feat: ✨ Finish Iteration

Tests/Interatif/RecursionTest.cs

@@ -0,0 +1,27 @@
+namespace Tests.Recursion;
+
+public class RecursionTest
+{
+    [Theory]
+    [InlineData("abcdef132", 0, true)]
+    [InlineData("!abcdef", 0, false)]
+    [InlineData("!abcdef", 1, true)]
+    [InlineData("abcdef!", 15, true)]
+    
+    public void IsAlphanumTest(string s, int i, bool expected)
+    {
+        bool actual = Iteration.Recursion.IsAlphanum(s, i);
+        Assert.Equal(expected, actual);
+    }
+    
+    [Theory]
+    [InlineData("42", 2, "24")]
+    [InlineData("123", 3, "321")]
+    [InlineData("ABcdeF",6, "FedcBA")]
+    
+    public void ReverseStrTest(string source, int lenght, string expected)
+    {
+        string actual = Iteration.Recursion.ReverseStr(source, lenght);
+        Assert.Equal(expected, actual);
+    }
+}

Tests/Stream/StreamTest.cs

@@ -0,0 +1,6 @@
+namespace Tests.Stream;
+
+public class StreamTest
+{
+    
+}