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 @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']);
}