lithium\tests\cases\util\StringTest::testMultipleUuidGeneration PHP Method

    public function testMultipleUuidGeneration()
    {
        $check = array();
        $count = 50;
        $pattern = "/^[a-f0-9]{8}-[a-f0-9]{4}-4[a-f0-9]{3}-[8-9a-b][a-f0-9]{3}-[a-f0-9]{12}\$/";
        for ($i = 0; $i < $count; $i++) {
            $result = String::uuid();
            $match = preg_match($pattern, $result);
            $this->assertNotEmpty($match);
            $this->assertFalse(in_array($result, $check));
            $check[] = $result;
        }
    }