function AttributeTest::testAdd

Tests adding new values to an existing part of the attribute.

File

core/tests/Drupal/Tests/Core/Template/AttributeTest.php, line 63

Class

AttributeTest

@coversDefaultClass \Drupal\Core\Template\Attribute[[api-linebreak]] @group Template

Namespace

Code

public function testAdd() : void {
  $attribute = new Attribute([
    'class' => [
      'example-class',
    ],
  ]);
  $attribute['class'][] = 'other-class';
  $this->assertEquals(new AttributeArray('class', [
    'example-class',
    'other-class',
  ]), $attribute['class']);
}