class EntityReferenceRelationshipTest

class EntityReferenceRelationshipTest extends ViewsKernelTestBase {
    use EntityReferenceFieldCreationTrait;
    
    /**
     * Views used by this test.
     *
     * @var array
     */
    public static $testViews = [
        'test_entity_reference_entity_test_view',
        'test_entity_reference_entity_test_view_long',
        'test_entity_reference_reverse_entity_test_view',
        'test_entity_reference_entity_test_mul_view',
        'test_entity_reference_reverse_entity_test_mul_view',
        'test_entity_reference_group_by_empty_relationships',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'user',
        'field',
        'entity_test',
        'views',
        'entity_reference_test_views',
    ];
    
    /**
     * The entity_test entities used by the test.
     *
     * @var array
     */
    protected $entities = [];
    
    /**
     * {@inheritdoc}
     */
    protected function setUp($import_test_views = TRUE) : void {
        parent::setUp();
        $this->installEntitySchema('user');
        $this->installEntitySchema('user_role');
        $this->installEntitySchema('entity_test');
        $this->installEntitySchema('entity_test_mul');
        $this->installEntitySchema('entity_test_mul_changed');
        // Create reference from entity_test to entity_test_mul.
        $this->createEntityReferenceField('entity_test', 'entity_test', 'field_test_data', 'field_test_data', 'entity_test_mul');
        // Create reference from entity_test_mul to entity_test.
        $this->createEntityReferenceField('entity_test_mul', 'entity_test_mul', 'field_data_test', 'field_data_test', 'entity_test');
        // Create another field for testing with a long name. So its storage name
        // will become hashed. Use entity_test_mul_changed, so the resulting field
        // tables created will be greater than 48 chars long.
        // @see \Drupal\Core\Entity\Sql\DefaultTableMapping::generateFieldTableName()
        $this->createEntityReferenceField('entity_test_mul_changed', 'entity_test_mul_changed', 'field_test_data_with_a_long_name', 'field_test_data_with_a_long_name', 'entity_test');
        // Create reference from entity_test_mul to entity_test cardinality: infinite.
        $this->createEntityReferenceField('entity_test_mul', 'entity_test_mul', 'field_data_test_unlimited', 'field_data_test_unlimited', 'entity_test', 'default', [], FieldStorageConfig::CARDINALITY_UNLIMITED);
        ViewTestData::createTestViews(static::class, [
            'entity_reference_test_views',
        ]);
    }
    
    /**
     * Tests using the views relationship.
     */
    public function testNoDataTableRelationship() : void {
        // Create some test entities which link each other.
        $referenced_entity = EntityTestMul::create();
        $referenced_entity->save();
        $entity = EntityTest::create();
        $entity->field_test_data->target_id = $referenced_entity->id();
        $entity->save();
        $this->assertEquals($referenced_entity->id(), $entity->field_test_data[0]->entity
            ->id());
        $this->entities[] = $entity;
        $entity = EntityTest::create();
        $entity->field_test_data->target_id = $referenced_entity->id();
        $entity->save();
        $this->assertEquals($referenced_entity->id(), $entity->field_test_data[0]->entity
            ->id());
        $this->entities[] = $entity;
        Views::viewsData()->clear();
        // Check the generated views data.
        $views_data = Views::viewsData()->get('entity_test__field_test_data');
        $this->assertEquals('standard', $views_data['field_test_data']['relationship']['id']);
        $this->assertEquals('entity_test_mul_property_data', $views_data['field_test_data']['relationship']['base']);
        $this->assertEquals('id', $views_data['field_test_data']['relationship']['base field']);
        $this->assertEquals('field_test_data_target_id', $views_data['field_test_data']['relationship']['relationship field']);
        $this->assertEquals('entity_test_mul', $views_data['field_test_data']['relationship']['entity type']);
        // Check the backwards reference.
        $views_data = Views::viewsData()->get('entity_test_mul_property_data');
        $this->assertEquals('entity_reverse', $views_data['reverse__entity_test__field_test_data']['relationship']['id']);
        $this->assertEquals('entity_test', $views_data['reverse__entity_test__field_test_data']['relationship']['base']);
        $this->assertEquals('id', $views_data['reverse__entity_test__field_test_data']['relationship']['base field']);
        $this->assertEquals('entity_test__field_test_data', $views_data['reverse__entity_test__field_test_data']['relationship']['field table']);
        $this->assertEquals('field_test_data_target_id', $views_data['reverse__entity_test__field_test_data']['relationship']['field field']);
        $this->assertEquals('field_test_data', $views_data['reverse__entity_test__field_test_data']['relationship']['field_name']);
        $this->assertEquals('entity_test', $views_data['reverse__entity_test__field_test_data']['relationship']['entity_type']);
        $this->assertEquals([
            'field' => 'deleted',
            'value' => 0,
            'numeric' => TRUE,
        ], $views_data['reverse__entity_test__field_test_data']['relationship']['join_extra'][0]);
        // Check an actual test view.
        $view = Views::getView('test_entity_reference_entity_test_view');
        $this->executeView($view);
        
