comparison core/tests/Drupal/Tests/Component/DependencyInjection/ContainerTest.php @ 0:c75dbcec494b

Initial commit from drush-created site

+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Tests\Component\DependencyInjection\ContainerTest.
+ */
+
+namespace Drupal\Tests\Component\DependencyInjection;
+
+use Drupal\Component\Utility\Crypt;
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
+use Symfony\Component\DependencyInjection\Exception\LogicException;
+use Symfony\Component\DependencyInjection\Exception\ParameterNotFoundException;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+use Symfony\Component\DependencyInjection\Exception\ServiceCircularReferenceException;
+use Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException;
+use Prophecy\Argument;
+
+/**
+ * @coversDefaultClass \Drupal\Component\DependencyInjection\Container
+ * @group DependencyInjection
+ */
+class ContainerTest extends TestCase {
+
+  /**
+   * The tested container.
+   *
+   * @var \Symfony\Component\DependencyInjection\ContainerInterface
+   */
+  protected $container;
+
+  /**
+   * The container definition used for the test.
+   *
+   * @var array
+   */
+  protected $containerDefinition;
+
+  /**
+   * The container class to be tested.
+   *
+   * @var bool
+   */
+  protected $containerClass;
+
+  /**
+   * Whether the container uses the machine-optimized format or not.
+   *
+   * @var bool
+   */
+  protected $machineFormat;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    $this->machineFormat = TRUE;
+    $this->containerClass = '\Drupal\Component\DependencyInjection\Container';
+    $this->containerDefinition = $this->getMockContainerDefinition();
+    $this->container = new $this->containerClass($this->containerDefinition);
+  }
+
+  /**
+   * Tests that passing a non-supported format throws an InvalidArgumentException.
+   *
+   * @covers ::__construct
+   */
+  public function testConstruct() {
+    $container_definition = $this->getMockContainerDefinition();
+    $container_definition['machine_format'] = !$this->machineFormat;
+    if (method_exists($this, 'expectException')) {
+      $this->expectException(InvalidArgumentException::class);
+    }
+    else {
+      $this->setExpectedException(InvalidArgumentException::class);
+    }
+    $container = new $this->containerClass($container_definition);
+  }
+
+  /**
+   * Tests that Container::getParameter() works properly.
+   *
+   * @covers ::getParameter
+   */
+  public function testGetParameter() {
+    $this->assertEquals($this->containerDefinition['parameters']['some_config'], $this->container->getParameter('some_config'), 'Container parameter matches for %some_config%.');
+    $this->assertEquals($this->containerDefinition['parameters']['some_other_config'], $this->container->getParameter('some_other_config'), 'Container parameter matches for %some_other_config%.');
+  }
+
+  /**
+   * Tests that Container::getParameter() works properly for non-existing
+   * parameters.
+   *
+   * @covers ::getParameter
+   * @covers ::getParameterAlternatives
+   * @covers ::getAlternatives
+   */
+  public function testGetParameterIfNotFound() {
+    if (method_exists($this, 'expectException')) {
+      $this->expectException(ParameterNotFoundException::class);
+    }
+    else {
+      $this->setExpectedException(ParameterNotFoundException::class);
+    }
+    $this->container->getParameter('parameter_that_does_not_exist');
+  }
+
+  /**
+   * Tests that Container::getParameter() works properly for NULL parameters.
+   *
+   * @covers ::getParameter
+   */
+  public function testGetParameterIfNotFoundBecauseNull() {
+    if (method_exists($this, 'expectException')) {
+      $this->expectException(ParameterNotFoundException::class);
+    }
+    else {
+      $this->setExpectedException(ParameterNotFoundException::class);
+    }
+    $this->container->getParameter(NULL);
+  }
+
+  /**
+   * Tests that Container::hasParameter() works properly.
+   *
+   * @covers ::hasParameter
+   */
+  public function testHasParameter() {
+    $this->assertTrue($this->container->hasParameter('some_config'), 'Container parameters include %some_config%.');
+    $this->assertFalse($this->container->hasParameter('some_config_not_exists'), 'Container parameters do not include %some_config_not_exists%.');
+  }
+
+  /**
+   * Tests that Container::setParameter() in an unfrozen case works properly.
+   *
+   * @covers ::setParameter
+   */
+  public function testSetParameterWithUnfrozenContainer() {
+    $container_definition = $this->containerDefinition;
+    $container_definition['frozen'] = FALSE;
+    $this->container = new $this->containerClass($container_definition);
+    $this->container->setParameter('some_config', 'new_value');
+    $this->assertEquals('new_value', $this->container->getParameter('some_config'), 'Container parameters can be set.');
+  }
+
+  /**
+   * Tests that Container::setParameter() in a frozen case works properly.
+   *
+   * @covers ::setParameter
+   */
+  public function testSetParameterWithFrozenContainer() {
+    $this->container = new $this->containerClass($this->containerDefinition);
+    if (method_exists($this, 'expectException')) {
+      $this->expectException(LogicException::class);
+    }
+    else {
+      $this->setExpectedException(LogicException::class);
+    }
+    $this->container->setParameter('some_config', 'new_value');
+  }
+
+  /**
+   * Tests that Container::get() works properly.
