class EntityFieldDefaultValueTest

class EntityFieldDefaultValueTest extends EntityKernelTestBase {
    
    /**
     * The UUID object to be used for generating UUIDs.
     *
     * @var \Drupal\Component\Uuid\UuidInterface
     */
    protected $uuid;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        // Initiate the generator object.
        $this->uuid = $this->container
            ->get('uuid');
    }
    
    /**
     * Tests default values on entities and fields.
     */
    public function testDefaultValues() {
        // All entity variations have to have the same results.
        foreach (entity_test_entity_types() as $entity_type) {
            $this->assertDefaultValues($entity_type);
        }
    }
    
    /**
     * Executes a test set for a defined entity type.
     *
     * @param string $entity_type_id
     *   The entity type to run the tests with.
     *
     * @internal
     */
    protected function assertDefaultValues(string $entity_type_id) : void {
        $entity = $this->container
            ->get('entity_type.manager')
            ->getStorage($entity_type_id)
            ->create();
        $definition = $this->entityTypeManager
            ->getDefinition($entity_type_id);
        $langcode_key = $definition->getKey('langcode');
        $this->assertEquals('en', $entity->{$langcode_key}->value, new FormattableMarkup('%entity_type: Default language', [
            '%entity_type' => $entity_type_id,
        ]));
        $this->assertTrue(Uuid::isValid($entity->uuid->value), new FormattableMarkup('%entity_type: Default UUID', [
            '%entity_type' => $entity_type_id,
        ]));
        $this->assertEquals([], $entity->name
            ->getValue(), 'Field has one empty value by default.');
    }
    
    /**
     * Tests custom default value callbacks.
     */
    public function testDefaultValueCallback() {
        $entity = $this->entityTypeManager
            ->getStorage('entity_test_default_value')
            ->create();
        // The description field has a default value callback for testing, see
        // entity_test_field_default_value().
        $string = 'description_' . $entity->language()
            ->getId();
        $expected = [
            [
                'shape' => "shape:0:{$string}",
                'color' => "color:0:{$string}",
            ],
            [
                'shape' => "shape:1:{$string}",
                'color' => "color:1:{$string}",
            ],
        ];
        $this->assertEquals($expected, $entity->description
            ->getValue());
    }

}