drupal/KernelTests/KernelTestBaseShutdownTest.php

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+<?php
+
+declare(strict_types=1);
+
+namespace Drupal\KernelTests;
+
+/**
+ * @coversDefaultClass \Drupal\KernelTests\KernelTestBase
+ *
+ * @group PHPUnit
+ * @group Test
+ * @group KernelTests
+ */
+class KernelTestBaseShutdownTest extends KernelTestBase {
+
+  /**
+   * Indicates which shutdown functions are expected to be called.
+   *
+   * @var array
+   */
+  protected $expectedShutdownCalled;
+
+  /**
+   * Indicates which shutdown functions have been called.
+   *
+   * @var array
+   */
+  protected static $shutdownCalled;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp(): void {
+    // Initialize static variable prior to testing.
+    self::$shutdownCalled = [];
+    parent::setUp();
+  }
+
+  /**
+   * @covers ::assertPostConditions
+   */
+  public function testShutdownFunction(): void {
+    $this->expectedShutdownCalled = ['shutdownFunction', 'shutdownFunction2'];
+    drupal_register_shutdown_function([$this, 'shutdownFunction']);
+  }
+
+  /**
+   * @covers ::assertPostConditions
+   */
+  public function testNoShutdownFunction(): void {
+    $this->expectedShutdownCalled = [];
+  }
+
+  /**
+   * Registers that this shutdown function has been called.
+   */
+  public function shutdownFunction() {
+    self::$shutdownCalled[] = 'shutdownFunction';
+    drupal_register_shutdown_function([$this, 'shutdownFunction2']);
+  }
+
+  /**
+   * Registers that this shutdown function has been called.
+   */
+  public function shutdownFunction2() {
+    self::$shutdownCalled[] = 'shutdownFunction2';
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function assertPostConditions(): void {
+    parent::assertPostConditions();
+    $this->assertSame($this->expectedShutdownCalled, self::$shutdownCalled);
+  }
+
+}