public void DAOMemory_RetriveAll() { IDAO <Person> db = new DAOMemory <Person>(); // Empty List Retrived Assert.IsInstanceOf <List <Person> >(db.RetriveAll()); Assert.NotNull(db.RetriveAll()); db.Create(new Person() { name = "Juan Carlos Sosa Peña", age = 36 }); db.Create(new Person() { name = "Ana Griselda Prada Perez", age = 35 }); // Filled List Retrived Assert.AreEqual(2, db.RetriveAll().Count); }