+   *
+   * @covers ::get
+   * @covers ::createService
+   */
+  public function testGet() {
+    $container = $this->container->get('service_container');
+    $this->assertSame($this->container, $container, 'Container can be retrieved from itself.');
+
+    // Retrieve services of the container.
+    $other_service_class = $this->containerDefinition['services']['other.service']['class'];
+    $other_service = $this->container->get('other.service');
+    $this->assertInstanceOf($other_service_class, $other_service, 'other.service has the right class.');
+
+    $some_parameter = $this->containerDefinition['parameters']['some_config'];
+    $some_other_parameter = $this->containerDefinition['parameters']['some_other_config'];
+
+    $service = $this->container->get('service.provider');
+
+    $this->assertEquals($other_service, $service->getSomeOtherService(), '@other.service was injected via constructor.');
+    $this->assertEquals($some_parameter, $service->getSomeParameter(), '%some_config% was injected via constructor.');
+    $this->assertEquals($this->container, $service->getContainer(), 'Container was injected via setter injection.');
+    $this->assertEquals($some_other_parameter, $service->getSomeOtherParameter(), '%some_other_config% was injected via setter injection.');
+    $this->assertEquals($service->_someProperty, 'foo', 'Service has added properties.');
+  }
+
+  /**
+   * Tests that Container::get() for non-shared services works properly.
+   *
+   * @covers ::get
+   * @covers ::createService
+   */
+  public function testGetForNonSharedService() {
+    $service = $this->container->get('non_shared_service');
+    $service2 = $this->container->get('non_shared_service');
+
+    $this->assertNotSame($service, $service2, 'Non shared services are always re-instantiated.');
+  }
+
+  /**
+   * Tests that Container::get() works properly for class from parameters.
+   *
+   * @covers ::get
+   * @covers ::createService
+   */
+  public function testGetForClassFromParameter() {
+    $container_definition = $this->containerDefinition;
+    $container_definition['frozen'] = FALSE;
+    $container = new $this->containerClass($container_definition);
+
+    $other_service_class = $this->containerDefinition['parameters']['some_parameter_class'];
+    $other_service = $container->get('other.service_class_from_parameter');
+    $this->assertInstanceOf($other_service_class, $other_service, 'other.service_class_from_parameter has the right class.');
+  }
+
+  /**
+   * Tests that Container::set() works properly.
+   *
+   * @covers ::set
+   */
+  public function testSet() {
+    $this->assertNull($this->container->get('new_id', ContainerInterface::NULL_ON_INVALID_REFERENCE));
+    $mock_service = new MockService();
+    $this->container->set('new_id', $mock_service);
+
+    $this->assertSame($mock_service, $this->container->get('new_id'), 'A manual set service works as expected.');
+  }
+
+  /**
+   * Tests that Container::has() works properly.
+   *
+   * @covers ::has
+   */
+  public function testHas() {
+    $this->assertTrue($this->container->has('other.service'));
+    $this->assertFalse($this->container->has('another.service'));
+
+    // Set the service manually, ensure that its also respected.
+    $mock_service = new MockService();
+    $this->container->set('another.service', $mock_service);
+    $this->assertTrue($this->container->has('another.service'));
+  }
+
+  /**
+   * Tests that Container::has() for aliased services works properly.
+   *
+   * @covers ::has
+   */
+  public function testHasForAliasedService() {
+    $service = $this->container->has('service.provider');
+    $aliased_service = $this->container->has('service.provider_alias');
+    $this->assertSame($service, $aliased_service);
+  }
+
+  /**
+   * Tests that Container::get() for circular dependencies works properly.
+   * @covers ::get
+   * @covers ::createService
+   */
+  public function testGetForCircularServices() {
+    if (method_exists($this, 'expectException')) {
+      $this->expectException(ServiceCircularReferenceException::class);
+    }
+    else {
+      $this->setExpectedException(ServiceCircularReferenceException::class);
+    }
+    $this->container->get('circular_dependency');
+  }
+
+  /**
+   * Tests that Container::get() for non-existent services works properly.
+   *
+   * @covers ::get
+   * @covers ::createService
+   * @covers ::getAlternatives
+   * @covers ::getServiceAlternatives
+   */
+  public function testGetForNonExistantService() {
+    if (method_exists($this, 'expectException')) {
+      $this->expectException(ServiceNotFoundException::class);
+    }
+    else {
+      $this->setExpectedException(ServiceNotFoundException::class);
+    }
+    $this->container->get('service_not_exists');
+  }
+
+  /**
+   * Tests that Container::get() for a serialized definition works properly.
+   *
+   * @covers ::get
+   * @covers ::createService
+   */
+  public function testGetForSerializedServiceDefinition() {
+    $container_definition = $this->containerDefinition;
+    $container_definition['services']['other.service'] = serialize($container_definition['services']['other.service']);
+    $container = new $this->containerClass($container_definition);
+
+    // Retrieve services of the container.
