ArbitraryRebuildTest.php

<?php

namespace Drupal\Tests\system\Functional\Form;

use Drupal\field\Entity\FieldConfig;
use Drupal\field\Entity\FieldStorageConfig;
use Drupal\Tests\BrowserTestBase;

/**
 * Tests altering forms to be rebuilt so there are multiple steps.
 *
 * @group Form
 */
class ArbitraryRebuildTest extends BrowserTestBase {
    
    /**
     * Modules to enable.
     *
     * @var array
     */
    public static $modules = [
        'text',
        'form_test',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    protected function setUp() {
        parent::setUp();
        // Auto-create a field for testing.
        FieldStorageConfig::create([
            'entity_type' => 'user',
            'field_name' => 'test_multiple',
            'type' => 'text',
            'cardinality' => -1,
            'translatable' => FALSE,
        ])->save();
        FieldConfig::create([
            'entity_type' => 'user',
            'field_name' => 'test_multiple',
            'bundle' => 'user',
            'label' => 'Test a multiple valued field',
        ])->save();
        \Drupal::service('entity_display.repository')->getFormDisplay('user', 'user', 'register')
            ->setComponent('test_multiple', [
            'type' => 'text_textfield',
            'weight' => 0,
        ])
            ->save();
    }
    
    /**
     * Tests a basic rebuild with the user registration form.
     */
    public function testUserRegistrationRebuild() {
        $edit = [
            'name' => 'foo',
            'mail' => 'bar@example.com',
        ];
        $this->drupalPostForm('user/register', $edit, 'Rebuild');
        $this->assertText('Form rebuilt.');
        $this->assertFieldByName('name', 'foo', 'Entered username has been kept.');
        $this->assertFieldByName('mail', 'bar@example.com', 'Entered mail address has been kept.');
    }
    
    /**
     * Tests a rebuild caused by a multiple value field.
     */
    public function testUserRegistrationMultipleField() {
        $edit = [
            'name' => 'foo',
            'mail' => 'bar@example.com',
        ];
        $this->drupalPostForm('user/register', $edit, t('Add another item'));
        $this->assertText('Test a multiple valued field', 'Form has been rebuilt.');
        $this->assertFieldByName('name', 'foo', 'Entered username has been kept.');
        $this->assertFieldByName('mail', 'bar@example.com', 'Entered mail address has been kept.');
    }

}