public void TestNewCombGuid()
{
var guid = Guid.NewGuid();
var timestamp = new DateTime(2013, 4, 2, 0, 0, 0, 500, DateTimeKind.Utc); // half a second past midnight
var combGuid = _generator.NewCombGuid(guid, timestamp);
var expectedDays = (short)(timestamp.Date - new DateTime(1900, 1, 1, 0, 0, 0, DateTimeKind.Utc)).Days;
var expectedTimeTicks = 150; // half a second in SQL Server resolution
var bytes = combGuid.ToByteArray();
if (BitConverter.IsLittleEndian)
{
Array.Reverse(bytes, 10, 2);
Array.Reverse(bytes, 12, 4);
}
var days = BitConverter.ToInt16(bytes, 10);
var timeTicks = BitConverter.ToInt32(bytes, 12);
Assert.IsTrue(guid.ToByteArray().Take(10).SequenceEqual(bytes.Take(10))); // first 10 bytes are from the base Guid
Assert.AreEqual(expectedDays, days);
Assert.AreEqual(expectedTimeTicks, timeTicks);
}