+    $other_service_class = $this->containerDefinition['services']['other.service']['class'];
+    $other_service = $container->get('other.service');
+    $this->assertInstanceOf($other_service_class, $other_service, 'other.service has the right class.');
+
+    $service = $container->get('service.provider');
+    $this->assertEquals($other_service, $service->getSomeOtherService(), '@other.service was injected via constructor.');
+  }
+
+  /**
+   * Tests that Container::get() for non-existent parameters works properly.
+   *
+   * @covers ::get
+   * @covers ::createService
+   * @covers ::resolveServicesAndParameters
+   */
+  public function testGetForNonExistantParameterDependency() {
+    $service = $this->container->get('service_parameter_not_exists', ContainerInterface::NULL_ON_INVALID_REFERENCE);
+    $this->assertNull($service, 'Service is NULL.');
+  }
+
+  /**
+   * Tests Container::get() with an exception due to missing parameter on the second call.
+   *
+   * @covers ::get
+   * @covers ::createService
+   * @covers ::resolveServicesAndParameters
+   */
+  public function testGetForParameterDependencyWithExceptionOnSecondCall() {
+    $service = $this->container->get('service_parameter_not_exists', ContainerInterface::NULL_ON_INVALID_REFERENCE);
+    $this->assertNull($service, 'Service is NULL.');
+
+    // Reset the service.
+    $this->container->set('service_parameter_not_exists', NULL);
+    if (method_exists($this, 'expectException')) {
+      $this->expectException(InvalidArgumentException::class);
+    }
+    else {
+      $this->setExpectedException(InvalidArgumentException::class);
+    }
+    $this->container->get('service_parameter_not_exists');
+  }
+
+  /**
+   * Tests that Container::get() for non-existent parameters works properly.
+   *
+   * @covers ::get
+   * @covers ::createService
+   * @covers ::resolveServicesAndParameters
+   */
+  public function testGetForNonExistantParameterDependencyWithException() {
+    if (method_exists($this, 'expectException')) {
+      $this->expectException(InvalidArgumentException::class);
+    }
+    else {
+      $this->setExpectedException(InvalidArgumentException::class);
+    }
+    $this->container->get('service_parameter_not_exists');
+  }
+
+  /**
+   * Tests that Container::get() for non-existent dependencies works properly.
+   *
+   * @covers ::get
+   * @covers ::createService
+   * @covers ::resolveServicesAndParameters
+   */
+  public function testGetForNonExistantServiceDependency() {
+    $service = $this->container->get('service_dependency_not_exists', ContainerInterface::NULL_ON_INVALID_REFERENCE);
+    $this->assertNull($service, 'Service is NULL.');
+  }
+
+  /**
+   * Tests that Container::get() for non-existent dependencies works properly.
+   *
+   * @covers ::get
+   * @covers ::createService
+   * @covers ::resolveServicesAndParameters
+   * @covers ::getAlternatives
+   */
+  public function testGetForNonExistantServiceDependencyWithException() {
+    if (method_exists($this, 'expectException')) {
+      $this->expectException(ServiceNotFoundException::class);
+    }
+    else {
+      $this->setExpectedException(ServiceNotFoundException::class);
+    }
+    $this->container->get('service_dependency_not_exists');
+  }
+
+  /**
+   * Tests that Container::get() for non-existent services works properly.
+   *
+   * @covers ::get
+   * @covers ::createService
+   */
+  public function testGetForNonExistantServiceWhenUsingNull() {
+    $this->assertNull($this->container->get('service_not_exists', ContainerInterface::NULL_ON_INVALID_REFERENCE), 'Not found service does not throw exception.');
+  }
+
+  /**
+   * Tests that Container::get() for NULL service works properly.
+   * @covers ::get
+   * @covers ::createService
+   */
+  public function testGetForNonExistantNULLService() {
+    if (method_exists($this, 'expectException')) {
+      $this->expectException(ServiceNotFoundException::class);
+    }
+    else {
+      $this->setExpectedException(ServiceNotFoundException::class);
+    }
+    $this->container->get(NULL);
+  }
+
+  /**
+   * Tests multiple Container::get() calls for non-existing dependencies work.
+   *
+   * @covers ::get
+   * @covers ::createService
+   */
+  public function testGetForNonExistantServiceMultipleTimes() {
+    $container = new $this->containerClass();
+
+    $this->assertNull($container->get('service_not_exists', ContainerInterface::NULL_ON_INVALID_REFERENCE), 'Not found service does not throw exception.');
+    $this->assertNull($container->get('service_not_exists', ContainerInterface::NULL_ON_INVALID_REFERENCE), 'Not found service does not throw exception on second call.');
+  }
+
+  /**
+   * Tests multiple Container::get() calls with exception on the second time.
+   *
+   * @covers ::get
+   * @covers ::createService
+   * @covers ::getAlternatives
+   */
+  public function testGetForNonExistantServiceWithExceptionOnSecondCall() {
+    $this->assertNull($this->container->get('service_not_exists', ContainerInterface::NULL_ON_INVALID_REFERENCE), 'Not found service does nto throw exception.');
+    if (method_exists($this, 'expectException')) {
+      $this->expectException(ServiceNotFoundException::class);
+    }
+    else {
+      $this->setExpectedException(ServiceNotFoundException::class);
+    }
+    $this->container->get('service_not_exists');
+  }
+
+  /**
+   * Tests that Container::get() for aliased services works properly.
