ContentEntityFormCorrectUserInputMappingOnFieldDeltaElementsTest.php

<?php

namespace Drupal\FunctionalTests\Entity;

use Drupal\Core\Field\FieldStorageDefinitionInterface;
use Drupal\field\Entity\FieldConfig;
use Drupal\field\Entity\FieldStorageConfig;
use Drupal\Tests\BrowserTestBase;

/**
 * Tests the correct mapping of user input on the correct field delta elements.
 *
 * @group Entity
 */
class ContentEntityFormCorrectUserInputMappingOnFieldDeltaElementsTest extends BrowserTestBase {
    
    /**
     * The ID of the type of the entity under test.
     *
     * @var string
     */
    protected $entityTypeId;
    
    /**
     * The field name with multiple properties being test with the entity type.
     *
     * @var string
     */
    protected $fieldName;
    
    /**
     * {@inheritdoc}
     */
    public static $modules = [
        'entity_test',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() {
        parent::setUp();
        $web_user = $this->drupalCreateUser([
            'administer entity_test content',
        ]);
        $this->drupalLogin($web_user);
        // Create a field of field type "shape" with unlimited cardinality on the
        // entity type "entity_test".
        $this->entityTypeId = 'entity_test';
        $this->fieldName = 'shape';
        FieldStorageConfig::create([
            'field_name' => $this->fieldName,
            'entity_type' => $this->entityTypeId,
            'type' => 'shape',
            'cardinality' => FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED,
        ])
            ->save();
        FieldConfig::create([
            'entity_type' => $this->entityTypeId,
            'field_name' => $this->fieldName,
            'bundle' => $this->entityTypeId,
            'label' => 'Shape',
            'translatable' => FALSE,
        ])
            ->save();
        \Drupal::service('entity_display.repository')->getFormDisplay($this->entityTypeId, $this->entityTypeId)
            ->setComponent($this->fieldName, [
            'type' => 'shape_only_color_editable_widget',
        ])
            ->save();
    }
    
    /**
     * Tests the correct user input mapping on complex fields.
     */
    public function testCorrectUserInputMappingOnComplexFields() {
        
        /** @var ContentEntityStorageInterface $storage */
        $storage = $this->container
            ->get('entity_type.manager')
            ->getStorage($this->entityTypeId);
        
        /** @var ContentEntityInterface $entity */
        $entity = $storage->create([
            $this->fieldName => [
                [
                    'shape' => 'rectangle',
                    'color' => 'green',
                ],
                [
                    'shape' => 'circle',
                    'color' => 'blue',
                ],
            ],
        ]);
        $entity->save();
        $this->drupalGet($this->entityTypeId . '/manage/' . $entity->id() . '/edit');
        // Rearrange the field items.
        $edit = [
            "{$this->fieldName}[0][_weight]" => 0,
            "{$this->fieldName}[1][_weight]" => -1,
        ];
        // Executing an ajax call is important before saving as it will trigger
        // form state caching and so if for any reasons the form is rebuilt with
        // the entity built based on the user submitted values with already
        // reordered field items then the correct mapping will break after the form
        // builder maps over the new form the user submitted values based on the
        // previous delta ordering.
        //
        // This is how currently the form building process works and this test
        // ensures the correct behavior no matter what changes would be made to the
        // form builder or the content entity forms.
        $this->drupalPostForm(NULL, $edit, t('Add another item'));
        $this->drupalPostForm(NULL, [], t('Save'));
        // Reload the entity.
        $entity = $storage->load($entity->id());
        // Assert that after rearranging the field items the user input will be
        // mapped on the correct delta field items.
        $this->assertEquals($entity->get($this->fieldName)
            ->getValue(), [
            [
                'shape' => 'circle',
                'color' => 'blue',
            ],
            [
                'shape' => 'rectangle',
                'color' => 'green',
            ],
        ]);
    }

}