public void TestGetAllRooms()
{
Room room1 = new Room();
Room room2 = new Room();
Room room3 = new Room();
System.Collections.Generic.List <Room> rooms = new System.Collections.Generic.List <Room> {
room1, room2, room3
};
HouseManager manager = new HouseManager(rooms);
System.Collections.Generic.List <Room> allRooms = manager.GetAllRooms();
Assert.IsInstanceOf <System.Collections.Generic.List <Room> >(allRooms);
Assert.That(allRooms, Has.Count.EqualTo(3));
}