class EntityDisplayModeBaseUnitTest

class EntityDisplayModeBaseUnitTest extends UnitTestCase {

  /**
   * The entity under test.
   *
   * @var \Drupal\Core\Entity\EntityDisplayModeBase|\PHPUnit\Framework\MockObject\MockObject
   */
  protected $entity;

  /**
   * The entity type used for testing.
   *
   * @var \Drupal\Core\Entity\EntityTypeInterface|\PHPUnit\Framework\MockObject\MockObject
   */
  protected $entityInfo;

  /**
   * The entity type manager used for testing.
   *
   * @var \Drupal\Core\Entity\EntityTypeManagerInterface|\PHPUnit\Framework\MockObject\MockObject
   */
  protected $entityTypeManager;

  /**
   * The ID of the type of the entity under test.
   *
   * @var string
   */
  protected $entityType;

  /**
   * The UUID generator used for testing.
   *
   * @var \Drupal\Component\Uuid\UuidInterface|\PHPUnit\Framework\MockObject\MockObject
   */
  protected $uuid;

  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    $this->entityType = $this
      ->randomMachineName();
    $this->entityInfo = $this
      ->createMock('\\Drupal\\Core\\Entity\\EntityTypeInterface');
    $this->entityInfo
      ->expects($this
      ->any())
      ->method('getProvider')
      ->willReturn('entity');
    $this->entityTypeManager = $this
      ->createMock(EntityTypeManagerInterface::class);
    $this->uuid = $this
      ->createMock('\\Drupal\\Component\\Uuid\\UuidInterface');
    $container = new ContainerBuilder();
    $container
      ->set('entity_type.manager', $this->entityTypeManager);
    $container
      ->set('uuid', $this->uuid);
    \Drupal::setContainer($container);
  }

  /**
   * @covers ::calculateDependencies
   */
  public function testCalculateDependencies() {
    $target_entity_type_id = $this
      ->randomMachineName(16);
    $target_entity_type = $this
      ->createMock('\\Drupal\\Core\\Entity\\EntityTypeInterface');
    $target_entity_type
      ->expects($this
      ->any())
      ->method('getProvider')
      ->willReturn('test_module');
    $values = [
      'targetEntityType' => $target_entity_type_id,
    ];
    $this->entityTypeManager
      ->expects($this
      ->exactly(2))
      ->method('getDefinition')
      ->willReturnMap([
      [
        $target_entity_type_id,
        TRUE,
        $target_entity_type,
      ],
      [
        $this->entityType,
        TRUE,
        $this->entityInfo,
      ],
    ]);
    $this->entity = new EntityDisplayModeBaseTestableClass($values, $this->entityType);
    $dependencies = $this->entity
      ->calculateDependencies()
      ->getDependencies();
    $this
      ->assertContains('test_module', $dependencies['module']);
  }

  /**
   * @covers ::setTargetType
   */
  public function testSetTargetType() {

    // Generate mock.
    $mock = $this
      ->getMockBuilder('Drupal\\Core\\Entity\\EntityDisplayModeBase')
      ->onlyMethods([])
      ->setConstructorArgs([
      [
        'something' => 'nothing',
      ],
      'test_type',
    ])
      ->getMock();

    // Some test values.
    $bad_target = 'uninitialized';
    $target = 'test_target_type';

    // Gain access to the protected property.
    $property = new \ReflectionProperty($mock, 'targetEntityType');

    // Set the property to a known state.
    $property
      ->setValue($mock, $bad_target);

    // Set the target type.
    $mock
      ->setTargetType($target);

    // Test the outcome.
    $this
      ->assertNotEquals($bad_target, $property
      ->getValue($mock));
    $this
      ->assertEquals($target, $property
      ->getValue($mock));
  }

  /**
   * @covers ::getTargetType
   */
  public function testGetTargetType() {

    // Generate mock.
    $mock = $this
      ->getMockBuilder('Drupal\\Core\\Entity\\EntityDisplayModeBase')
      ->onlyMethods([])
      ->setConstructorArgs([
      [
        'something' => 'nothing',
      ],
      'test_type',
    ])
      ->getMock();

    // A test value.
    $target = 'test_target_type';

    // Gain access to the protected property.
    $property = new \ReflectionProperty($mock, 'targetEntityType');

    // Set the property to a known state.
    $property
      ->setValue($mock, $target);

    // Get the target type.
    $value = $mock
      ->getTargetType($target);

    // Test the outcome.
    $this
      ->assertEquals($value, $property
      ->getValue($mock));
  }

}