/core/modules/system/tests/src/Functional/System/SystemAuthorizeTest.php

<?php

namespace Drupal\Tests\system\Functional\System;

use Drupal\Tests\BrowserTestBase;

/**
 * Tests the authorize.php script and related API.
 *
 * @group system
 */
class SystemAuthorizeTest extends BrowserTestBase {

  /**
   * Modules to enable.
   *
   * @var array
   */
  public static $modules = ['system_test'];

  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'stark';

  protected function setUp() {
    parent::setUp();

    // Create an administrator user.
    $this->drupalLogin($this->drupalCreateUser(['administer software updates']));
  }

  /**
   * Helper function to initialize authorize.php and load it via drupalGet().
   *
   * Initializing authorize.php needs to happen in the child Drupal
   * installation, not the parent. So, we visit a menu callback provided by
   * system_test.module which calls system_authorized_init() to initialize the
   * $_SESSION inside the test site, not the framework site. This callback
   * redirects to authorize.php when it's done initializing.
   *
   * @see system_authorized_init()
   */
  public function drupalGetAuthorizePHP($page_title = 'system-test-auth') {
    $this->drupalGet('system-test/authorize-init/' . $page_title);
  }

  /**
   * Tests the FileTransfer hooks
   */
  public function testFileTransferHooks() {
    $page_title = $this->randomMachineName(16);
    $this->drupalGetAuthorizePHP($page_title);
    $this->assertTitle(strtr('@title | Drupal', ['@title' => $page_title]), 'authorize.php page title is correct.');
    $this->assertNoText('It appears you have reached this page in error.');
    $this->assertText('To continue, provide your server connection details');
    // Make sure we see the new connection method added by system_test.
    $this->assertRaw('System Test FileTransfer');
    // Make sure the settings form callback works.
    $this->assertText('System Test Username');
    // Test that \Drupal\Core\Render\BareHtmlPageRenderer adds assets as
    // expected to the first page of the authorize.php script.
    $this->assertRaw('core/misc/states.js');
  }

}