StateValuesCleanTest.php

<?php

declare (strict_types=1);
namespace Drupal\Tests\system\Functional\Form;

use Drupal\Component\Serialization\Json;
use Drupal\Tests\BrowserTestBase;

/**
 * Tests the proper removal of submitted form values.
 *
 * @see \Drupal\Core\Form\FormState::cleanValues()
 *
 * @group Form
 */
class StateValuesCleanTest extends BrowserTestBase {
    
    /**
     * Modules to enable.
     *
     * @var array
     */
    protected static $modules = [
        'form_test',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * Tests \Drupal\Core\Form\FormState::cleanValues().
     */
    public function testFormStateValuesClean() : void {
        $this->drupalGet('form_test/form-state-values-clean');
        $this->submitForm([], 'Submit');
        $values = Json::decode($this->getSession()
            ->getPage()
            ->getContent());
        // Setup the expected result.
        $result = [
            'beer' => 1000,
            'baz' => [
                'beer' => 2000,
            ],
        ];
        // Verify that all internal Form API elements were removed.
        $this->assertFalse(isset($values['form_id']), 'form_id was removed.');
        $this->assertFalse(isset($values['form_token']), 'form_token was removed.');
        $this->assertFalse(isset($values['form_build_id']), 'form_build_id was removed.');
        $this->assertFalse(isset($values['op']), 'op was removed.');
        // Verify that all buttons were removed.
        $this->assertFalse(isset($values['foo']), 'foo was removed.');
        $this->assertFalse(isset($values['bar']), 'bar was removed.');
        $this->assertFalse(isset($values['baz']['foo']), 'foo was removed.');
        $this->assertFalse(isset($values['baz']['baz']), 'baz was removed.');
        // Verify values manually added for cleaning were removed.
        $this->assertFalse(isset($values['wine']), 'wine was removed.');
        // Verify that nested form value still exists.
        $this->assertTrue(isset($values['baz']['beer']), 'Nested form value still exists.');
        // Verify that actual form values equal resulting form values.
        $this->assertEquals($result, $values, 'Expected form values equal actual form values.');
    }

}