RebuildTest.php

<?php

namespace Drupal\Tests\system\Functional\Form;

use Drupal\Tests\BrowserTestBase;

/**
 * Tests functionality of \Drupal\Core\Form\FormBuilderInterface::rebuildForm().
 *
 * @group Form
 */
class RebuildTest extends BrowserTestBase {
    
    /**
     * Modules to enable.
     *
     * @var array
     */
    protected static $modules = [
        'node',
        'form_test',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * A user for testing.
     *
     * @var \Drupal\user\UserInterface
     */
    protected $webUser;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->drupalCreateContentType([
            'type' => 'page',
            'name' => 'Basic page',
        ]);
        $this->webUser = $this->drupalCreateUser([
            'access content',
        ]);
        $this->drupalLogin($this->webUser);
    }
    
    /**
     * Tests preservation of values.
     */
    public function testRebuildPreservesValues() {
        $edit = [
            'checkbox_1_default_off' => TRUE,
            'checkbox_1_default_on' => FALSE,
            'text_1' => 'foo',
        ];
        $this->drupalGet('form-test/form-rebuild-preserve-values');
        $this->submitForm($edit, 'Add more');
        $assert_session = $this->assertSession();
        // Verify that initial elements retained their submitted values.
        $assert_session->checkboxChecked('edit-checkbox-1-default-off');
        $assert_session->checkboxNotChecked('edit-checkbox-1-default-on');
        $assert_session->fieldValueEquals('edit-text-1', 'foo');
        // Verify that newly added elements were initialized with their default values.
        $assert_session->checkboxChecked('edit-checkbox-2-default-on');
        $assert_session->checkboxNotChecked('edit-checkbox-2-default-off');
        $assert_session->fieldValueEquals('edit-text-2', 'DEFAULT 2');
    }

}