F Add MultipleOfThree Action

TddLikeYouMeanIt/FizzBuzzTests.cs

@@ -105,5 +105,28 @@ public Answer Transform(int source)
 
             return new Default_RuleEvalAction().Act(turnCount);
         }
+
+        public sealed class MultipleOfThree_RuleEvalAction : IRuleEvalAction
+        {
+            private readonly IRule _rule;
+            private readonly IRuleEvalAction _nextAction;
+
+            public MultipleOfThree_RuleEvalAction(IRuleEvalAction nextAction) :this(new MultipleOfThreeRule(), nextAction){}
+
+            private MultipleOfThree_RuleEvalAction(IRule rule, IRuleEvalAction nextAction)
+            {
+                _rule = rule;
+                _nextAction = nextAction;
+            }
+
+            public Answer Act(TurnCount turnCount)
+            {
+                if (ShouldHandle(turnCount)) return new FizzAnswer();
+
+                return _nextAction.Act(turnCount);
+            }
+
+            private bool ShouldHandle(TurnCount turnCount) => _rule.Matches(turnCount);
+        }
     }
 }