class EntityViewsDataTest

class EntityViewsDataTest extends KernelTestBase {
    
    /**
     * The entity type manager.
     *
     * @var \Drupal\Core\Entity\EntityTypeManagerInterface
     */
    protected $entityTypeManager;
    
    /**
     * The base entity type definition, which some tests modify.
     *
     * Uses a custom class which allows changing entity keys.
     *
     * @var \Drupal\Tests\views\Kernel\Entity\TestEntityType
     */
    protected $baseEntityType;
    
    /**
     * The common base fields for test entity types.
     *
     * @var \Drupal\Core\Field\BaseFieldDefinition[]
     */
    protected $commonBaseFields;
    
    /**
     * Modules to enable.
     *
     * @var array
     */
    protected static $modules = [
        'user',
        'system',
        'field',
        'text',
        'filter',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->entityTypeManager = $this->container
            ->get('entity_type.manager');
        // A common entity type definition. Tests may change this prior to passing
        // it to setUpEntityType().
        $this->baseEntityType = new TestEntityType([
            // A normal entity type would have its class picked up during discovery,
            // but as we're mocking this without an annotation we have to specify it.
'class' => ViewsTestEntity::class,
            'base_table' => 'entity_test',
            'id' => 'entity_test',
            'label' => 'Entity test',
            'entity_keys' => [
                'uuid' => 'uuid',
                'id' => 'id',
                'langcode' => 'langcode',
                'bundle' => 'type',
                'revision' => 'revision_id',
            ],
            'handlers' => [
                'views_data' => EntityViewsData::class,
            ],
            'provider' => 'entity_test',
            'list_cache_contexts' => [
                'entity_test_list_cache_context',
            ],
        ]);
        // Base fields for the test entity types.
        $this->commonBaseFields['name'] = BaseFieldDefinition::create('string')->setLabel(t('Name'))
            ->setDescription(t('The name of the test entity.'))
            ->setTranslatable(TRUE)
            ->setSetting('max_length', 32);
        $this->commonBaseFields['created'] = BaseFieldDefinition::create('created')->setLabel(t('Authored on'))
            ->setDescription(t('Time the entity was created'))
            ->setTranslatable(TRUE);
        $this->commonBaseFields['user_id'] = BaseFieldDefinition::create('entity_reference')->setLabel(t('User ID'))
            ->setDescription(t('The ID of the associated user.'))
            ->setSetting('target_type', 'user')
            ->setSetting('handler', 'default')
            ->setDefaultValue([
            0 => [
                'target_id' => 1,
            ],
        ])
            ->setTranslatable(TRUE);
        // Add a description field. This example comes from the taxonomy Term
        // entity.
        $this->commonBaseFields['description'] = BaseFieldDefinition::create('text_long')->setLabel('Description')
            ->setDescription('A description of the term.')
            ->setTranslatable(TRUE);
        // Add a URL field; this example is from the Comment entity.
        $this->commonBaseFields['homepage'] = BaseFieldDefinition::create('uri')->setLabel('Homepage')
            ->setDescription("The comment author's home page address.")
            ->setTranslatable(TRUE)
            ->setSetting('max_length', 255);
        // A base field with cardinality > 1
        $this->commonBaseFields['string'] = BaseFieldDefinition::create('string')->setLabel('Strong')
            ->setTranslatable(TRUE)
            ->setCardinality(2);
        // Set up the basic 'entity_test' entity type. This is used by several
        // tests; others customize it and the base fields.
        $this->setUpEntityType($this->baseEntityType, $this->commonBaseFields);
    }
    
    /**
     * Mocks an entity type and its base fields.
     *
     * This works by:
     * - inserting the entity type definition into the entity type manager's cache
     * - setting the base fields on the ViewsTestEntity class as a static property
     *   for its baseFieldsDefinitions() method to use.
     *
     * @param \Drupal\Core\Entity\EntityTypeInterface $definition
     *   An entity type definition to add to the entity type manager.
     * @param \Drupal\Core\Field\BaseFieldDefinition[] $base_fields
     *   An array of base field definitions
     */
    protected function setUpEntityType(EntityTypeInterface $definition, array $base_fields = []) {
        // Replace the cache backend in the entity type manager so it returns
        // our test entity type in addition to the existing ones.
        $definitions = $this->entityTypeManager
            ->getDefinitions();
        $definitions[$definition->id()] = $definition;
        $cache_backend = $this->prophesize(CacheBackendInterface::class);
        $cache_data = new \StdClass();
        $cache_data->data = $definitions;
        $cache_backend->get('entity_type')
            ->willReturn($cache_data);
        $this->entityTypeManager
            ->setCacheBackend($cache_backend->reveal(), 'entity_type', [
            'entity_types',
        ]);
        $this->entityTypeManager
            ->clearCachedDefinitions();
        if ($base_fields) {
            ViewsTestEntity::setMockedBaseFieldDefinitions($definition->id(), $base_fields);
        }
    }
    