        /** @var \Drupal\views\ResultRow $row */
        foreach ($view->result as $index => $row) {
            // Check that the actual ID of the entity is the expected one.
            $this->assertEquals($this->entities[$index]
                ->id(), $row->id);
            // Also check that we have the correct result entity.
            $this->assertEquals($this->entities[$index]
                ->id(), $row->_entity
                ->id());
            // Test the forward relationship.
            $this->assertEquals(1, $row->entity_test_mul_property_data_entity_test__field_test_data_i);
            // Test that the correct relationship entity is on the row.
            $this->assertEquals(1, $row->_relationship_entities['field_test_data']
                ->id());
            $this->assertEquals('entity_test_mul', $row->_relationship_entities['field_test_data']
                ->bundle());
        }
        // Check the backwards reference view.
        $view = Views::getView('test_entity_reference_reverse_entity_test_view');
        $this->executeView($view);
        
        /** @var \Drupal\views\ResultRow $row */
        foreach ($view->result as $index => $row) {
            $this->assertEquals(1, $row->id);
            $this->assertEquals(1, $row->_entity
                ->id());
            // Test the backwards relationship.
            $this->assertEquals($this->entities[$index]
                ->id(), $row->field_test_data_entity_test_mul_property_data_id);
            // Test that the correct relationship entity is on the row.
            $this->assertEquals($this->entities[$index]
                ->id(), $row->_relationship_entities['reverse__entity_test__field_test_data']
                ->id());
            $this->assertEquals('entity_test', $row->_relationship_entities['reverse__entity_test__field_test_data']
                ->bundle());
        }
    }
    
