class ProxyBuilderTest

class ProxyBuilderTest extends TestCase {
  
  /**
   * The tested proxy builder.
   *
   * @var \Drupal\Component\ProxyBuilder\ProxyBuilder
   */
  protected $proxyBuilder;
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    $this->proxyBuilder = new ProxyBuilder();
  }
  
  /**
   * @covers ::buildProxyClassName
   */
  public function testBuildProxyClassName() : void {
    $class_name = $this->proxyBuilder
      ->buildProxyClassName('Drupal\\Tests\\Component\\ProxyBuilder\\TestServiceNoMethod');
    $this->assertEquals('Drupal\\Tests\\ProxyClass\\Component\\ProxyBuilder\\TestServiceNoMethod', $class_name);
  }
  
  /**
   * @covers ::buildProxyClassName
   */
  public function testBuildProxyClassNameForModule() : void {
    $class_name = $this->proxyBuilder
      ->buildProxyClassName('Drupal\\views_ui\\ParamConverter\\ViewUIConverter');
    $this->assertEquals('Drupal\\views_ui\\ProxyClass\\ParamConverter\\ViewUIConverter', $class_name);
  }
  
  /**
   * @covers ::buildProxyNamespace
   */
  public function testBuildProxyNamespace() : void {
    $class_name = $this->proxyBuilder
      ->buildProxyNamespace('Drupal\\Tests\\Component\\ProxyBuilder\\TestServiceNoMethod');
    $this->assertEquals('Drupal\\Tests\\ProxyClass\\Component\\ProxyBuilder', $class_name);
  }
  
  /**
   * Tests the basic methods like the constructor and the lazyLoadItself method.
   *
   * @covers ::build
   * @covers ::buildConstructorMethod
   * @covers ::buildLazyLoadItselfMethod
   */
  public function testBuildNoMethod() : void {
    $class = 'Drupal\\Tests\\Component\\ProxyBuilder\\TestServiceNoMethod';
    $result = $this->proxyBuilder
      ->build($class);
    $this->assertEquals($this->buildExpectedClass($class, ''), $result);
  }
  
  /**
   * @covers ::buildMethod
   * @covers ::buildMethodBody
   */
  public function testBuildSimpleMethod() : void {
    $class = 'Drupal\\Tests\\Component\\ProxyBuilder\\TestServiceSimpleMethod';
    $result = $this->proxyBuilder
      ->build($class);
    $method_body = <<<'EOS'

/**
 * {@inheritdoc}
 */
public function method()
{
    return $this->lazyLoadItself()->method();
}

EOS;
    $this->assertEquals($this->buildExpectedClass($class, $method_body), $result);
  }
  
  /**
   * @covers ::buildMethod
   * @covers ::buildParameter
   * @covers ::buildMethodBody
   */
  public function testBuildMethodWithParameter() : void {
    $class = 'Drupal\\Tests\\Component\\ProxyBuilder\\TestServiceMethodWithParameter';
    $result = $this->proxyBuilder
      ->build($class);
    $method_body = <<<'EOS'

/**
 * {@inheritdoc}
 */
public function methodWithParameter($parameter)
{
    return $this->lazyLoadItself()->methodWithParameter($parameter);
}

EOS;
    $this->assertEquals($this->buildExpectedClass($class, $method_body), $result);
  }
  
  /**
   * @covers ::buildMethod
   * @covers ::buildParameter
   * @covers ::buildMethodBody
   */
  public function testBuildComplexMethod() : void {
    $class = 'Drupal\\Tests\\Component\\ProxyBuilder\\TestServiceComplexMethod';
    $result = $this->proxyBuilder
      ->build($class);
    // @todo Solve the silly linebreak for array()
    $method_body = <<<'EOS'

/**
 * {@inheritdoc}
 */
public function complexMethod(string $parameter, callable $function, ?\Drupal\Tests\Component\ProxyBuilder\TestServiceNoMethod $test_service = NULL, array &$elements = array (
)): array
{
    return $this->lazyLoadItself()->complexMethod($parameter, $function, $test_service, $elements);
}