    /**
     * Tests base tables.
     */
    public function testBaseTables() {
        $data = $this->entityTypeManager
            ->getHandler('entity_test', 'views_data')
            ->getViewsData();
        $this->assertEquals('entity_test', $data['entity_test']['table']['entity type']);
        $this->assertEquals(FALSE, $data['entity_test']['table']['entity revision']);
        $this->assertEquals('Entity test', $data['entity_test']['table']['group']);
        $this->assertEquals('entity_test', $data['entity_test']['table']['provider']);
        $this->assertEquals('id', $data['entity_test']['table']['base']['field']);
        $this->assertEquals([
            'entity_test_list_cache_context',
        ], $data['entity_test']['table']['base']['cache_contexts']);
        $this->assertEquals('Entity test', $data['entity_test']['table']['base']['title']);
        // TODO: change these to assertArrayNotHasKey().
        $this->assertFalse(isset($data['entity_test']['table']['defaults']));
        $this->assertFalse(isset($data['entity_test_mul_property_data']));
        $this->assertFalse(isset($data['revision_table']));
        $this->assertFalse(isset($data['revision_data_table']));
    }
    
    /**
     * Tests data_table support.
     */
    public function testDataTable() {
        $entity_type = $this->baseEntityType
            ->set('data_table', 'entity_test_mul_property_data')
            ->set('id', 'entity_test_mul')
            ->set('translatable', TRUE)
            ->setKey('label', 'label');
        $this->setUpEntityType($entity_type);
        // Tests the join definition between the base and the data table.
        $data = $this->entityTypeManager
            ->getHandler('entity_test_mul', 'views_data')
            ->getViewsData();
        // TODO: change the base table in the entity type definition to match the
        // changed entity ID.
        $base_views_data = $data['entity_test'];
        // Ensure that the base table is set to the data table.
        $this->assertEquals('id', $data['entity_test_mul_property_data']['table']['base']['field']);
        $this->assertEquals('Entity test', $data['entity_test_mul_property_data']['table']['base']['title']);
        $this->assertFalse(isset($data['entity_test']['table']['base']));
        $this->assertEquals('entity_test_mul', $data['entity_test_mul_property_data']['table']['entity type']);
        $this->assertEquals(FALSE, $data['entity_test_mul_property_data']['table']['entity revision']);
        $this->assertEquals('Entity test', $data['entity_test_mul_property_data']['table']['group']);
        $this->assertEquals('entity_test', $data['entity_test']['table']['provider']);
        $this->assertEquals([
            'field' => 'label',
            'table' => 'entity_test_mul_property_data',
        ], $data['entity_test_mul_property_data']['table']['base']['defaults']);
        // Ensure the join information is set up properly.
        $this->assertCount(1, $base_views_data['table']['join']);
        $this->assertEquals([
            'entity_test_mul_property_data' => [
                'left_field' => 'id',
                'field' => 'id',
                'type' => 'INNER',
            ],
        ], $base_views_data['table']['join']);
        $this->assertFalse(isset($data['revision_table']));
        $this->assertFalse(isset($data['revision_data_table']));
    }
    
