function AttributeTest::testAddClasses

Tests adding class attributes with the AttributeArray helper method. @covers ::addClass

File

core/tests/Drupal/Tests/Core/Template/AttributeTest.php, line 150

Class

AttributeTest

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

Namespace

Code

public function testAddClasses() : void {
  // Add empty Attribute object with no classes.
  $attribute = new Attribute();
  // Add no class on empty attribute.
  $attribute->addClass();
  $this->assertEmpty($attribute['class']);
  // Test various permutations of adding values to empty Attribute objects.
  foreach ([
    NULL,
    FALSE,
    '',
    [],
  ] as $value) {
    // Single value.
    $attribute->addClass($value);
    $this->assertEmpty((string) $attribute);
    // Multiple values.
    $attribute->addClass($value, $value);
    $this->assertEmpty((string) $attribute);
    // Single value in array.
    $attribute->addClass([
      $value,
    ]);
    $this->assertEmpty((string) $attribute);
    // Single value in arrays.
    $attribute->addClass([
      $value,
    ], [
      $value,
    ]);
    $this->assertEmpty((string) $attribute);
  }
  // Add one class on empty attribute.
  $attribute->addClass('banana');
  $this->assertEquals([
    'banana',
  ], $attribute['class']->value());
  // Add one class.
  $attribute->addClass('aa');
  $this->assertEquals([
    'banana',
    'aa',
  ], $attribute['class']->value());
  // Add multiple classes.
  $attribute->addClass('xx', 'yy');
  $this->assertEquals([
    'banana',
    'aa',
    'xx',
    'yy',
  ], $attribute['class']->value());
  // Add an array of classes.
  $attribute->addClass([
    'red',
    'green',
    'blue',
  ]);
  $this->assertEquals([
    'banana',
    'aa',
    'xx',
    'yy',
    'red',
    'green',
    'blue',
  ], $attribute['class']->value());
  // Add an array of duplicate classes.
  $attribute->addClass([
    'red',
    'green',
    'blue',
  ], [
    'aa',
    'aa',
    'banana',
  ], 'yy');
  $this->assertEquals('banana aa xx yy red green blue', (string) $attribute['class']);
}