EmailTest.php

<?php

namespace Drupal\Tests\system\Functional\Form;

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

/**
 * Tests the form API email element.
 *
 * @group Form
 */
class EmailTest extends BrowserTestBase {
    
    /**
     * Modules to enable.
     *
     * @var array
     */
    protected static $modules = [
        'form_test',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * Tests that #type 'email' fields are properly validated.
     */
    public function testFormEmail() {
        $edit = [];
        $edit['email'] = 'invalid';
        $edit['email_required'] = ' ';
        $this->drupalGet('form-test/email');
        $this->submitForm($edit, 'Submit');
        $this->assertSession()
            ->pageTextContains("The email address invalid is not valid.");
        $this->assertSession()
            ->pageTextContains("Address field is required.");
        $edit = [];
        $edit['email_required'] = '  foo.bar@example.com ';
        $this->drupalGet('form-test/email');
        $this->submitForm($edit, 'Submit');
        $values = Json::decode($this->getSession()
            ->getPage()
            ->getContent());
        $this->assertSame('', $values['email']);
        $this->assertEquals('foo.bar@example.com', $values['email_required']);
        $edit = [];
        $edit['email'] = 'foo@example.com';
        $edit['email_required'] = 'example@drupal.org';
        $this->drupalGet('form-test/email');
        $this->submitForm($edit, 'Submit');
        $values = Json::decode($this->getSession()
            ->getPage()
            ->getContent());
        $this->assertEquals('foo@example.com', $values['email']);
        $this->assertEquals('example@drupal.org', $values['email_required']);
    }

}