    /**
     * Tests revision table without data table support.
     */
    public function testRevisionTableWithoutDataTable() {
        $entity_type = $this->baseEntityType
            ->set('revision_table', 'entity_test_mulrev_revision')
            ->set('revision_data_table', NULL)
            ->set('id', 'entity_test_mulrev')
            ->setKey('revision', 'revision_id');
        $this->setUpEntityType($entity_type);
        $data = $this->entityTypeManager
            ->getHandler('entity_test_mulrev', 'views_data')
            ->getViewsData();
        $this->assertEquals('Entity test revisions', $data['entity_test_mulrev_revision']['table']['base']['title']);
        $this->assertEquals('revision_id', $data['entity_test_mulrev_revision']['table']['base']['field']);
        $this->assertEquals(FALSE, $data['entity_test']['table']['entity revision']);
        $this->assertEquals('entity_test_mulrev', $data['entity_test_mulrev_revision']['table']['entity type']);
        $this->assertEquals(TRUE, $data['entity_test_mulrev_revision']['table']['entity revision']);
        $this->assertEquals('entity_test_mulrev', $data['entity_test_mulrev_revision']['table']['entity type']);
        $this->assertEquals(TRUE, $data['entity_test_mulrev_revision']['table']['entity revision']);
        $this->assertEquals('Entity test revision', $data['entity_test_mulrev_revision']['table']['group']);
        $this->assertEquals('entity_test', $data['entity_test']['table']['provider']);
        // Ensure the join information is set up properly.
        // Tests the join definition between the base and the revision table.
        $revision_data = $data['entity_test_mulrev_revision'];
        $this->assertCount(1, $revision_data['table']['join']);
        $this->assertEquals([
            'entity_test' => [
                'left_field' => 'revision_id',
                'field' => 'revision_id',
                'type' => 'INNER',
            ],
        ], $revision_data['table']['join']);
        $this->assertFalse(isset($data['data_table']));
        $this->assertEquals('entity_test', $revision_data['id']['relationship']['base']);
        $this->assertEquals('id', $revision_data['id']['relationship']['base field']);
        $this->assertEquals('entity_test', $revision_data['revision_id']['relationship']['base']);
        $this->assertEquals('revision_id', $revision_data['revision_id']['relationship']['base field']);
    }
    
    /**
     * Tests revision table with data table support.
     */
    public function testRevisionTableWithRevisionDataTableAndDataTable() {
        $entity_type = $this->baseEntityType
            ->set('data_table', 'entity_test_mul_property_data')
            ->set('revision_table', 'entity_test_mulrev_revision')
            ->set('revision_data_table', 'entity_test_mulrev_property_revision')
            ->set('id', 'entity_test_mulrev')
            ->set('translatable', TRUE)
            ->setKey('revision', 'revision_id');
        $this->setUpEntityType($entity_type);
        $data = $this->entityTypeManager
            ->getHandler('entity_test_mulrev', 'views_data')
            ->getViewsData();
        $this->assertEquals('Entity test revisions', $data['entity_test_mulrev_property_revision']['table']['base']['title']);
        $this->assertEquals('revision_id', $data['entity_test_mulrev_property_revision']['table']['base']['field']);
        $this->assertFalse(isset($data['entity_test_mulrev_revision']['table']['base']));
        $this->assertEquals('entity_test_mulrev', $data['entity_test_mulrev_property_revision']['table']['entity type']);
        $this->assertEquals('Entity test revision', $data['entity_test_mulrev_revision']['table']['group']);
        $this->assertEquals('entity_test', $data['entity_test']['table']['provider']);
        // Ensure the join information is set up properly.
        // Tests the join definition between the base and the revision table.
        $revision_field_data = $data['entity_test_mulrev_property_revision'];
        $this->assertCount(1, $revision_field_data['table']['join']);
        $this->assertEquals([
            'entity_test_mul_property_data' => [
                'left_field' => 'revision_id',
                'field' => 'revision_id',
                'type' => 'INNER',
            ],
        ], $revision_field_data['table']['join']);
        $revision_base_data = $data['entity_test_mulrev_revision'];
        $this->assertCount(2, $revision_base_data['table']['join']);
        $this->assertEquals([
            'entity_test_mulrev_property_revision' => [
                'left_field' => 'revision_id',
                'field' => 'revision_id',
                'type' => 'INNER',
            ],
            'entity_test_mul_property_data' => [
                'left_field' => 'revision_id',
                'field' => 'revision_id',
            ],
        ], $revision_base_data['table']['join']);
        $this->assertFalse(isset($data['data_table']));
        $this->assertEquals('entity_test_mul_property_data', $revision_field_data['id']['relationship']['base']);
        $this->assertEquals('id', $revision_field_data['id']['relationship']['base field']);
        $this->assertEquals('entity_test_mul_property_data', $revision_field_data['revision_id']['relationship']['base']);
        $this->assertEquals('revision_id', $revision_field_data['revision_id']['relationship']['base field']);
    }
    
