class ParamConversionEnhancerTest

class ParamConversionEnhancerTest extends UnitTestCase {
  
  /**
   * @var \Drupal\Core\Routing\Enhancer\ParamConversionEnhancer
   */
  protected $paramConversionEnhancer;
  
  /**
   * @var \Drupal\Core\ParamConverter\ParamConverterManagerInterface|\PHPUnit\Framework\MockObject\MockObject
   */
  protected $paramConverterManager;
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    $this->paramConverterManager = $this->createMock('Drupal\\Core\\ParamConverter\\ParamConverterManagerInterface');
    $this->paramConversionEnhancer = new ParamConversionEnhancer($this->paramConverterManager);
  }
  
  /**
   * @covers ::enhance
   */
  public function testEnhance() {
    $route = new Route('/test/{id}/{literal}/{null}');
    $raw_variables = [
      'id' => 1,
      'literal' => 'this is a literal',
      'null' => NULL,
    ];
    $defaults = [
      RouteObjectInterface::ROUTE_OBJECT => $route,
    ] + $raw_variables;
    $expected = $defaults;
    $expected['id'] = 'something_better!';
    $expected['_raw_variables'] = new ParameterBag($raw_variables);
    $this->paramConverterManager
      ->expects($this->once())
      ->method('convert')
      ->with($this->isType('array'))
      ->willReturn($expected);
    $result = $this->paramConversionEnhancer
      ->enhance($defaults, new Request());
    $this->assertEquals($expected, $result);
    // Now run with the results as the new defaults to ensure that the
    // conversion is just run once.
    $result = $this->paramConversionEnhancer
      ->enhance($result, new Request());
    $this->assertEquals($expected, $result);
  }
  
  /**
   * @covers ::copyRawVariables
   */
  public function testCopyRawVariables() {
    $route = new Route('/test/{id}');
    $route->setDefault('node_type', 'page');
    $defaults = [
      RouteObjectInterface::ROUTE_OBJECT => $route,
      'id' => '1',
    ];
    // Set one default to mirror another by reference.
    $defaults['bar'] =& $defaults['id'];
    $this->paramConverterManager
      ->expects($this->any())
      ->method('convert')
      ->with($this->isType('array'))
      ->willReturnCallback(function ($defaults) {
      // Convert the mirrored default to another value.
      $defaults['bar'] = '2';
      return $defaults;
    });
    $expected = new ParameterBag([
      'id' => 1,
      'node_type' => 'page',
    ]);
    $result = $this->paramConversionEnhancer
      ->enhance($defaults, new Request());
    $this->assertEquals($result['_raw_variables'], $expected);
  }

}