FilterArrayTest.php

<?php

declare (strict_types=1);
namespace Drupal\Tests\Component\Utility;

use Drupal\Component\Utility\FilterArray;
use PHPUnit\Framework\Attributes\CoversClass;
use PHPUnit\Framework\Attributes\DataProvider;
use PHPUnit\Framework\Attributes\Group;
use PHPUnit\Framework\TestCase;

/**
 * Test filter array functions.
 */
class FilterArrayTest extends TestCase {
  
  /**
   * Tests removing empty strings.
   *
   * @legacy-covers ::removeEmptyStrings
   */
  public function testRemoveEmptyStrings(array $values, array $expected) : void {
    $this->assertEquals($expected, array_values(FilterArray::removeEmptyStrings($values)));
  }
  
  /**
   * Data provider for testRemoveEmptyStrings().
   *
   * @see testRemoveEmptyStrings()
   */
  public static function providerRemoveEmptyStrings() : \Generator {
    (yield 'strings' => [
      [
        '',
        ' ',
        '0',
        'true',
        'false',
      ],
      [
        ' ',
        '0',
        'true',
        'false',
      ],
    ]);
    (yield 'integers' => [
      [
        -1,
        0,
        1,
      ],
      [
        -1,
        0,
        1,
      ],
    ]);
    (yield 'null, true, false' => [
      [
        NULL,
        TRUE,
        FALSE,
      ],
      [
        TRUE,
      ],
    ]);
    $stringable = new class  implements \Stringable {
      public function __toString() : string {
        return 'foo';
      }

};
    (yield 'non-scalar' => [
      [
        new $stringable(),
      ],
      [
        new $stringable(),
      ],
    ]);
  }

}