EntityReferenceFieldCreationTest.php

<?php

namespace Drupal\Tests\system\Functional\Entity;

use Drupal\Tests\BrowserTestBase;
use Drupal\Tests\field\Traits\EntityReferenceTestTrait;

/**
 * Tests creating entity reference fields in the UI.
 *
 * @group entity
 */
class EntityReferenceFieldCreationTest extends BrowserTestBase {
  use EntityReferenceTestTrait;
  
  /**
   * {@inheritdoc}
   */
  protected static $modules = [
    'entity_test',
    'node',
    'field_ui',
  ];
  
  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'stark';
  
  /**
   * Tests that entity reference fields cannot target entity types without IDs.
   */
  public function testAddReferenceFieldTargetingEntityTypeWithoutId() {
    $this->drupalLogin($this->rootUser);
    $node_type = $this->drupalCreateContentType()
      ->id();
    // Entity types without an ID key should not be presented as options when
    // creating an entity reference field in the UI.
    $this->drupalGet("/admin/structure/types/manage/{$node_type}/fields/add-field");
    $edit = [
      'new_storage_type' => 'entity_reference',
      'label' => 'Test Field',
      'field_name' => 'test_reference_field',
    ];
    $this->submitForm($edit, 'Save and continue');
    $this->assertSession()
      ->optionNotExists('settings[target_type]', 'entity_test_no_id');
    // Trying to do it programmatically should raise an exception.
    $this->expectException('\\Drupal\\Core\\Field\\FieldException');
    $this->expectExceptionMessage('Entity type "entity_test_no_id" has no ID key and cannot be targeted by entity reference field "test_reference_field"');
    $this->createEntityReferenceField('node', $node_type, 'test_reference_field', 'Test Field', 'entity_test_no_id');
  }

}