    /**
     * Tests views data generated for relationship.
     *
     * @see entity_reference_field_views_data()
     */
    public function testDataTableRelationship() : void {
        // Create some test entities which link each other.
        $referenced_entity = EntityTest::create();
        $referenced_entity->save();
        $entity = EntityTestMul::create();
        $entity->field_data_test->target_id = $referenced_entity->id();
        $entity->save();
        $this->assertEquals($referenced_entity->id(), $entity->field_data_test[0]->entity
            ->id());
        $this->entities[] = $entity;
        $entity = EntityTestMul::create();
        $entity->field_data_test->target_id = $referenced_entity->id();
        $entity->save();
        $this->assertEquals($referenced_entity->id(), $entity->field_data_test[0]->entity
            ->id());
        $this->entities[] = $entity;
        Views::viewsData()->clear();
        // Check the generated views data.
        $views_data = Views::viewsData()->get('entity_test_mul__field_data_test');
        $this->assertEquals('standard', $views_data['field_data_test']['relationship']['id']);
        $this->assertEquals('entity_test', $views_data['field_data_test']['relationship']['base']);
        $this->assertEquals('id', $views_data['field_data_test']['relationship']['base field']);
        $this->assertEquals('field_data_test_target_id', $views_data['field_data_test']['relationship']['relationship field']);
        $this->assertEquals('entity_test', $views_data['field_data_test']['relationship']['entity type']);
        // Check the backwards reference.
        $views_data = Views::viewsData()->get('entity_test');
        $this->assertEquals('entity_reverse', $views_data['reverse__entity_test_mul__field_data_test']['relationship']['id']);
        $this->assertEquals('entity_test_mul_property_data', $views_data['reverse__entity_test_mul__field_data_test']['relationship']['base']);
        $this->assertEquals('id', $views_data['reverse__entity_test_mul__field_data_test']['relationship']['base field']);
        $this->assertEquals('entity_test_mul__field_data_test', $views_data['reverse__entity_test_mul__field_data_test']['relationship']['field table']);
        $this->assertEquals('field_data_test_target_id', $views_data['reverse__entity_test_mul__field_data_test']['relationship']['field field']);
        $this->assertEquals('field_data_test', $views_data['reverse__entity_test_mul__field_data_test']['relationship']['field_name']);
        $this->assertEquals('entity_test_mul', $views_data['reverse__entity_test_mul__field_data_test']['relationship']['entity_type']);
        $this->assertEquals([
            'field' => 'deleted',
            'value' => 0,
            'numeric' => TRUE,
        ], $views_data['reverse__entity_test_mul__field_data_test']['relationship']['join_extra'][0]);
        // Check an actual test view.
        $view = Views::getView('test_entity_reference_entity_test_mul_view');
        $this->executeView($view);
        
        /** @var \Drupal\views\ResultRow $row */
        foreach ($view->result as $index => $row) {
            // Check that the actual ID of the entity is the expected one.
            $this->assertEquals($this->entities[$index]
                ->id(), $row->id);
            // Also check that we have the correct result entity.
            $this->assertEquals($this->entities[$index]
                ->id(), $row->_entity
                ->id());
            // Test the forward relationship.
            $this->assertEquals(1, $row->entity_test_entity_test_mul__field_data_test_id);
            // Test that the correct relationship entity is on the row.
            $this->assertEquals(1, $row->_relationship_entities['field_data_test']
                ->id());
            $this->assertEquals('entity_test', $row->_relationship_entities['field_data_test']
                ->bundle());
        }
        // Check the backwards reference view.
        $view = Views::getView('test_entity_reference_reverse_entity_test_mul_view');
        $this->executeView($view);
        
        /** @var \Drupal\views\ResultRow $row */
        foreach ($view->result as $index => $row) {
            $this->assertEquals(1, $row->id);
            $this->assertEquals(1, $row->_entity
                ->id());
            // Test the backwards relationship.
            $this->assertEquals($this->entities[$index]
                ->id(), $row->field_data_test_entity_test_id);
            // Test that the correct relationship entity is on the row.
            $this->assertEquals($this->entities[$index]
                ->id(), $row->_relationship_entities['reverse__entity_test_mul__field_data_test']
                ->id());
            $this->assertEquals('entity_test_mul', $row->_relationship_entities['reverse__entity_test_mul__field_data_test']
                ->bundle());
        }
    }
    
    /**
     * Tests views data generated for relationship.
     *
     * @see entity_reference_field_views_data()
     */
    public function testDataTableRelationshipWithLongFieldName() : void {
        // Create some test entities which link each other.
        $referenced_entity = EntityTest::create();
        $referenced_entity->save();
        $entity = EntityTestMulChanged::create();
        $entity->field_test_data_with_a_long_name->target_id = $referenced_entity->id();
        $entity->save();
        $this->entities[] = $entity;
        $entity = EntityTestMulChanged::create();
        $entity->field_test_data_with_a_long_name->target_id = $referenced_entity->id();
        $entity->save();
        $this->entities[] = $entity;
        Views::viewsData()->clear();
        // Check an actual test view.
        $view = Views::getView('test_entity_reference_entity_test_view_long');
        $this->executeView($view);
        
