Using native Convert from hex function for .NET 8

test/AMWD.Common.Tests/Extensions/StringExtensionsTest.cs

@@ -8,6 +8,19 @@ namespace AMWD.Common.Tests.Extensions
 	[TestClass]
 	public class StringExtensionsTest
 	{
+		[TestMethod]
+		[ExpectedException(typeof(ArgumentNullException))]
+		public void ShouldThrowArgumentNullExceptionWhenNull()
+		{
+			// arrange
+			string hex = null;
+
+			// act
+			var bytes = hex.HexToBytes();
+
+			// assert - ArgumentNullException
+		}
+
 		[TestMethod]
 		public void ShouldReturnEmptyList()
 		{
@@ -22,28 +35,19 @@ namespace AMWD.Common.Tests.Extensions
 			Assert.IsFalse(bytes.Any());
 		}
 
-		[TestMethod]
-		public void ShouldReturnEmptyListWhenInvalid()
+		[DataTestMethod]
+		[DataRow("aff", null)]
+		[DataRow("de:ad:be:e", ":")]
+		[DataRow("hell", "")]
+		[ExpectedException(typeof(FormatException))]
+		public void ShouldThrowFormatExceptionWhenInvalid(string hex, string delimiter)
 		{
 			// arrange
-			string hex1 = "aff";
-			string hex2 = "de:ad:be:e";
-			string hex3 = "hell";
 
 			// act
-			var bytes1 = hex1.HexToBytes();
-			var bytes2 = hex2.HexToBytes(":");
-			var bytes3 = hex3.HexToBytes();
+			var bytes = hex.HexToBytes(delimiter);
 
-			// assert
-			Assert.IsNotNull(bytes1);
-			Assert.IsFalse(bytes1.Any());
-
-			Assert.IsNotNull(bytes2);
-			Assert.IsFalse(bytes2.Any());
-
-			Assert.IsNotNull(bytes3);
-			Assert.IsFalse(bytes3.Any());
+			// assert - FormatException
 		}
 
 		[TestMethod]