+   *
+   * @covers ::get
+   * @covers ::createService
+   */
+  public function testGetForAliasedService() {
+    $service = $this->container->get('service.provider');
+    $aliased_service = $this->container->get('service.provider_alias');
+    $this->assertSame($service, $aliased_service);
+  }
+
+  /**
+   * Tests that Container::get() for synthetic services works - if defined.
+   *
+   * @covers ::get
+   * @covers ::createService
+   */
+  public function testGetForSyntheticService() {
+    $synthetic_service = new \stdClass();
+    $this->container->set('synthetic', $synthetic_service);
+    $test_service = $this->container->get('synthetic');
+    $this->assertSame($synthetic_service, $test_service);
+  }
+
+  /**
+   * Tests that Container::get() for synthetic services throws an Exception if not defined.
+   *
+   * @covers ::get
+   * @covers ::createService
+   */
+  public function testGetForSyntheticServiceWithException() {
+    if (method_exists($this, 'expectException')) {
+      $this->expectException(RuntimeException::class);
+    }
+    else {
+      $this->setExpectedException(RuntimeException::class);
+    }
+    $this->container->get('synthetic');
+  }
+
+  /**
+   * Tests that Container::get() for services with file includes works.
+   *
+   * @covers ::get
+   * @covers ::createService
+   */
+  public function testGetWithFileInclude() {
+    $file_service = $this->container->get('container_test_file_service_test');
+    $this->assertTrue(function_exists('container_test_file_service_test_service_function'));
+    $this->assertEquals('Hello Container', container_test_file_service_test_service_function());
+  }
+
+  /**
+   * Tests that Container::get() for various arguments lengths works.
+   *
+   * @covers ::get
+   * @covers ::createService
+   * @covers ::resolveServicesAndParameters
+   */
+  public function testGetForInstantiationWithVariousArgumentLengths() {
+    $args = [];
+    for ($i = 0; $i < 12; $i++) {
+      $instantiation_service = $this->container->get('service_test_instantiation_' . $i);
+      $this->assertEquals($args, $instantiation_service->getArguments());
+      $args[] = 'arg_' . $i;
+    }
+  }
+
+  /**
+   * Tests that Container::get() for wrong factories works correctly.
+   *
+   * @covers ::get
+   * @covers ::createService
+   */
+  public function testGetForWrongFactory() {
+    if (method_exists($this, 'expectException')) {
+      $this->expectException(RuntimeException::class);
+    }
+    else {
+      $this->setExpectedException(RuntimeException::class);
+    }
+    $this->container->get('wrong_factory');
+  }
+
+  /**
+   * Tests Container::get() for factories via services (Symfony 2.7.0).
+   *
+   * @covers ::get
+   * @covers ::createService
+   */
+  public function testGetForFactoryService() {
+    $factory_service = $this->container->get('factory_service');
+    $factory_service_class = $this->container->getParameter('factory_service_class');
+    $this->assertInstanceOf($factory_service_class, $factory_service);
+  }
+
+  /**
+   * Tests that Container::get() for factories via class works (Symfony 2.7.0).
+   *
+   * @covers ::get
+   * @covers ::createService
+   */
+  public function testGetForFactoryClass() {
+    $service = $this->container->get('service.provider');
+    $factory_service = $this->container->get('factory_class');
+
+    $this->assertInstanceOf(get_class($service), $factory_service);
+    $this->assertEquals('bar', $factory_service->getSomeParameter(), 'Correct parameter was passed via the factory class instantiation.');
+    $this->assertEquals($this->container, $factory_service->getContainer(), 'Container was injected via setter injection.');
+  }
+
+  /**
+   * Tests that Container::get() for configurable services throws an Exception.
+   *
+   * @covers ::get
+   * @covers ::createService
+   */
+  public function testGetForConfiguratorWithException() {
+    if (method_exists($this, 'expectException')) {
+      $this->expectException(InvalidArgumentException::class);
+    }
+    else {
+      $this->setExpectedException(InvalidArgumentException::class);
+    }
+    $this->container->get('configurable_service_exception');
+  }
+
+  /**
+   * Tests that Container::get() for configurable services works.
+   *
+   * @covers ::get
+   * @covers ::createService
+   */
+  public function testGetForConfigurator() {
+    $container = $this->container;
+
+    // Setup a configurator.
+    $configurator = $this->prophesize('\Drupal\Tests\Component\DependencyInjection\MockConfiguratorInterface');
+    $configurator->configureService(Argument::type('object'))
+      ->shouldBeCalled(1)
+      ->will(function ($args) use ($container) {
+        $args[0]->setContainer($container);
+      });
+    $container->set('configurator', $configurator->reveal());
+
+    // Test that the configurator worked.
+    $service = $container->get('configurable_service');
+    $this->assertSame($container, $service->getContainer(), 'Container was injected via configurator.');
+  }
+
+  /**
+   * Tests that private services work correctly.
