using Microsoft.VisualStudio.TestTools.UnitTesting; using X10D.Time; namespace X10D.Tests.Time; [TestClass] public class TimeSpanParserTests { [TestMethod] public void TryParse_ShouldThrow_GivenNullString() { string? value = null; Assert.ThrowsException(() => TimeSpanParser.TryParse(value!, out _)); } }