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MoienTajik/IClock.cs

Last active March 18, 2021 09:18
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IClock abstracts DateTime & DateTimeOffset so you can easily mock time and unit-test.
Raw
IClock.cs
public interface IClock
{
DateTimeOffset UtcNow { get; }
}
public static class Clock
{
private static IClock _instance = new SystemClock();
public static IClock Instance
{
get => _instance;
set => _instance = value ?? throw new ArgumentException("Clock can not be set to null!");
}
public static DateTimeOffset UtcNow => _instance.UtcNow;
}
internal class SystemClock : IClock
{
public DateTimeOffset UtcNow => DateTimeOffset.UtcNow;
}
// Usage
public class Program
{
public static void Main()
{
var now = Clock.UtcNow();
}
}
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