    /**
     * Tests revision table with data table support.
     */
    public function testRevisionTableWithRevisionDataTable() {
        $entity_type = $this->baseEntityType
            ->set('revision_table', 'entity_test_mulrev_revision')
            ->set('revision_data_table', 'entity_test_mulrev_property_revision')
            ->set('id', 'entity_test_mulrev')
            ->set('translatable', TRUE)
            ->setKey('revision', 'revision_id');
        $this->setUpEntityType($entity_type);
        $data = $this->entityTypeManager
            ->getHandler('entity_test_mulrev', 'views_data')
            ->getViewsData();
        $this->assertEquals('Entity test revisions', $data['entity_test_mulrev_property_revision']['table']['base']['title']);
        $this->assertEquals('revision_id', $data['entity_test_mulrev_property_revision']['table']['base']['field']);
        $this->assertFalse(isset($data['entity_test_mulrev_revision']['table']['base']));
        $this->assertEquals('entity_test_mulrev', $data['entity_test_mulrev_property_revision']['table']['entity type']);
        $this->assertEquals('Entity test revision', $data['entity_test_mulrev_revision']['table']['group']);
        $this->assertEquals('entity_test', $data['entity_test']['table']['provider']);
        // Ensure the join information is set up properly.
        // Tests the join definition between the base and the revision table.
        $revision_field_data = $data['entity_test_mulrev_property_revision'];
        $this->assertCount(1, $revision_field_data['table']['join']);
        $this->assertEquals([
            'entity_test_mulrev_field_data' => [
                'left_field' => 'revision_id',
                'field' => 'revision_id',
                'type' => 'INNER',
            ],
        ], $revision_field_data['table']['join']);
        $revision_base_data = $data['entity_test_mulrev_revision'];
        $this->assertCount(2, $revision_base_data['table']['join']);
        $this->assertEquals([
            'entity_test_mulrev_property_revision' => [
                'left_field' => 'revision_id',
                'field' => 'revision_id',
                'type' => 'INNER',
            ],
            'entity_test_mulrev_field_data' => [
                'left_field' => 'revision_id',
                'field' => 'revision_id',
            ],
        ], $revision_base_data['table']['join']);
        $this->assertFalse(isset($data['data_table']));
        $this->assertEquals('entity_test_mulrev_field_data', $revision_field_data['id']['relationship']['base']);
        $this->assertEquals('id', $revision_field_data['id']['relationship']['base field']);
        $this->assertEquals('entity_test_mulrev_field_data', $revision_field_data['revision_id']['relationship']['base']);
        $this->assertEquals('revision_id', $revision_field_data['revision_id']['relationship']['base field']);
    }
    
    /**
     * Tests fields on the base table.
     */
    public function testBaseTableFields() {
        $data = $this->entityTypeManager
            ->getHandler('entity_test', 'views_data')
            ->getViewsData();
        $this->assertNumericField($data['entity_test']['id']);
        $this->assertViewsDataField($data['entity_test']['id'], 'id');
        $this->assertUuidField($data['entity_test']['uuid']);
        $this->assertViewsDataField($data['entity_test']['uuid'], 'uuid');
        $this->assertStringField($data['entity_test']['type']);
        $this->assertEquals('type', $data['entity_test']['type']['entity field']);
        $this->assertLanguageField($data['entity_test']['langcode']);
        $this->assertViewsDataField($data['entity_test']['langcode'], 'langcode');
        $this->assertEquals('Original language', $data['entity_test']['langcode']['title']);
        $this->assertStringField($data['entity_test']['name']);
        $this->assertViewsDataField($data['entity_test']['name'], 'name');
        $this->assertLongTextField($data['entity_test'], 'description');
        $this->assertViewsDataField($data['entity_test']['description__value'], 'description');
        $this->assertViewsDataField($data['entity_test']['description__format'], 'description');
        $this->assertUriField($data['entity_test']['homepage']);
        $this->assertViewsDataField($data['entity_test']['homepage'], 'homepage');
        $this->assertEntityReferenceField($data['entity_test']['user_id']);
        $this->assertViewsDataField($data['entity_test']['user_id'], 'user_id');
        $relationship = $data['entity_test']['user_id']['relationship'];
        $this->assertEquals('users_field_data', $relationship['base']);
        $this->assertEquals('uid', $relationship['base field']);
        // The string field name should be used as the 'entity field' but the actual
        // field should reflect what the column mapping is using for multi-value
        // base fields NOT just the field name. The actual column name returned from
        // mappings in the test mocks is 'value'.
        $this->assertStringField($data['entity_test__string']['string_value']);
        $this->assertViewsDataField($data['entity_test__string']['string_value'], 'string');
        $this->assertEquals([
            'left_field' => 'id',
            'field' => 'entity_id',
            'extra' => [
                [
                    'field' => 'deleted',
                    'value' => 0,
                    'numeric' => TRUE,
                ],
            ],
        ], $data['entity_test__string']['table']['join']['entity_test']);
    }
    
