class AutotextfieldsTest

class AutotextfieldsTest extends WebDriverTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * {@inheritdoc}
     */
    public static $modules = [
        'ajax_example',
    ];
    
    /**
     * Test the user interactions for the Autotextfields example.
     */
    public function testAutotextfields() {
        // Get our Mink stuff.
        $session = $this->getSession();
        $page = $session->getPage();
        $assert = $this->assertSession();
        // Get the page.
        $form_url = Url::fromRoute('ajax_example.autotextfields');
        $this->drupalGet($form_url);
        // Check our initial state.
        $assert->checkboxNotChecked('ask_first_name');
        $assert->checkboxNotChecked('ask_last_name');
        $assert->fieldNotExists('first_name');
        $assert->fieldNotExists('last_name');
        // Submit the form. This tests what happens when there are no user
        // interactions because drupalPostForm() reloads the form.
        $this->drupalPostForm($form_url, [], 'Click Me');
        $assert->pageTextContains('Submit handler: First name: n/a Last name: n/a');
        // Ask for the first name.
        $page->checkField('ask_first_name');
        $assert->assertWaitOnAjaxRequest();
        $assert->fieldExists('first_name');
        $assert->fieldNotExists('last_name');
        // Submit the form. We have to find the field and set its value rather than
        // use drupalPostForm(), because when we post the form, it will be rebuilt.
        // We are testing the form state after AJAX has modified it, so we must
        // preserve that.
        $page->fillField('first_name', 'Dries');
        $page->pressButton('Click Me');
        $assert->pageTextContains('Submit handler: First name: Dries Last name: n/a');
        // Ask for the first and last name.
        $page->checkField('ask_first_name');
        $assert->assertWaitOnAjaxRequest();
        $assert->fieldExists('first_name');
        $page->checkField('ask_last_name');
        $assert->assertWaitOnAjaxRequest();
        $assert->fieldExists('last_name');
        // Submit the form.
        $page->fillField('first_name', 'Dries');
        $page->fillField('last_name', 'Buytaert');
        $page->pressButton('Click Me');
        $assert->pageTextContains('Submit handler: First name: Dries Last name: Buytaert');
        // Ask for only the last name.
        $page->checkField('ask_last_name');
        $assert->assertWaitOnAjaxRequest();
        $assert->fieldNotExists('first_name');
        $assert->fieldExists('last_name');
        // Submit the form.
        $page->fillField('last_name', 'Buytaert');
        $page->pressButton('Click Me');
        $assert->pageTextContains('Submit handler: First name: n/a Last name: Buytaert');
    }

}