public function test_random__charset()
{
$test = \UString::random(16, 'abc');
$this->assertEquals(0, preg_match('/[^abc]/', $test));
}
public function test_random__charset()
{
$test = \UString::random(16, 'abc');
$this->assertEquals(0, preg_match('/[^abc]/', $test));
}