+   *
+   * @covers ::get
+   * @covers ::createService
+   * @covers ::resolveServicesAndParameters
+   */
+  public function testResolveServicesAndParametersForPrivateService() {
+    $service = $this->container->get('service_using_private');
+    $private_service = $service->getSomeOtherService();
+    $this->assertEquals($private_service->getSomeParameter(), 'really_private_lama', 'Private was found successfully.');
+
+    // Test that sharing the same private services works.
+    $service = $this->container->get('another_service_using_private');
+    $another_private_service = $service->getSomeOtherService();
+    $this->assertNotSame($private_service, $another_private_service, 'Private service is not shared.');
+    $this->assertEquals($private_service->getSomeParameter(), 'really_private_lama', 'Private was found successfully.');
+  }
+
+  /**
+   * Tests that private service sharing works correctly.
+   *
+   * @covers ::get
+   * @covers ::createService
+   * @covers ::resolveServicesAndParameters
+   */
+  public function testResolveServicesAndParametersForSharedPrivateService() {
+    $service = $this->container->get('service_using_shared_private');
+    $private_service = $service->getSomeOtherService();
+    $this->assertEquals($private_service->getSomeParameter(), 'really_private_lama', 'Private was found successfully.');
+
+    // Test that sharing the same private services works.
+    $service = $this->container->get('another_service_using_shared_private');
+    $same_private_service = $service->getSomeOtherService();
+    $this->assertSame($private_service, $same_private_service, 'Private service is shared.');
+    $this->assertEquals($private_service->getSomeParameter(), 'really_private_lama', 'Private was found successfully.');
+  }
+
+  /**
+   * Tests that services with an array of arguments work correctly.
+   *
+   * @covers ::get
+   * @covers ::createService
+   * @covers ::resolveServicesAndParameters
+   */
+  public function testResolveServicesAndParametersForArgumentsUsingDeepArray() {
+    $service = $this->container->get('service_using_array');
+    $other_service = $this->container->get('other.service');
+    $this->assertEquals($other_service, $service->getSomeOtherService(), '@other.service was injected via constructor.');
+  }
+
+  /**
+   * Tests that services that are optional work correctly.
+   *
+   * @covers ::get
+   * @covers ::createService
+   * @covers ::resolveServicesAndParameters
+   */
+  public function testResolveServicesAndParametersForOptionalServiceDependencies() {
+    $service = $this->container->get('service_with_optional_dependency');
+    $this->assertNull($service->getSomeOtherService(), 'other service was NULL was expected.');
+  }
+
+  /**
+   * Tests that an invalid argument throw an Exception.
+   *
+   * @covers ::get
+   * @covers ::createService
+   * @covers ::resolveServicesAndParameters
+   */
+  public function testResolveServicesAndParametersForInvalidArgument() {
+    if (method_exists($this, 'expectException')) {
+      $this->expectException(InvalidArgumentException::class);
+    }
+    else {
+      $this->setExpectedException(InvalidArgumentException::class);
+    }
+    $this->container->get('invalid_argument_service');
+  }
+
+  /**
+   * Tests that invalid arguments throw an Exception.
+   *
+   * @covers ::get
+   * @covers ::createService
+   * @covers ::resolveServicesAndParameters
+   */
+  public function testResolveServicesAndParametersForInvalidArguments() {
+    // In case the machine-optimized format is not used, we need to simulate the
+    // test failure.
+    if (method_exists($this, 'expectException')) {
+      $this->expectException(InvalidArgumentException::class);
+    }
+    else {
+      $this->setExpectedException(InvalidArgumentException::class);
+    }
+    if (!$this->machineFormat) {
+      throw new InvalidArgumentException('Simulating the test failure.');
+    }
+    $this->container->get('invalid_arguments_service');
+  }
+
+  /**
+   * Tests that a parameter that points to a service works correctly.
+   *
+   * @covers ::get
+   * @covers ::createService
+   * @covers ::resolveServicesAndParameters
+   */
+  public function testResolveServicesAndParametersForServiceInstantiatedFromParameter() {
+    $service = $this->container->get('service.provider');
+    $test_service = $this->container->get('service_with_parameter_service');
+    $this->assertSame($service, $test_service->getSomeOtherService(), 'Service was passed via parameter.');
+  }
+
+  /**
+   * Tests that Container::initialized works correctly.
+   *
+   * @covers ::initialized
+   */
+  public function testInitialized() {
+    $this->assertFalse($this->container->initialized('late.service'), 'Late service is not initialized.');
+    $this->container->get('late.service');
+    $this->assertTrue($this->container->initialized('late.service'), 'Late service is initialized after it was retrieved once.');
+  }
+
+  /**
+   * Tests that Container::initialized works correctly for aliases.
+   *
+   * @covers ::initialized
+   */
+  public function testInitializedForAliases() {
+    $this->assertFalse($this->container->initialized('late.service_alias'), 'Late service is not initialized.');
+    $this->container->get('late.service');
+    $this->assertTrue($this->container->initialized('late.service_alias'), 'Late service is initialized after it was retrieved once.');
+  }
+
+  /**
+   * Tests that Container::getServiceIds() works properly.
