public void Deve_adicionar_5_gols_para_kaka()
        {
            // Dado / Setup
            var kaka = new Player("Kaka");

            // Quando / Ação
            kaka.AddGoal();
            kaka.AddGoal();
            kaka.AddGoal();
            kaka.AddGoal();
            kaka.AddGoal();

            // Deve / Asserções
            Assert.Equal(5, kaka.Goals);
            Assert.Equal(0, kaka.GoalsAgainst);
        }