class ThemeNegotiatorTest

class ThemeNegotiatorTest extends UnitTestCase {
  
  /**
   * The mocked theme access checker.
   *
   * @var \Drupal\Core\Theme\ThemeAccessCheck|\PHPUnit\Framework\MockObject\MockObject
   */
  protected $themeAccessCheck;
  
  /**
   * The container builder.
   *
   * @var \Drupal\Core\DependencyInjection\ContainerBuilder
   */
  protected $container;
  
  /**
   * The request stack.
   *
   * @var \Symfony\Component\HttpFoundation\RequestStack
   */
  protected $requestStack;
  
  /**
   * The actual tested theme negotiator.
   *
   * @var \Drupal\Core\Theme\ThemeNegotiator
   */
  protected $themeNegotiator;
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    $this->themeAccessCheck = $this->getMockBuilder('\\Drupal\\Core\\Theme\\ThemeAccessCheck')
      ->disableOriginalConstructor()
      ->getMock();
    $this->container = new ContainerBuilder();
  }
  
  /**
   * Tests determining the theme.
   *
   * @see \Drupal\Core\Theme\ThemeNegotiator::determineActiveTheme()
   */
  public function testDetermineActiveTheme() {
    $negotiator = $this->createMock('Drupal\\Core\\Theme\\ThemeNegotiatorInterface');
    $negotiator->expects($this->once())
      ->method('determineActiveTheme')
      ->willReturn('example_test');
    $negotiator->expects($this->once())
      ->method('applies')
      ->willReturn(TRUE);
    $this->container
      ->set('test_negotiator', $negotiator);
    $negotiators = [
      'test_negotiator',
    ];
    $this->themeAccessCheck
      ->expects($this->any())
      ->method('checkAccess')
      ->willReturn(TRUE);
    $route_match = new RouteMatch('test_route', new Route('/test-route'), [], []);
    $theme = $this->createThemeNegotiator($negotiators)
      ->determineActiveTheme($route_match);
    $this->assertEquals('example_test', $theme);
  }
  
  /**
   * Tests determining with two negotiators checking the priority.
   *
   * @see \Drupal\Core\Theme\ThemeNegotiator::determineActiveTheme()
   */
  public function testDetermineActiveThemeWithPriority() {
    $negotiators = [];
    $negotiator = $this->createMock('Drupal\\Core\\Theme\\ThemeNegotiatorInterface');
    $negotiator->expects($this->once())
      ->method('determineActiveTheme')
      ->willReturn('example_test');
    $negotiator->expects($this->once())
      ->method('applies')
      ->willReturn(TRUE);
    $negotiators['test_negotiator_1'] = $negotiator;
    $negotiator = $this->createMock('Drupal\\Core\\Theme\\ThemeNegotiatorInterface');
    $negotiator->expects($this->never())
      ->method('determineActiveTheme');
    $negotiator->expects($this->never())
      ->method('applies');
    $negotiators['test_negotiator_2'] = $negotiator;
    foreach ($negotiators as $id => $negotiator) {
      $this->container
        ->set($id, $negotiator);
    }
    $this->themeAccessCheck
      ->expects($this->any())
      ->method('checkAccess')
      ->willReturn(TRUE);
    $route_match = new RouteMatch('test_route', new Route('/test-route'), [], []);
    $theme = $this->createThemeNegotiator(array_keys($negotiators))
      ->determineActiveTheme($route_match);
    $this->assertEquals('example_test', $theme);
  }
  
  /**
   * Tests determining with two negotiators of which just one returns access.
   *
   * @see \Drupal\Core\Theme\ThemeNegotiator::determineActiveTheme()
   */
  public function testDetermineActiveThemeWithAccessCheck() {
    $negotiators = [];
    $negotiator = $this->createMock('Drupal\\Core\\Theme\\ThemeNegotiatorInterface');
    $negotiator->expects($this->once())
      ->method('determineActiveTheme')
      ->willReturn('example_test');
    $negotiator->expects($this->once())
      ->method('applies')
      ->willReturn(TRUE);
    $negotiators['test_negotiator_1'] = $negotiator;
    $negotiator = $this->createMock('Drupal\\Core\\Theme\\ThemeNegotiatorInterface');
    $negotiator->expects($this->once())
      ->method('determineActiveTheme')
      ->willReturn('example_test2');
    $negotiator->expects($this->once())
      ->method('applies')
      ->willReturn(TRUE);
    $negotiators['test_negotiator_2'] = $negotiator;
    foreach ($negotiators as $id => $negotiator) {
      $this->container
        ->set($id, $negotiator);
    }
    $this->themeAccessCheck
      ->expects($this->exactly(2))
      ->method('checkAccess')
      ->willReturnMap([
      [
        'example_test',
        FALSE,
      ],
      [
        'example_test2',
        TRUE,
      ],
    ]);
    $route_match = new RouteMatch('test_route', new Route('/test-route'), [], []);
    $theme = $this->createThemeNegotiator(array_keys($negotiators))
      ->determineActiveTheme($route_match);
    $this->assertEquals('example_test2', $theme);
  }
  
  /**
   * Tests determining with two negotiators of which one does not apply.
   *
   * @see \Drupal\Core\Theme\ThemeNegotiatorInterface
   */
  public function testDetermineActiveThemeWithNotApplyingNegotiator() {
    $negotiators = [];
    $negotiator = $this->createMock('Drupal\\Core\\Theme\\ThemeNegotiatorInterface');
    $negotiator->expects($this->never())
      ->method('determineActiveTheme');
    $negotiator->expects($this->once())
      ->method('applies')
      ->willReturn(FALSE);
    $negotiators['test_negotiator_1'] = $negotiator;
    $negotiator = $this->createMock('Drupal\\Core\\Theme\\ThemeNegotiatorInterface');
    $negotiator->expects($this->once())
      ->method('determineActiveTheme')
      ->willReturn('example_test2');
    $negotiator->expects($this->once())
      ->method('applies')
      ->willReturn(TRUE);
    $negotiators['test_negotiator_2'] = $negotiator;
    foreach ($negotiators as $id => $negotiator) {
      $this->container
        ->set($id, $negotiator);
    }
    $this->themeAccessCheck
      ->expects($this->any())
      ->method('checkAccess')
      ->willReturn(TRUE);
    $route_match = new RouteMatch('test_route', new Route('/test-route'), [], []);
    $theme = $this->createThemeNegotiator(array_keys($negotiators))
      ->determineActiveTheme($route_match);
    $this->assertEquals('example_test2', $theme);
  }
  
  /**
   * Creates a new theme negotiator instance.
   *
   * @param array $negotiators
   *   An array of negotiator IDs.
   *
   * @return \Drupal\Core\Theme\ThemeNegotiator
   */
  protected function createThemeNegotiator(array $negotiators) {
    $resolver = new ClassResolver();
    $resolver->setContainer($this->container);
    $theme_negotiator = new ThemeNegotiator($this->themeAccessCheck, $resolver, $negotiators);
    return $theme_negotiator;
  }

}