public void BuildFlaten()
        {
            RollerCoasterMaker game = new RollerCoasterMaker();

            for (int i = 0; i < 4; i++)
            {
                game.BuildUp();
            }

            for (int i = 0; i < 10; i++)
            {
                game.BuildStright();
            }
            game.BuildFlaten();

            Assert.AreEqual(false, game.builder.lastBuildActionFail);
        }