public void TestMethod5()
{
Food tea = new Tea();
Food pie = new Pie();
double tr = pie.cost() + tea.cost();
Facade facade1 = new Facade();
double tr1 = facade1.SweetPieMenu(tr);
Assert.AreEqual(tr1, 2.975);
Assert.IsNotNull(tr);
Assert.IsNotNull(tr1);
}