function ModuleImplementsAlterTest::testModuleImplementsAlter

Tests hook_module_implements_alter() adding an implementation.

See also

\Drupal\Core\Extension\ModuleHandler::buildImplementationInfo()

module_implements_alter_test_module_implements_alter()

File

core/tests/Drupal/KernelTests/Core/Extension/ModuleImplementsAlterTest.php, line 29

Class

ModuleImplementsAlterTest

Tests hook_module_implements_alter().

Namespace

Code

public function testModuleImplementsAlter() : void {
  // Get an instance of the module handler, to observe how it is going to be
  // replaced.
  $module_handler = \Drupal::moduleHandler();
  $this->assertSame(\Drupal::moduleHandler(), $module_handler, 'Module handler instance is still the same.');
  // Install the module_implements_alter_test module.
  \Drupal::service('module_installer')->install([
    'module_implements_alter_test',
  ]);
  // Assert that the \Drupal::moduleHandler() instance has been replaced.
  $this->assertNotSame(\Drupal::moduleHandler(), $module_handler, 'The \\Drupal::moduleHandler() instance has been replaced during \\Drupal::moduleHandler()->install().');
  // Assert that module_implements_alter_test.module is now included.
  $this->assertTrue(function_exists('test_auto_include'), 'The file module_implements_alter_test.module was successfully included.');
  $this->assertTrue(\Drupal::moduleHandler()->hasImplementations('module_implements_alter', 'module_implements_alter_test'), 'module_implements_alter_test implements hook_module_implements_alter().');
  // Assert that module_implements_alter_test.implementations.inc is not included yet.
  $this->assertFalse(function_exists('module_implements_alter_test_altered_test_hook'), 'The file module_implements_alter_test.implementations.inc is not included yet.');
  // Trigger hook discovery for hook_altered_test_hook().
  // Assert that module_implements_alter_test_module_implements_alter(*, 'altered_test_hook')
  // has added an implementation.
  $this->assertTrue(\Drupal::moduleHandler()->hasImplementations('altered_test_hook', 'module_implements_alter_test'), 'module_implements_alter_test implements hook_altered_test_hook().');
  // Assert that module_implements_alter_test.implementations.inc was included as part of the process.
  $this->assertTrue(function_exists('module_implements_alter_test_altered_test_hook'), 'The file module_implements_alter_test.implementations.inc was included.');
}