public void FindByFirstnameTest() { //Arrange People people = new People(); ToDoItems toDo = new ToDoItems(); PersonSequencer.Reset(); TodoSequencer.ResetID(); Person Jane = people.AddNewPerson(1, "Jane", "Doe"); Person John = people.AddNewPerson(2, "John", "Doe"); ToDo item1 = toDo.AddNewToDoNew(1, "Win lotto", false, Jane); ToDo item2 = toDo.AddNewToDoNew(2, "Learn to code", false, John); //Act ToDo[] result = toDo.FindByFirstname(Jane); ToDo[] result2 = toDo.FindByFirstname(John); //Assert Assert.Contains(item1, result); Assert.Contains(item2, result2); }