+   *
+   * @covers ::getServiceIds
+   */
+  public function testGetServiceIds() {
+    $service_definition_keys = array_keys($this->containerDefinition['services']);
+    $this->assertEquals($service_definition_keys, $this->container->getServiceIds(), 'Retrieved service IDs match definition.');
+
+    $mock_service = new MockService();
+    $this->container->set('bar', $mock_service);
+    $this->container->set('service.provider', $mock_service);
+    $service_definition_keys[] = 'bar';
+
+    $this->assertEquals($service_definition_keys, $this->container->getServiceIds(), 'Retrieved service IDs match definition after setting new services.');
+  }
+
+  /**
+   * Gets a mock container definition.
+   *
+   * @return array
+   *   Associated array with parameters and services.
+   */
+  protected function getMockContainerDefinition() {
+    $fake_service = new \stdClass();
+    $parameters = [];
+    $parameters['some_parameter_class'] = get_class($fake_service);
+    $parameters['some_private_config'] = 'really_private_lama';
+    $parameters['some_config'] = 'foo';
+    $parameters['some_other_config'] = 'lama';
+    $parameters['factory_service_class'] = get_class($fake_service);
+    // Also test alias resolving.
+    $parameters['service_from_parameter'] = $this->getServiceCall('service.provider_alias');
+
+    $services = [];
+    $services['service_container'] = [
+      'class' => '\Drupal\service_container\DependencyInjection\Container',
+    ];
+    $services['other.service'] = [
+      'class' => get_class($fake_service),
+    ];
+
+    $services['non_shared_service'] = [
+      'class' => get_class($fake_service),
+      'shared' => FALSE,
+    ];
+
+    $services['other.service_class_from_parameter'] = [
+      'class' => $this->getParameterCall('some_parameter_class'),
+    ];
+    $services['late.service'] = [
+      'class' => get_class($fake_service),
+    ];
+    $services['service.provider'] = [
+      'class' => '\Drupal\Tests\Component\DependencyInjection\MockService',
+      'arguments' => $this->getCollection([
+        $this->getServiceCall('other.service'),
+        $this->getParameterCall('some_config'),
+      ]),
+      'properties' => $this->getCollection(['_someProperty' => 'foo']),
+      'calls' => [
+        [
+          'setContainer',
+          $this->getCollection([
+            $this->getServiceCall('service_container'),
+          ]),
+        ],
+        [
+          'setOtherConfigParameter',
+          $this->getCollection([
+            $this->getParameterCall('some_other_config'),
+          ]),
+        ],
+      ],
+      'priority' => 0,
+    ];
+
+    // Test private services.
+    $private_service = [
+      'class' => '\Drupal\Tests\Component\DependencyInjection\MockService',
+      'arguments' => $this->getCollection([
+        $this->getServiceCall('other.service'),
+        $this->getParameterCall('some_private_config'),
+      ]),
+      'public' => FALSE,
+    ];
+
+    $services['service_using_private'] = [
+      'class' => '\Drupal\Tests\Component\DependencyInjection\MockService',
+      'arguments' => $this->getCollection([
+        $this->getPrivateServiceCall(NULL, $private_service),
+        $this->getParameterCall('some_config'),
+      ]),
+    ];
+    $services['another_service_using_private'] = [
+      'class' => '\Drupal\Tests\Component\DependencyInjection\MockService',
+      'arguments' => $this->getCollection([
+        $this->getPrivateServiceCall(NULL, $private_service),
+        $this->getParameterCall('some_config'),
+      ]),
+    ];
+
+    // Test shared private services.
+    $id = 'private_service_shared_1';
+
+    $services['service_using_shared_private'] = [
+      'class' => '\Drupal\Tests\Component\DependencyInjection\MockService',
+      'arguments' => $this->getCollection([
+        $this->getPrivateServiceCall($id, $private_service, TRUE),
+        $this->getParameterCall('some_config'),
+      ]),
+    ];
+    $services['another_service_using_shared_private'] = [
+      'class' => '\Drupal\Tests\Component\DependencyInjection\MockService',
+      'arguments' => $this->getCollection([
+        $this->getPrivateServiceCall($id, $private_service, TRUE),
+        $this->getParameterCall('some_config'),
+      ]),
+    ];
+
+    // Tests service with invalid argument.
+    $services['invalid_argument_service'] = [
+      'class' => '\Drupal\Tests\Component\DependencyInjection\MockService',
+      'arguments' => $this->getCollection([
+        // Test passing non-strings, too.
+        1,
+        (object) [
+          'type' => 'invalid',
+        ],
+      ]),
+    ];
+
+    $services['invalid_arguments_service'] = [
+      'class' => '\Drupal\Tests\Component\DependencyInjection\MockService',
+      'arguments' => (object) [
+        'type' => 'invalid',
+      ],
+    ];
+
+    // Test service that needs deep-traversal.
