class RouteMatchTestBase

abstract class RouteMatchTestBase extends UnitTestCase {
  
  /**
   * Build a test route match object for the given implementation.
   *
   * @param string $name
   *   Route name.
   * @param \Symfony\Component\Routing\Route $route
   *   Request object
   * @param array $parameters
   *   Parameters array
   * @param array $raw_parameters
   *   Raw parameters array
   *
   * @return \Drupal\Core\Routing\RouteMatchInterface
   */
  protected static abstract function getRouteMatch(string $name, Route $route, array $parameters, array $raw_parameters) : RouteMatchInterface;
  
  /**
   * Provide sets of parameters and expected parameters for parameter tests.
   */
  public static function routeMatchProvider() : array {
    $base_data = [
      [
        new Route('/test-route/{param_without_leading_underscore}/{_param_with_leading_underscore}', [
          'default_without_leading_underscore' => NULL,
          '_default_with_leading_underscore' => NULL,
        ]),
        [
          'param_without_leading_underscore' => 'value',
          '_param_with_leading_underscore' => 'value',
          'default_without_leading_underscore' => 'value',
          '_default_with_leading_underscore' => 'value',
          'foo' => 'value',
        ],
        // Parameters should be filtered to only those defined by the route.
        // Specifically:
        // - Path parameters, regardless of name.
        // - Defaults that are not path parameters only if they do not start with
        //   an underscore.
[
          'param_without_leading_underscore' => 'value',
          '_param_with_leading_underscore' => 'value',
          'default_without_leading_underscore' => 'value',
        ],
      ],
    ];
    $data = [];
    foreach ($base_data as $entry) {
      $route = $entry[0];
      $params = $entry[1];
      $expected_params = $entry[2];
      $data[] = [
        static::getRouteMatch('test_route', $route, $params, $params),
        $route,
        $params,
        $expected_params,
      ];
    }
    return $data;
  }
  
  /**
   * @covers ::getRouteName
   * @dataProvider routeMatchProvider
   */
  public function testGetRouteName(RouteMatchInterface $route_match) : void {
    $this->assertSame('test_route', $route_match->getRouteName());
  }
  
  /**
   * @covers ::getRouteObject
   * @dataProvider routeMatchProvider
   */
  public function testGetRouteObject(RouteMatchInterface $route_match, Route $route) : void {
    $this->assertSame($route, $route_match->getRouteObject());
  }
  
  /**
   * @covers ::getParameter
   * @covers \Drupal\Core\Routing\RouteMatch::getParameterNames
   * @dataProvider routeMatchProvider
   */
  public function testGetParameter(RouteMatchInterface $route_match, Route $route, array $parameters, array $expected_filtered_parameters) : void {
    foreach ($expected_filtered_parameters as $name => $expected_value) {
      $this->assertSame($expected_value, $route_match->getParameter($name));
    }
    foreach (array_diff_key($parameters, $expected_filtered_parameters) as $name) {
      $this->assertNull($route_match->getParameter($name));
    }
  }
  
  /**
   * @covers ::getParameters
   * @covers \Drupal\Core\Routing\RouteMatch::getParameterNames
   * @dataProvider routeMatchProvider
   */
  public function testGetParameters(RouteMatchInterface $route_match, Route $route, array $parameters, array $expected_filtered_parameters) : void {
    $this->assertSame($expected_filtered_parameters, $route_match->getParameters()
      ->all());
  }
  
  /**
   * @covers ::getRawParameter
   * @covers \Drupal\Core\Routing\RouteMatch::getParameterNames
   * @dataProvider routeMatchProvider
   */
  public function testGetRawParameter(RouteMatchInterface $route_match, Route $route, array $parameters, array $expected_filtered_parameters) : void {
    foreach ($expected_filtered_parameters as $name => $expected_value) {
      $this->assertSame($expected_value, $route_match->getRawParameter($name));
    }
    foreach (array_diff_key($parameters, $expected_filtered_parameters) as $name) {
      $this->assertNull($route_match->getRawParameter($name));
    }
  }
  
  /**
   * @covers ::getRawParameters
   * @covers \Drupal\Core\Routing\RouteMatch::getParameterNames
   * @dataProvider routeMatchProvider
   */
  public function testGetRawParameters(RouteMatchInterface $route_match, Route $route, array $parameters, array $expected_filtered_parameters) : void {
    $this->assertSame($expected_filtered_parameters, $route_match->getRawParameters()
      ->all());
  }

}