class ElementTreeTest in Little helpers 7.2

Test the element tree utility functions.

Hierarchy

• class \Drupal\little_helpers\ElementTreeTest extends \Upal\DrupalUnitTestCase

File

tests/ElementTreeTest.php, line 10

Namespace

Drupal\little_helpers

class ElementTreeTest extends DrupalUnitTestCase {

  /**
   * Test reading and modifying the element tree.
   */
  public function testApplyRecursivelyPreOrder() {
    $test_array = [
      'a' => [
        'a1' => [],
      ],
      'b' => [],
      '#no-element' => 'test',
    ];
    $element_keys = [];
    $count = 0;
    ElementTree::applyRecursively($test_array, function (&$element, $key) use (&$element_keys, &$count) {
      if ($key) {
        $element_keys[] = $key;
      }
      $element['#index'] = $count++;
    });
    $this
      ->assertEqual([
      'a',
      'a1',
      'b',
    ], $element_keys);
    $this
      ->assertEqual([
      'a' => [
        'a1' => [
          '#index' => 2,
        ],
        '#index' => 1,
      ],
      'b' => [
        '#index' => 3,
      ],
      '#no-element' => 'test',
      '#index' => 0,
    ], $test_array);
  }

  /**
   * Test post-order traversal.
   */
  public function testApplyRecursivelyPostOrder() {
    $test_array = [
      'a' => [
        'a1' => [
          '#add' => [
            1,
            2,
          ],
        ],
        '#add' => [
          3,
        ],
      ],
      'b' => [
        '#add' => [
          4,
        ],
      ],
    ];
    ElementTree::applyRecursively($test_array, function (&$element, $key, &$parent) {
      $element += [
        '#sum' => 0,
        '#add' => [],
      ];
    });
    ElementTree::applyRecursively($test_array, function (&$element, $key, &$parent) {
      $element['#sum'] += array_sum($element['#add']);
      if ($parent) {
        $parent['#sum'] += $element['#sum'];
      }
    }, TRUE);
    $this
      ->assertEqual(3, $test_array['a']['a1']['#sum']);
    $this
      ->assertEqual(6, $test_array['a']['#sum']);
    $this
      ->assertEqual(10, $test_array['#sum']);
  }

}

Members

Name	Modifiers	Type	Description	Overrides
ElementTreeTest::testApplyRecursivelyPostOrder	public	function	Test post-order traversal.
ElementTreeTest::testApplyRecursivelyPreOrder	public	function	Test reading and modifying the element tree.