class RegionalSettingsFormTest

class RegionalSettingsFormTest extends BrowserTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'system',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * A user with permission to administer site configuration.
     *
     * @var \Drupal\user\UserInterface
     */
    protected UserInterface $adminAccount;
    
    /**
     * Tests the system_regional_settings form.
     */
    public function testRegionalSettingsForm() : void {
        $assert_session = $this->assertSession();
        $this->drupalGet('admin/config/regional/settings');
        $assert_session->statusCodeEquals(403);
        $this->adminAccount = $this->setUpCurrentUser([], [
            'administer site configuration',
        ]);
        $this->drupalLogin($this->adminAccount);
        $this->drupalGet('admin/config/regional/settings');
        $assert_session->statusCodeEquals(200);
        $assert_session->elementTextEquals('css', 'main h1', 'Regional settings');
        // Check for available fields and submit default form.
        $assert_session->fieldValueEquals('edit-site-default-country', '');
        // @see \Drupal\Core\Test\FunctionalTestSetupTrait::initConfig().
        $assert_session->fieldValueEquals('edit-date-default-timezone', 'Australia/Sydney');
        $this->submitForm([], 'Save configuration');
        $assert_session->pageTextContains('The configuration options have been saved.');
        $edit = [
            'site_default_country' => 'US',
            'date_first_day' => 4,
            'date_default_timezone' => 'America/Chicago',
            'empty_timezone_message' => FALSE,
            'user_default_timezone' => 2,
            'configurable_timezones' => TRUE,
        ];
        $this->submitForm($edit, 'Save configuration');
        $assert_session->pageTextContains('The configuration options have been saved.');
        // Check if values are properly displayed on form.
        $assert_session->fieldValueEquals('site_default_country', 'US');
        $assert_session->fieldValueEquals('date_first_day', 4);
        $assert_session->fieldValueEquals('date_default_timezone', 'America/Chicago');
        $assert_session->checkboxNotChecked('empty_timezone_message');
        $assert_session->fieldValueEquals('user_default_timezone', 2);
        $assert_session->checkboxChecked('configurable_timezones');
        // Also check saved configuration.
        $date_config = $this->config('system.date');
        $this->assertSame('US', $date_config->get('country.default'));
        $this->assertSame(4, $date_config->get('first_day'));
        $this->assertSame('America/Chicago', $date_config->get('timezone.default'));
        $this->assertFalse($date_config->get('timezone.user.warn'));
        $this->assertSame(2, $date_config->get('timezone.user.default'));
        $this->assertTrue($date_config->get('timezone.user.configurable'));
    }

}