using Xunit; namespace SabreTools.Wrappers.Test { public class XMIDTests { [Fact] public void NullString_Null() { string? data = null; var actual = XMID.Create(data); Assert.Null(actual); } [Fact] public void EmptyString_Null() { string? data = string.Empty; var actual = XMID.Create(data); Assert.Null(actual); } [Fact] public void InvalidString_Null() { string? data = "INVALID"; var actual = XMID.Create(data); Assert.Null(actual); } } }