public void PingPongReplace_NumberListTo16() { PingPong testPingPong = new PingPong(); List <string> testList = new List <string> { "1", "2", "ping", "4", "pong", "ping", "7", "8", "ping", "pong", "11", "ping", "13", "14", "ping-pong", "16" }; CollectionAssert.AreEqual(testList, testPingPong.PingPongReplace(16)); }