public function DrupalKernelTest::testInitializeSettings in Drupal 8

Tests the reregistration of autoloaders if APCu available.

This test runs in a separate process since it registers class loaders and results in statics being set.

@runInSeparateProcess @preserveGlobalState disabled @requires function apcu_fetch @covers ::initializeSettings

File

core/tests/Drupal/Tests/Core/DrupalKernel/DrupalKernelTest.php, line 62

Class

DrupalKernelTest

@coversDefaultClass \Drupal\Core\DrupalKernel @group DrupalKernel

Namespace

Drupal\Tests\Core\DrupalKernel

Code

public function testInitializeSettings() {
  $request = new Request();
  $classloader = new fakeAutoloader();

  // Create a kernel suitable for testing.
  $kernel = $this
    ->getMockBuilder(DrupalKernel::class)
    ->disableOriginalConstructor()
    ->setMethods([
    'do_not_mock_any_methods',
  ])
    ->getMock();
  $classloader_property = new \ReflectionProperty($kernel, 'classLoader');
  $classloader_property
    ->setAccessible(TRUE);
  $classloader_property
    ->setValue($kernel, $classloader);
  $method = new \ReflectionMethod($kernel, 'initializeSettings');
  $method
    ->setAccessible(TRUE);

  // Prepend another autoloader to simulate Drush's autoloader.
  $fake_drush_autoloader = function () {
    return NULL;
  };
  spl_autoload_register($fake_drush_autoloader, TRUE, TRUE);

  // Before calling DrupalKernel::initializeSettings() the first autoloader
  // is the fake Drush autoloader.
  $this
    ->assertSame($fake_drush_autoloader, spl_autoload_functions()[0]);

  // Call DrupalKernel::initializeSettings() to simulate part of a Drupal
  // bootstrap. During the include of autoload.php Composer would prepend
  // Drupal's autoloader and then this method should not result in Drush's
  // autoloader becoming the first autoloader even if it swaps out
  // Composer's autoloader for an optimised one.
  $method
    ->invoke($kernel, $request);
  $autoloaders = spl_autoload_functions();

  // The first autoloader should be the APCu based autoloader.
  $this
    ->assertInstanceOf(ApcClassLoader::class, $autoloaders[0][0]);

  // The second autoloader should be the original autoloader the kernel was
  // constructed with.
  $this
    ->assertSame($classloader, $autoloaders[1][0]);

  // The third autoloader should be Drush's autoloader.
  $this
    ->assertSame($fake_drush_autoloader, $autoloaders[2]);

  // Reset the request factory because it is statically stored on the
  // request.
  Request::setFactory(NULL);
}