EOS;
    $this->assertEquals($this->buildExpectedClass($class, $method_body), $result);
  }
  
  /**
   * @covers ::buildMethodBody
   */
  public function testBuildServiceMethodReturnsVoid() : void {
    $class = TestServiceMethodReturnsVoid::class;
    $result = $this->proxyBuilder
      ->build($class);
    // @todo Solve the silly linebreak for array()
    $method_body = <<<'EOS'

/**
 * {@inheritdoc}
 */
public function methodReturnsVoid(string $parameter): void
{
    $this->lazyLoadItself()->methodReturnsVoid($parameter);
}

EOS;
    $this->assertEquals($this->buildExpectedClass($class, $method_body), $result);
  }
  
  /**
   * @covers ::buildMethod
   * @covers ::buildMethodBody
   */
  public function testBuildReturnReference() : void {
    $class = 'Drupal\\Tests\\Component\\ProxyBuilder\\TestServiceReturnReference';
    $result = $this->proxyBuilder
      ->build($class);
    // @todo Solve the silly linebreak for array()
    $method_body = <<<'EOS'

/**
 * {@inheritdoc}
 */
public function &returnReference()
{
    return $this->lazyLoadItself()->returnReference();
}

EOS;
    $this->assertEquals($this->buildExpectedClass($class, $method_body), $result);
  }
  
  /**
   * @covers ::buildMethod
   * @covers ::buildParameter
   * @covers ::buildMethodBody
   */
  public function testBuildWithInterface() : void {
    $class = 'Drupal\\Tests\\Component\\ProxyBuilder\\TestServiceWithInterface';
    $result = $this->proxyBuilder
      ->build($class);
    $method_body = <<<'EOS'

/**
 * {@inheritdoc}
 */
public function testMethod($parameter)
{
    return $this->lazyLoadItself()->testMethod($parameter);
}

EOS;
    $interface_string = ' implements \\Drupal\\Tests\\Component\\ProxyBuilder\\TestInterface';
    $this->assertEquals($this->buildExpectedClass($class, $method_body, $interface_string), $result);
  }
  
  /**
   * @covers ::build
   */
  public function testBuildWithNestedInterface() : void {
    $class = 'Drupal\\Tests\\Component\\ProxyBuilder\\TestServiceWithChildInterfaces';
    $result = $this->proxyBuilder
      ->build($class);
    $method_body = '';
    $interface_string = ' implements \\Drupal\\Tests\\Component\\ProxyBuilder\\TestChildInterface';
    $this->assertEquals($this->buildExpectedClass($class, $method_body, $interface_string), $result);
  }
  
  /**
   * @covers ::buildMethod
   * @covers ::buildParameter
   * @covers ::buildMethodBody
   */
  public function testBuildWithProtectedAndPrivateMethod() : void {
    $class = 'Drupal\\Tests\\Component\\ProxyBuilder\\TestServiceWithProtectedMethods';
    $result = $this->proxyBuilder
      ->build($class);
    $method_body = <<<'EOS'

/**
 * {@inheritdoc}
 */
public function testMethod($parameter)
{
    return $this->lazyLoadItself()->testMethod($parameter);
}

EOS;
    $this->assertEquals($this->buildExpectedClass($class, $method_body), $result);
  }
  
  /**
   * @covers ::buildMethod
   * @covers ::buildParameter
   * @covers ::buildMethodBody
   */
  public function testBuildWithPublicStaticMethod() : void {
    $class = 'Drupal\\Tests\\Component\\ProxyBuilder\\TestServiceWithPublicStaticMethod';
    $result = $this->proxyBuilder
      ->build($class);
    // Ensure that the static method is not wrapped.
    $method_body = <<<'EOS'

