public void Given_Epoch_Seconds_Returns_DateTime()
{
//arrange
var d1 = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
var d2 = new DateTime(2000, 6, 1, 8, 0, 0, DateTimeKind.Utc);
var d3 = new DateTime(2010, 12, 1, 16, 0, 0, DateTimeKind.Utc);
var d4 = new DateTime(2020, 12, 31, 23, 59, 59, DateTimeKind.Utc);
//act
var e1 = DateTimeExtensions.EpochToDateTime(0);
var e2 = DateTimeExtensions.EpochToDateTime(959846400);
var e3 = DateTimeExtensions.EpochToDateTime(1291219200);
var e4 = DateTimeExtensions.EpochToDateTime(1609459199);
//asset
Assert.AreEqual(d1, e1);
Assert.AreEqual(d2, e2);
Assert.AreEqual(d3, e3);
Assert.AreEqual(d4, e4);
}