+    $services['service_using_array'] = [
+      'class' => '\Drupal\Tests\Component\DependencyInjection\MockService',
+      'arguments' => $this->getCollection([
+        $this->getCollection([
+          $this->getServiceCall('other.service'),
+        ]),
+        $this->getParameterCall('some_private_config'),
+      ]),
+    ];
+
+    $services['service_with_optional_dependency'] = [
+      'class' => '\Drupal\Tests\Component\DependencyInjection\MockService',
+      'arguments' => $this->getCollection([
+        $this->getServiceCall('service.does_not_exist', ContainerInterface::NULL_ON_INVALID_REFERENCE),
+        $this->getParameterCall('some_private_config'),
+      ]),
+
+    ];
+
+    $services['factory_service'] = [
+      'class' => '\Drupal\service_container\ServiceContainer\ControllerInterface',
+      'factory' => [
+        $this->getServiceCall('service.provider'),
+        'getFactoryMethod',
+      ],
+      'arguments' => $this->getCollection([
+        $this->getParameterCall('factory_service_class'),
+      ]),
+    ];
+    $services['factory_class'] = [
+      'class' => '\Drupal\service_container\ServiceContainer\ControllerInterface',
+      'factory' => '\Drupal\Tests\Component\DependencyInjection\MockService::getFactoryMethod',
+      'arguments' => [
+        '\Drupal\Tests\Component\DependencyInjection\MockService',
+        [NULL, 'bar'],
+      ],
+      'calls' => [
+        [
+          'setContainer',
+          $this->getCollection([
+            $this->getServiceCall('service_container'),
+          ]),
+        ],
+      ],
+    ];
+
+    $services['wrong_factory'] = [
+      'class' => '\Drupal\service_container\ServiceContainer\ControllerInterface',
+      'factory' => (object) ['I am not a factory, but I pretend to be.'],
+    ];
+
+    $services['circular_dependency'] = [
+      'class' => '\Drupal\Tests\Component\DependencyInjection\MockService',
+      'arguments' => $this->getCollection([
+        $this->getServiceCall('circular_dependency'),
+      ]),
+    ];
+    $services['synthetic'] = [
+      'synthetic' => TRUE,
+    ];
+    // The file could have been named as a .php file. The reason it is a .data
+    // file is that SimpleTest tries to load it. SimpleTest does not like such
+    // fixtures and hence we use a neutral name like .data.
+    $services['container_test_file_service_test'] = [
+      'class' => '\stdClass',
+      'file' => __DIR__ . '/Fixture/container_test_file_service_test_service_function.data',
+    ];
+
+    // Test multiple arguments.
+    $args = [];
+    for ($i = 0; $i < 12; $i++) {
+      $services['service_test_instantiation_' . $i] = [
+        'class' => '\Drupal\Tests\Component\DependencyInjection\MockInstantiationService',
+        // Also test a collection that does not need resolving.
+        'arguments' => $this->getCollection($args, FALSE),
+      ];
+      $args[] = 'arg_' . $i;
+    }
+
+    $services['service_parameter_not_exists'] = [
+      'class' => '\Drupal\Tests\Component\DependencyInjection\MockService',
+      'arguments' => $this->getCollection([
+        $this->getServiceCall('service.provider'),
+        $this->getParameterCall('not_exists'),
+      ]),
+    ];
+    $services['service_dependency_not_exists'] = [
+      'class' => '\Drupal\Tests\Component\DependencyInjection\MockService',
+      'arguments' => $this->getCollection([
+        $this->getServiceCall('service_not_exists'),
+        $this->getParameterCall('some_config'),
+      ]),
+    ];
+
+    $services['service_with_parameter_service'] = [
+      'class' => '\Drupal\Tests\Component\DependencyInjection\MockService',
+      'arguments' => $this->getCollection([
+        $this->getParameterCall('service_from_parameter'),
+        // Also test deep collections that don't need resolving.
+        $this->getCollection([
+          1,
+        ], FALSE),
+      ]),
+    ];
+
+    // To ensure getAlternatives() finds something.
+    $services['service_not_exists_similar'] = [
+      'synthetic' => TRUE,
+    ];
+
+    // Test configurator.
+    $services['configurator'] = [
+      'synthetic' => TRUE,
+    ];
+    $services['configurable_service'] = [
+      'class' => '\Drupal\Tests\Component\DependencyInjection\MockService',
+      'arguments' => [],
+      'configurator' => [
+        $this->getServiceCall('configurator'),
+        'configureService'
+      ],
+    ];
+    $services['configurable_service_exception'] = [
+      'class' => '\Drupal\Tests\Component\DependencyInjection\MockService',
+      'arguments' => [],
+      'configurator' => 'configurator_service_test_does_not_exist',
+    ];
+
+    $aliases = [];
+    $aliases['service.provider_alias'] = 'service.provider';
+    $aliases['late.service_alias'] = 'late.service';
+
+    return [
+      'aliases' => $aliases,
+      'parameters' => $parameters,
+      'services' => $services,
+      'frozen' => TRUE,
+      'machine_format' => $this->machineFormat,
+    ];
+  }
+
+  /**
+   * Helper function to return a service definition.
