public function RandomTest::testRandomStringUniqueness in Drupal 9

Same name and namespace in other branches

1. 8 core/tests/Drupal/Tests/Component/Utility/RandomTest.php \Drupal\Tests\Component\Utility\RandomTest::testRandomStringUniqueness()
2. 10 core/tests/Drupal/Tests/Component/Utility/RandomTest.php \Drupal\Tests\Component\Utility\RandomTest::testRandomStringUniqueness()

Tests unique random string generation.

@covers ::string

File

core/tests/Drupal/Tests/Component/Utility/RandomTest.php, line 31

Class

RandomTest

Tests random data generation.

Namespace

Drupal\Tests\Component\Utility

Code

public function testRandomStringUniqueness() {
  $strings = [];
  $random = new Random();
  for ($i = 0; $i <= 50; $i++) {
    $str = $random
      ->string(1, TRUE);
    $this
      ->assertFalse(isset($strings[$str]), 'Generated duplicate random string ' . $str);
    $strings[$str] = TRUE;
  }
}