    /**
     * Tests fields on the data table.
     */
    public function testDataTableFields() {
        $entity_test_type = new ConfigEntityType([
            'class' => ConfigEntityBase::class,
            'id' => 'entity_test_bundle',
            'entity_keys' => [
                'id' => 'type',
                'label' => 'name',
            ],
        ]);
        $this->setUpEntityType($entity_test_type);
        $entity_type = $this->baseEntityType
            ->set('data_table', 'entity_test_mul_property_data')
            ->set('base_table', 'entity_test_mul')
            ->set('translatable', TRUE)
            ->set('id', 'entity_test_mul')
            ->set('bundle_entity_type', 'entity_test_bundle')
            ->setKey('bundle', 'type');
        $base_field_definitions = $this->commonBaseFields;
        $base_field_definitions['type'] = BaseFieldDefinition::create('entity_reference')->setLabel('entity test type')
            ->setSetting('target_type', 'entity_test_bundle');
        $this->setUpEntityType($entity_type, $base_field_definitions);
        $data = $this->entityTypeManager
            ->getHandler('entity_test_mul', 'views_data')
            ->getViewsData();
        // Check the base fields.
        $this->assertFalse(isset($data['entity_test_mul']['id']));
        $this->assertFalse(isset($data['entity_test_mul']['type']));
        $this->assertUuidField($data['entity_test_mul']['uuid']);
        $this->assertViewsDataField($data['entity_test_mul']['uuid'], 'uuid');
        $this->assertFalse(isset($data['entity_test_mul']['type']['relationship']));
        // Also ensure that field_data only fields don't appear on the base table.
        $this->assertFalse(isset($data['entity_test_mul']['name']));
        $this->assertFalse(isset($data['entity_test_mul']['description']));
        $this->assertFalse(isset($data['entity_test_mul']['description__value']));
        $this->assertFalse(isset($data['entity_test_mul']['description__format']));
        $this->assertFalse(isset($data['entity_test_mul']['user_id']));
        $this->assertFalse(isset($data['entity_test_mul']['homepage']));
        // Check the data fields.
        $this->assertNumericField($data['entity_test_mul_property_data']['id']);
        $this->assertViewsDataField($data['entity_test_mul_property_data']['id'], 'id');
        $this->assertBundleField($data['entity_test_mul_property_data']['type']);
        $this->assertViewsDataField($data['entity_test_mul_property_data']['type'], 'type');
        $this->assertLanguageField($data['entity_test_mul_property_data']['langcode']);
        $this->assertViewsDataField($data['entity_test_mul_property_data']['langcode'], 'langcode');
        $this->assertEquals('Translation language', $data['entity_test_mul_property_data']['langcode']['title']);
        $this->assertStringField($data['entity_test_mul_property_data']['name']);
        $this->assertViewsDataField($data['entity_test_mul_property_data']['name'], 'name');
        $this->assertLongTextField($data['entity_test_mul_property_data'], 'description');
        $this->assertViewsDataField($data['entity_test_mul_property_data']['description__value'], 'description');
        $this->assertViewsDataField($data['entity_test_mul_property_data']['description__format'], 'description');
        $this->assertUriField($data['entity_test_mul_property_data']['homepage']);
        $this->assertViewsDataField($data['entity_test_mul_property_data']['homepage'], 'homepage');
        $this->assertEntityReferenceField($data['entity_test_mul_property_data']['user_id']);
        $this->assertViewsDataField($data['entity_test_mul_property_data']['user_id'], 'user_id');
        $relationship = $data['entity_test_mul_property_data']['user_id']['relationship'];
        $this->assertEquals('users_field_data', $relationship['base']);
        $this->assertEquals('uid', $relationship['base field']);
        $this->assertStringField($data['entity_test_mul__string']['string_value']);
        $this->assertViewsDataField($data['entity_test_mul__string']['string_value'], 'string');
        $this->assertEquals([
            'left_field' => 'id',
            'field' => 'entity_id',
            'extra' => [
                [
                    'field' => 'deleted',
                    'value' => 0,
                    'numeric' => TRUE,
                ],
            ],
        ], $data['entity_test_mul__string']['table']['join']['entity_test_mul_property_data']);
    }
    