        /** @var \Drupal\views\ResultRow $row */
        foreach ($view->result as $index => $row) {
            // Check that the actual ID of the entity is the expected one.
            $this->assertEquals($this->entities[$index]
                ->id(), $row->id);
            // Also check that we have the correct result entity.
            $this->assertEquals($this->entities[$index]
                ->id(), $row->_entity
                ->id());
            // Test the forward relationship.
            // $this->assertEquals(1, $row->entity_test_entity_test_mul__field_data_test_id);
            // Test that the correct relationship entity is on the row.
            $this->assertEquals(1, $row->_relationship_entities['field_test_data_with_a_long_name']
                ->id());
            $this->assertEquals('entity_test', $row->_relationship_entities['field_test_data_with_a_long_name']
                ->bundle());
        }
    }
    
    /**
     * Tests group by with optional and empty relationship.
     */
    public function testGroupByWithEmptyRelationships() : void {
        $entities = [];
        // Create 4 entities with name1 and 3 entities with name2.
        for ($i = 1; $i <= 4; $i++) {
            $entity = [
                'name' => 'name' . $i,
            ];
            $entity = EntityTest::create($entity);
            $entities[] = $entity;
            $entity->save();
        }
        $entity = EntityTestMul::create([
            'name' => 'name1',
        ]);
        $entity->field_data_test_unlimited = [
            [
                'target_id' => $entities[0]->id(),
            ],
            [
                'target_id' => $entities[1]->id(),
            ],
            [
                'target_id' => $entities[2]->id(),
            ],
        ];
        $entity->save();
        $entity = EntityTestMul::create([
            'name' => 'name2',
        ]);
        $entity->field_data_test_unlimited = [
            [
                'target_id' => $entities[0]->id(),
            ],
            [
                'target_id' => $entities[1]->id(),
            ],
        ];
        $entity->save();
        $entity = EntityTestMul::create([
            'name' => 'name3',
        ]);
        $entity->field_data_test_unlimited->target_id = $entities[0]->id();
        $entity->save();
        $view = Views::getView('test_entity_reference_group_by_empty_relationships');
        $this->executeView($view);
        $this->assertCount(4, $view->result);
        // First three results should contain a reference from EntityTestMul.
        $this->assertNotEmpty($view->getStyle()
            ->getField(0, 'name_2'));
        $this->assertNotEmpty($view->getStyle()
            ->getField(1, 'name_2'));
        $this->assertNotEmpty($view->getStyle()
            ->getField(2, 'name_2'));
        // Fourth result has no reference from EntityTestMul hence the output for
        // should be empty.
        $this->assertEquals('', $view->getStyle()
            ->getField(3, 'name_2'));
        $fields = $view->field;
        // Check getValue for reference with a value. The first 3 rows reference
        // EntityTestMul, so have value 'name1'.
        $this->assertEquals('name1', $fields['name_2']->getValue($view->result[0]));
        $this->assertEquals('name1', $fields['name_2']->getValue($view->result[1]));
        $this->assertEquals('name1', $fields['name_2']->getValue($view->result[2]));
        // Ensure getValue works on empty references.
        $this->assertNull($fields['name_2']->getValue($view->result[3]));
    }
    
    /**
     * Test that config entities don't get relationships added.
     */
    public function testEntityReferenceConfigEntity() : void {
        // Create reference from entity_test to a config entity.
        $this->createEntityReferenceField('entity_test', 'entity_test', 'field_test_config_entity', 'field_test_config_entity', 'user_role');
        Views::viewsData()->clear();
        $views_data = Views::viewsData()->getAll();
        // Test that a relationship got added for content entities but not config
        // entities.
        $this->assertTrue(isset($views_data['entity_test__field_test_data']['field_test_data']['relationship']));
        $this->assertFalse(isset($views_data['entity_test__field_test_config_entity']['field_test_config_entity']['relationship']));
    }

}