function ThemeTest::testRegionClass

Tests that region attributes can be manipulated via preprocess functions.

File

core/modules/system/tests/src/Functional/Theme/ThemeTest.php, line 162

Class

ThemeTest

Tests low-level theme functions.

Namespace

Code

public function testRegionClass() : void {
  \Drupal::service('module_installer')->install([
    'block',
    'theme_region_test',
  ]);
  // Place a block.
  $this->drupalPlaceBlock('system_main_block', [
    'region' => 'sidebar_first',
  ]);
  $this->drupalGet('');
  $elements = $this->cssSelect(".region-sidebar-first.new_class");
  $this->assertCount(1, $elements, 'New class found.');
}