    /**
     * Tests fields on the revision table.
     */
    public function testRevisionTableFields() {
        $entity_type = $this->baseEntityType
            ->set('id', 'entity_test_mulrev')
            ->set('base_table', 'entity_test_mulrev')
            ->set('revision_table', 'entity_test_mulrev_revision')
            ->set('data_table', 'entity_test_mulrev_property_data')
            ->set('revision_data_table', 'entity_test_mulrev_property_revision')
            ->set('translatable', TRUE);
        $base_field_definitions = $this->commonBaseFields;
        $base_field_definitions['name']->setRevisionable(TRUE);
        $base_field_definitions['description']->setRevisionable(TRUE);
        $base_field_definitions['homepage']->setRevisionable(TRUE);
        $base_field_definitions['user_id']->setRevisionable(TRUE);
        $base_field_definitions['non_rev_field'] = BaseFieldDefinition::create('string')->setLabel(t('Non Revisionable Field'))
            ->setDescription(t('A non-revisionable test field.'))
            ->setRevisionable(FALSE)
            ->setTranslatable(TRUE)
            ->setCardinality(1)
            ->setReadOnly(TRUE);
        $base_field_definitions['non_mul_field'] = BaseFieldDefinition::create('string')->setLabel(t('Non translatable'))
            ->setDescription(t('A non-translatable string field'))
            ->setRevisionable(TRUE);
        $this->setUpEntityType($entity_type, $base_field_definitions);
        $data = $this->entityTypeManager
            ->getHandler('entity_test_mulrev', 'views_data')
            ->getViewsData();
        // Check the base fields.
        $this->assertFalse(isset($data['entity_test_mulrev']['id']));
        $this->assertFalse(isset($data['entity_test_mulrev']['type']));
        $this->assertFalse(isset($data['entity_test_mulrev']['revision_id']));
        $this->assertUuidField($data['entity_test_mulrev']['uuid']);
        $this->assertViewsDataField($data['entity_test_mulrev']['uuid'], 'uuid');
        // Also ensure that field_data only fields don't appear on the base table.
        $this->assertFalse(isset($data['entity_test_mulrev']['name']));
        $this->assertFalse(isset($data['entity_test_mul']['description']));
        $this->assertFalse(isset($data['entity_test_mul']['description__value']));
        $this->assertFalse(isset($data['entity_test_mul']['description__format']));
        $this->assertFalse(isset($data['entity_test_mul']['homepage']));
        // $this->assertFalse(isset($data['entity_test_mulrev']['langcode']));
        $this->assertFalse(isset($data['entity_test_mulrev']['user_id']));
        // Check the revision fields. The revision ID should only appear in the data
        // table.
        $this->assertFalse(isset($data['entity_test_mulrev_revision']['revision_id']));
        // Also ensure that field_data only fields don't appear on the revision table.
        $this->assertFalse(isset($data['entity_test_mulrev_revision']['id']));
        $this->assertFalse(isset($data['entity_test_mulrev_revision']['name']));
        $this->assertFalse(isset($data['entity_test_mulrev_revision']['description']));
        $this->assertFalse(isset($data['entity_test_mulrev_revision']['description__value']));
        $this->assertFalse(isset($data['entity_test_mulrev_revision']['description__format']));
        $this->assertFalse(isset($data['entity_test_mulrev_revision']['homepage']));
        $this->assertFalse(isset($data['entity_test_mulrev_revision']['user_id']));
        // Check the data fields.
        $this->assertNumericField($data['entity_test_mulrev_property_data']['id']);
        $this->assertViewsDataField($data['entity_test_mulrev_property_data']['id'], 'id');
        $this->assertNumericField($data['entity_test_mulrev_property_data']['revision_id']);
        $this->assertViewsDataField($data['entity_test_mulrev_property_data']['revision_id'], 'revision_id');
        $this->assertLanguageField($data['entity_test_mulrev_property_data']['langcode']);
        $this->assertViewsDataField($data['entity_test_mulrev_property_data']['langcode'], 'langcode');
        $this->assertStringField($data['entity_test_mulrev_property_data']['name']);
        $this->assertViewsDataField($data['entity_test_mulrev_property_data']['name'], 'name');
        $this->assertLongTextField($data['entity_test_mulrev_property_data'], 'description');
