namespace Mr.BrickAdventures.Progression.Tests;

public class PlaythroughIdTests
{
    [Fact]
    public void The_empty_guid_is_not_a_playthrough()
    {
        // Ids arrive from an adapter, never from Guid.NewGuid() inside the domain — otherwise every
        // test touching identity would be non-deterministic. That makes a default-valued guid a
        // realistic mistake worth refusing.
        Assert.Throws<ArgumentException>(() => PlaythroughId.Of(Guid.Empty));
    }
}