+   */
+  protected function getServiceCall($id, $invalid_behavior = ContainerInterface::EXCEPTION_ON_INVALID_REFERENCE) {
+    return (object) [
+      'type' => 'service',
+      'id' => $id,
+      'invalidBehavior' => $invalid_behavior,
+    ];
+  }
+
+  /**
+   * Helper function to return a service definition.
+   */
+  protected function getParameterCall($name) {
+    return (object) [
+      'type' => 'parameter',
+      'name' => $name,
+    ];
+  }
+
+  /**
+   * Helper function to return a private service definition.
+   */
+  protected function getPrivateServiceCall($id, $service_definition, $shared = FALSE) {
+    if (!$id) {
+      $hash = Crypt::hashBase64(serialize($service_definition));
+      $id = 'private__' . $hash;
+    }
+    return (object) [
+      'type' => 'private_service',
+      'id' => $id,
+      'value' => $service_definition,
+      'shared' => $shared,
+    ];
+  }
+
+  /**
+   * Helper function to return a machine-optimized collection.
+   */
+  protected function getCollection($collection, $resolve = TRUE) {
+    return (object) [
+      'type' => 'collection',
+      'value' => $collection,
+      'resolve' => $resolve,
+    ];
+  }
+
+}
+
+/**
+ * Helper interface to test Container::get() with configurator.
+ *
+ * @group DependencyInjection
+ */
+interface MockConfiguratorInterface {
+
+  /**
+   * Configures a service.
+   *
+   * @param object $service
+   *   The service to configure.
+   */
+  public function configureService($service);
+
+}
+
+
+/**
+ * Helper class to test Container::get() method for varying number of parameters.
+ *
+ * @group DependencyInjection
+ */
+class MockInstantiationService {
+
+  /**
+   * @var mixed[]
+   */
+  protected $arguments;
+
+  /**
+   * Construct a mock instantiation service.
+   */
+  public function __construct() {
+    $this->arguments = func_get_args();
+  }
+
+  /**
+   * Return arguments injected into the service.
+   *
+   * @return mixed[]
+   *   Return the passed arguments.
+   */
+  public function getArguments() {
+    return $this->arguments;
+  }
+
+}
+
+
+/**
+ * Helper class to test Container::get() method.
+ *
+ * @group DependencyInjection
+ */
+class MockService {
+
+  /**
+   * @var \Symfony\Component\DependencyInjection\ContainerInterface
+   */
+  protected $container;
+
+  /**
+   * @var object
+   */
+  protected $someOtherService;
+
+  /**
+   * @var string
+   */
+  protected $someParameter;
+
+  /**
+   * @var string
+   */
+  protected $someOtherParameter;
+
+  /**
+   * Constructs a MockService object.
+   *
+   * @param object $some_other_service
+   *   (optional) Another injected service.
+   * @param string $some_parameter
+   *   (optional) An injected parameter.
+   */
+  public function __construct($some_other_service = NULL, $some_parameter = NULL) {
+    if (is_array($some_other_service)) {
+      $some_other_service = $some_other_service[0];
+    }
+    $this->someOtherService = $some_other_service;
+    $this->someParameter = $some_parameter;
+  }
+
+  /**
+   * Sets the container object.
+   *
+   * @param \Symfony\Component\DependencyInjection\ContainerInterface $container
+   *   The container to inject via setter injection.
+   */
+  public function setContainer(ContainerInterface $container) {
+    $this->container = $container;
+  }
+
+  /**
+   * Gets the container object.
+   *
+   * @return \Symfony\Component\DependencyInjection\ContainerInterface
+   *   The internally set container.
+   */
+  public function getContainer() {
+    return $this->container;
+  }
+
+  /**
+   * Gets the someOtherService object.
+   *
+   * @return object
+   *   The injected service.
+   */
+  public function getSomeOtherService() {
+    return $this->someOtherService;
+  }
+
+  /**
+   * Gets the someParameter property.
+   *
+   * @return string
+   *   The injected parameter.
+   */
+  public function getSomeParameter() {
+    return $this->someParameter;
+  }
+
+  /**
+   * Sets the someOtherParameter property.
+   *
+   * @param string $some_other_parameter
+   *   The setter injected parameter.
+   */
+  public function setOtherConfigParameter($some_other_parameter) {
+    $this->someOtherParameter = $some_other_parameter;
+  }
+
+  /**
+   * Gets the someOtherParameter property.
+   *
+   * @return string
+   *   The injected parameter.
+   */
+  public function getSomeOtherParameter() {
+    return $this->someOtherParameter;
+  }
+
+  /**
+   * Provides a factory method to get a service.
+   *
+   * @param string $class
+   *   The class name of the class to instantiate
+   * @param array $arguments
+   *   (optional) Arguments to pass to the new class.
+   *
+   * @return object
+   *   The instantiated service object.
+   */
+  public static function getFactoryMethod($class, $arguments = []) {
+    $r = new \ReflectionClass($class);
+    $service = ($r->getConstructor() === NULL) ? $r->newInstance() : $r->newInstanceArgs($arguments);
+
+    return $service;
+  }
+
+}