        $this->assertViewsDataField($data['entity_test_mulrev_property_data']['description__value'], 'description');
        $this->assertViewsDataField($data['entity_test_mulrev_property_data']['description__format'], 'description');
        $this->assertUriField($data['entity_test_mulrev_property_data']['homepage']);
        $this->assertViewsDataField($data['entity_test_mulrev_property_data']['homepage'], 'homepage');
        $this->assertEntityReferenceField($data['entity_test_mulrev_property_data']['user_id']);
        $this->assertViewsDataField($data['entity_test_mulrev_property_data']['user_id'], 'user_id');
        $relationship = $data['entity_test_mulrev_property_data']['user_id']['relationship'];
        $this->assertEquals('users_field_data', $relationship['base']);
        $this->assertEquals('uid', $relationship['base field']);
        // Check the property data fields.
        $this->assertNumericField($data['entity_test_mulrev_property_revision']['id']);
        $this->assertViewsDataField($data['entity_test_mulrev_property_revision']['id'], 'id');
        $this->assertEquals('entity_test_mulrev_property_data', $data['entity_test_mulrev_property_revision']['id']['relationship']['base']);
        $this->assertEquals('id', $data['entity_test_mulrev_property_revision']['id']['relationship']['base field']);
        $this->assertEquals('entity_test_mulrev_property_data', $data['entity_test_mulrev_property_revision']['revision_id']['relationship']['base']);
        $this->assertEquals('revision_id', $data['entity_test_mulrev_property_revision']['revision_id']['relationship']['base field']);
        $this->assertLanguageField($data['entity_test_mulrev_property_revision']['langcode']);
        $this->assertViewsDataField($data['entity_test_mulrev_property_revision']['langcode'], 'langcode');
        $this->assertEquals('Translation language', $data['entity_test_mulrev_property_revision']['langcode']['title']);
        $this->assertStringField($data['entity_test_mulrev_property_revision']['name']);
        $this->assertViewsDataField($data['entity_test_mulrev_property_revision']['name'], 'name');
        $this->assertLongTextField($data['entity_test_mulrev_property_revision'], 'description');
        $this->assertViewsDataField($data['entity_test_mulrev_property_revision']['description__value'], 'description');
        $this->assertViewsDataField($data['entity_test_mulrev_property_revision']['description__format'], 'description');
        $this->assertUriField($data['entity_test_mulrev_property_revision']['homepage']);
        $this->assertViewsDataField($data['entity_test_mulrev_property_revision']['homepage'], 'homepage');
        $this->assertEntityReferenceField($data['entity_test_mulrev_property_revision']['user_id']);
        $this->assertViewsDataField($data['entity_test_mulrev_property_revision']['user_id'], 'user_id');
        $relationship = $data['entity_test_mulrev_property_revision']['user_id']['relationship'];
        $this->assertEquals('users_field_data', $relationship['base']);
        $this->assertEquals('uid', $relationship['base field']);
        $this->assertStringField($data['entity_test_mulrev__string']['string_value']);
        $this->assertViewsDataField($data['entity_test_mulrev__string']['string_value'], 'string');
        $this->assertEquals([
            'left_field' => 'id',
            'field' => 'entity_id',
            'extra' => [
                [
                    'field' => 'deleted',
                    'value' => 0,
                    'numeric' => TRUE,
                ],
            ],
        ], $data['entity_test_mulrev__string']['table']['join']['entity_test_mulrev_property_data']);
        $this->assertStringField($data['entity_test_mulrev_revision__string']['string_value']);
        $this->assertViewsDataField($data['entity_test_mulrev_revision__string']['string_value'], 'string');
        $this->assertEquals([
            'left_field' => 'revision_id',
            'field' => 'entity_id',
            'extra' => [
                [
                    'field' => 'deleted',
                    'value' => 0,
                    'numeric' => TRUE,
                ],
            ],
        ], $data['entity_test_mulrev_revision__string']['table']['join']['entity_test_mulrev_property_revision']);
    }
    