/**
 * {@inheritdoc}
 */
public static function testMethod($parameter)
{
    \Drupal\Tests\Component\ProxyBuilder\TestServiceWithPublicStaticMethod::testMethod($parameter);
}

EOS;
    $this->assertEquals($this->buildExpectedClass($class, $method_body), $result);
  }
  
  /**
   * @covers ::buildMethod
   * @covers ::buildParameter
   * @covers ::buildMethodBody
   */
  public function testBuildWithNullableSelfTypeHint() : void {
    $class = 'Drupal\\Tests\\Component\\ProxyBuilder\\TestServiceNullableTypeHintSelf';
    $result = $this->proxyBuilder
      ->build($class);
    // Ensure that the static method is not wrapped.
    $method_body = <<<'EOS'

/**
 * {@inheritdoc}
 */
public function typeHintSelf(?\Drupal\Tests\Component\ProxyBuilder\TestServiceNullableTypeHintSelf $parameter): ?\Drupal\Tests\Component\ProxyBuilder\TestServiceNullableTypeHintSelf
{
    return $this->lazyLoadItself()->typeHintSelf($parameter);
}

EOS;
    $this->assertEquals($this->buildExpectedClass($class, $method_body), $result);
  }
  
  /**
   * Constructs the expected class output.
   *
   * @param string $class
   *   The class name that is being built.
   * @param string $expected_methods_body
   *   The expected body of decorated methods.
   * @param string $interface_string
   *   (optional) The expected "implements" clause of the class definition.
   *
   * @return string
   *   The code of the entire proxy.
   */
  protected function buildExpectedClass($class, $expected_methods_body, $interface_string = '') {
    $namespace = ProxyBuilder::buildProxyNamespace($class);
    $reflection = new \ReflectionClass($class);
    $proxy_class = $reflection->getShortName();
    $expected_string = <<<'EOS'

namespace {{ namespace }} {

    /**
     * Provides a proxy class for \{{ class }}.
     *
     * @see \Drupal\Component\ProxyBuilder
     */
    class {{ proxy_class }}{{ interface_string }}
    {

        /**
         * The id of the original proxied service.
         *
         * @var string
         */
        protected $drupalProxyOriginalServiceId;

        /**
         * The real proxied service, after it was lazy loaded.
         *
         * @var \{{ class }}
         */
        protected $service;

        /**
         * The service container.
         *
         * @var \Symfony\Component\DependencyInjection\ContainerInterface
         */
        protected $container;

        /**
         * Constructs a ProxyClass Drupal proxy object.
         *
         * @param \Symfony\Component\DependencyInjection\ContainerInterface $container
         *   The container.
         * @param string $drupal_proxy_original_service_id
         *   The service ID of the original service.
         */
        public function __construct(\Symfony\Component\DependencyInjection\ContainerInterface $container, $drupal_proxy_original_service_id)
        {
            $this->container = $container;
            $this->drupalProxyOriginalServiceId = $drupal_proxy_original_service_id;
        }

        /**
         * Lazy loads the real service from the container.
         *
         * @return object
         *   Returns the constructed real service.
         */
        protected function lazyLoadItself()
        {
            if (!isset($this->service)) {
                $this->service = $this->container->get($this->drupalProxyOriginalServiceId);
            }

            return $this->service;
        }
{{ expected_methods_body }}
    }

}

EOS;
    $expected_methods_body = implode("\n", array_map(function ($value) {
      if ($value === '') {
        return $value;
      }
      return "        {$value}";
    }, explode("\n", $expected_methods_body)));
    $expected_string = str_replace('{{ proxy_class }}', $proxy_class, $expected_string);
    $expected_string = str_replace('{{ namespace }}', $namespace, $expected_string);
    $expected_string = str_replace('{{ class }}', $class, $expected_string);
    $expected_string = str_replace('{{ expected_methods_body }}', $expected_methods_body, $expected_string);
    $expected_string = str_replace('{{ interface_string }}', $interface_string, $expected_string);
    return $expected_string;
  }

}