public void RockWinsScissor()
        {
            var rock = new Rock();
            var paper = new Scissor();

            Assert.IsTrue(rock.Defeat(paper));
        }
        public void RockLostSpock()
        {
            var rock = new Rock();
            var spock = new Spock();

            Assert.IsFalse(rock.Defeat(spock));
        }
        public void RockWinsLizard()
        {
            var rock = new Rock();
            var lizard = new Lizard();

            Assert.IsTrue(rock.Defeat(lizard));
        }
        public void RockLostPaper()
        {
            var rock = new Rock();
            var paper = new Paper();

            Assert.IsFalse(rock.Defeat(paper));
        }