Add enumerable extensions tests

BinaryObjectScanner.Test/EnumerableExtensionsTests.cs

@@ -0,0 +1,48 @@
+using System;
+using System.Collections.Generic;
+using Xunit;
+
+namespace BinaryObjectScanner.Tests
+{
+    public class EnumerableExtensionsTests
+    {
+        [Fact]
+        public void IterateWithAction_EmptyEnumerable_Success()
+        {
+            List<string> set = new List<string>();
+            Action<string> action = (s) => s.ToLowerInvariant();
+
+            set.IterateWithAction(action);
+            Assert.Empty(set);
+        }
+
+        [Fact]
+        public void IterateWithAction_EmptyAction_Success()
+        {
+            List<string> set = ["a", "b", "c"];
+            Action<string> action = (s) => { };
+
+            set.IterateWithAction(action);
+            Assert.Equal(3, set.Count);
+        }
+
+        [Fact]
+        public void IterateWithAction_Valid_Success()
+        {
+            List<string> set = ["a", "b", "c"];
+            List<string> actual = new List<string>();
+
+            Action<string> action = (s) =>
+            {
+                lock (actual)
+                {
+                    actual.Add(s.ToUpperInvariant());
+                }
+            };
+
+            set.IterateWithAction(action);
+            Assert.Equal(3, set.Count);
+            Assert.Equal(3, actual.Count);
+        }
+    }
+}