Solution restructured to use multiple test projects

test/AMWD.Common.Tests/Cli/EnumerableWalkerTest.cs

@@ -0,0 +1,89 @@
+using System;
+using System.Collections.Generic;
+using AMWD.Common.Cli;
+
+namespace AMWD.Common.Tests.Cli
+{
+	[TestClass]
+	public class EnumerableWalkerTest
+	{
+		private List<string> _list;
+
+		[TestInitialize]
+		public void Initialize()
+		{
+			_list = ["one", "two", "three", "four"];
+		}
+
+		[TestMethod]
+		[ExpectedException(typeof(ArgumentNullException))]
+		public void ShouldThrowExceptionOnNullReference()
+		{
+			// arrange
+
+			// act
+			_ = new EnumerableWalker<object>(null);
+
+			// assert - ArgumentNullException
+			Assert.Fail();
+		}
+
+		[TestMethod]
+		public void ShouldReturnEnumerator()
+		{
+			// arrange
+			var walker = new EnumerableWalker<string>(_list);
+
+			// act
+			var enumerator = walker.GetEnumerator();
+
+			// assert
+			Assert.IsNotNull(enumerator);
+		}
+
+		[TestMethod]
+		public void ShouldReturnGenericEnumerator()
+		{
+			// arrange
+			var walker = new EnumerableWalker<string>(_list);
+
+			// act
+			var enumerator = ((IEnumerable<string>)walker).GetEnumerator();
+
+			// assert
+			Assert.IsNotNull(enumerator);
+		}
+
+		[TestMethod]
+		public void ShouldReturnItems()
+		{
+			// arrange
+			var walker = new EnumerableWalker<string>(_list);
+			_ = walker.GetEnumerator();
+
+			string[] items = new string[_list.Count];
+
+			// act
+			for (int i = 0; i < _list.Count; i++)
+				items[i] = walker.GetNext();
+
+			// assert
+			for (int i = 0; i < _list.Count; i++)
+				Assert.AreEqual(_list[i], items[i], $"Position {i} failed");
+		}
+
+		[TestMethod]
+		public void ShouldReturnDefaultWhenNothingLeft()
+		{
+			// arrange
+			var walker = new EnumerableWalker<string>(Array.Empty<string>());
+			_ = walker.GetEnumerator();
+
+			// act
+			string item = walker.GetNext();
+
+			// assert
+			Assert.AreEqual(default, item);
+		}
+	}
+}