class MultistepFormTest

class MultistepFormTest extends BrowserTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'classy';
    
    /**
     * {@inheritdoc}
     */
    public static $modules = [
        'form_api_example',
    ];
    
    /**
     * Test of paths through the example wizard form.
     */
    public function testWizardForm() {
        $this->drupalGet(Url::fromRoute('form_api_example.multistep_form'));
        $page = $this->getSession()
            ->getPage();
        $h1 = $page->find('css', 'h1');
        $this->assertContains('Multistep form', $h1->getText());
        $desc = $page->find('css', '#edit-description label');
        $this->assertContains('page 1', $desc->getText());
        $this->submitForm([
            'first_name' => 'Bozo',
            'last_name' => 'Di Clown',
            'birth_year' => 1980,
        ], 'Next');
        // Really new page?
        $page2 = $this->getSession()
            ->getPage();
        $desc = $page2->find('css', '#edit-description label');
        $this->assertContains('page 2', $desc->getText());
        // Try the back button.
        $this->submitForm([], 'Back');
        $page1 = $this->getSession()
            ->getPage();
        $desc = $page1->find('css', '#edit-description label');
        $this->assertContains('page 1', $desc->getText());
        // Is the form still filled out?
        $first_name = $page1->findField('first_name')
            ->getValue();
        $this->assertEquals('Bozo', $first_name);
        $second_name = $page1->findField('last_name')
            ->getValue();
        $this->assertEquals('Di Clown', $second_name);
        $birth_year = $page1->findField('birth_year')
            ->getValue();
        $this->assertEquals('1980', $birth_year);
        // Back to the second page.
        $this->click('#edit-next');
        $page2 = $this->getSession()
            ->getPage();
        $desc = $page2->find('css', '#edit-description label');
        $this->assertContains('page 2', $desc->getText());
        $this->submitForm([
            'color' => 'neon green',
        ], 'Submit');
        // This should take us back to the first page with a status message.
        $messages = $this->getSession()
            ->getPage()
            ->find('css', 'ul.messages__list');
        $message_text = $messages->getHtml();
        $this->assertContains('Bozo Di Clown', $message_text);
        $this->assertContains('1980', $message_text);
        $this->assertContains('neon green', $message_text);
    }

}