@Test
public void isValidUuidTest() {

    Assert.assertFalse(UuidUtil.isValidUUID("9aa395cb8e914e77aeaf1a41d85bffa8"));
    Assert.assertFalse(UuidUtil.isValidUUID("9AA395CB-8E91-4E77-AEAF-1A41D85BFFA8"));
    Assert.assertTrue(UuidUtil.isValidUUID("00000000-0000-0000-0000-000000000000"));
    Assert.assertTrue(UuidUtil.isValidUUID("9aa395cb-8e91-4e77-aeaf-1a41d85bffa8"));
}