public void adjust_mock_clock_time(double adjustment)
{
var time = new DateTimeOffset(2019, 7, 1, 14, 0, 0, TimeSpan.Zero);
Clock.Default = new MockClock(time);
Clock.AsMockClock().Adjust(adjustment);
Assert.Equal(time.AddMilliseconds(adjustment), Clock.Default.UtcNow);
}