    /**
     * Tests generic stuff per field.
     *
     * @param array $data
     *   The views data to check.
     * @param string $field_name
     *   The entity field name.
     *
     * @internal
     */
    protected function assertViewsDataField(array $data, string $field_name) : void {
        $this->assertEquals($field_name, $data['entity field']);
    }
    
    /**
     * Tests views data for a string field.
     *
     * @param array $data
     *   The views data to check.
     *
     * @internal
     */
    protected function assertStringField(array $data) : void {
        $this->assertEquals('field', $data['field']['id']);
        $this->assertEquals('string', $data['filter']['id']);
        $this->assertEquals('string', $data['argument']['id']);
        $this->assertEquals('standard', $data['sort']['id']);
    }
    
    /**
     * Tests views data for a URI field.
     *
     * @param array $data
     *   The views data to check.
     *
     * @internal
     */
    protected function assertUriField(array $data) : void {
        $this->assertEquals('field', $data['field']['id']);
        $this->assertEquals('string', $data['field']['default_formatter']);
        $this->assertEquals('string', $data['filter']['id']);
        $this->assertEquals('string', $data['argument']['id']);
        $this->assertEquals('standard', $data['sort']['id']);
    }
    
    /**
     * Tests views data for a long text field.
     *
     * @param array $data
     *   The views data for the table this field is in.
     * @param string $field_name
     *   The name of the field being checked.
     *
     * @internal
     */
    protected function assertLongTextField(array $data, string $field_name) : void {
        $value_field = $data[$field_name . '__value'];
        $this->assertEquals('field', $value_field['field']['id']);
        $this->assertEquals($field_name . '__format', $value_field['field']['format']);
        $this->assertEquals('string', $value_field['filter']['id']);
        $this->assertEquals('string', $value_field['argument']['id']);
        $this->assertEquals('standard', $value_field['sort']['id']);
        $this->assertStringField($data[$field_name . '__format']);
    }
    
    /**
     * Tests views data for a UUID field.
     *
     * @param array $data
     *   The views data to check.
     *
     * @internal
     */
    protected function assertUuidField(array $data) : void {
        // @todo Can we provide additional support for UUIDs in views?
        $this->assertEquals('field', $data['field']['id']);
        $this->assertFalse($data['field']['click sortable']);
        $this->assertEquals('string', $data['filter']['id']);
        $this->assertEquals('string', $data['argument']['id']);
        $this->assertEquals('standard', $data['sort']['id']);
    }
    
    /**
     * Tests views data for a numeric field.
     *
     * @param array $data
     *   The views data to check.
     *
     * @internal
     */
    protected function assertNumericField(array $data) : void {
        $this->assertEquals('field', $data['field']['id']);
        $this->assertEquals('numeric', $data['filter']['id']);
        $this->assertEquals('numeric', $data['argument']['id']);
        $this->assertEquals('standard', $data['sort']['id']);
    }
    
    /**
     * Tests views data for a language field.
     *
     * @param array $data
     *   The views data to check.
     *
     * @internal
     */
    protected function assertLanguageField(array $data) : void {
        $this->assertEquals('field', $data['field']['id']);
        $this->assertEquals('language', $data['filter']['id']);
        $this->assertEquals('language', $data['argument']['id']);
        $this->assertEquals('standard', $data['sort']['id']);
    }
    
    /**
     * Tests views data for an entity reference field.
     *
     * @internal
     */
    protected function assertEntityReferenceField(array $data) : void {
        $this->assertEquals('field', $data['field']['id']);
        $this->assertEquals('numeric', $data['filter']['id']);
        $this->assertEquals('numeric', $data['argument']['id']);
        $this->assertEquals('standard', $data['sort']['id']);
    }
    
    /**
     * Tests views data for a bundle field.
     *
     * @internal
     */
    protected function assertBundleField(array $data) : void {
        $this->assertEquals('field', $data['field']['id']);
        $this->assertEquals('bundle', $data['filter']['id']);
        $this->assertEquals('string', $data['argument']['id']);
        $this->assertEquals('standard', $data['sort']['id']);
    }

}