public void TestId()
{
HashSet <long> hashSet = new HashSet <long>();
Snowflake <Student> .SetNodesInfo(54321, 12345);
for (int i = 0; i < 10; i += 1)
{
long result = Snowflake <Student> .NextId;
Assert.DoesNotContain(result, hashSet);
hashSet.Add(result);
}
}