tdd-time-to-live-class-tests

gistfile1.cs

[TestFixture]
public class TimeToLiveTests
{
	[Test]
	public void never_expiring_ttl_should_not_expire_at_relative_time()
	{
		TimeToLive.CreateNeverExpiring().ExpiresAtRelativeTime.Should().BeFalse();
	}

	[Test]
	public void never_expiring_ttl_should_not_expire_at_absolute_time()
	{
		TimeToLive.CreateNeverExpiring().ExpiresAtAbsoluteTime.Should().BeFalse();
	}

	[Test]
	public void never_expiring_ttl_should_fail_to_get_expires_at_value()
	{
		TimeToLive.CreateNeverExpiring().Invoking(ttl => { var validFor = ttl.ExpiresAt; })
			.ShouldThrow<InvalidOperationException>()
			.WithMessage("instance is not configured to expire at a specific moment in future", ComparisonMode.Substring);
	}

	[Test]
	public void never_expiring_ttl_should_equal_to_another_never_expiring_instance_of_ttl()
	{
		var neverExpiringTtl = TimeToLive.CreateNeverExpiring();
		neverExpiringTtl.Should().Be(TimeToLive.CreateNeverExpiring());
	}
}