| public static GenerateTimeBasedGuid ( ) : System.Guid | ||
| return | System.Guid | |
public void GetDateTimeOffset()
{
// arrange
var expected = new DateTimeOffset(1980, 3, 14, 12, 23, 42, 112, TimeSpan.Zero);
var guid = GuidGenerator.GenerateTimeBasedGuid(expected);
// act
var actual = GuidGenerator.GetDateTimeOffset(guid);
// assert
Assert.AreEqual(expected, actual);
}
public void GetDateTime()
{
// arrange
var expected = new DateTime(1980, 3, 14, 12, 23, 42, 112, DateTimeKind.Utc);
var guid = GuidGenerator.GenerateTimeBasedGuid(expected);
// act
var actual = GuidGenerator.GetDateTime(guid);
// assert
Assert.AreEqual(expected, actual);
}
public void Type1Check()
{
// arrange
var expected = GuidVersion.TimeBased;
var guid = GuidGenerator.GenerateTimeBasedGuid();
// act
var actual = guid.GetVersion();
// assert
Assert.AreEqual(expected, actual);
}
public void DoesNotCreateDuplicateWhenTimeHasNotPassed()
{
// arrange
DateTimeOffset currentTime = DateTimeOffset.UtcNow;
TimestampHelper.UtcNow = () => currentTime; //make sure all calls will return the same time
Guid firstGuid = GuidGenerator.GenerateTimeBasedGuid();
// act
Guid secondGuid = GuidGenerator.GenerateTimeBasedGuid();
// assert
Assert.True(firstGuid != secondGuid, "first: " + firstGuid + " second: " + secondGuid);
//Assert.NotEqual(firstGuid,secondGuid);
}
public void ClockSequenceChangesWhenTimeMovesBackward()
{
Func <Guid, short> getClockSequence = (guid) => {
byte[] clockSequenceBytes = new byte[2];
Array.Copy(guid.ToByteArray(), 8, clockSequenceBytes, 0, 2);
return(BitConverter.ToInt16(clockSequenceBytes, 0));
};
// arrange
DateTimeOffset currentTime = DateTimeOffset.UtcNow;
TimestampHelper.UtcNow = () => currentTime;
Guid firstGuid = GuidGenerator.GenerateTimeBasedGuid();
// act
TimestampHelper.UtcNow = () => currentTime.AddTicks(-1); //make sure clock went backwards
Guid secondGuid = GuidGenerator.GenerateTimeBasedGuid();
// assert
//clock sequence is not equal
Assert.NotEqual(getClockSequence(firstGuid), getClockSequence(secondGuid));
}
