public void MarketRule_IsSatisfied_When_No_Other_Markets()
        {
            //add randomly 100 residences
            IRoad road   = _settlement.Roads.First();
            var   market = new Market()
            {
                Position = new Point(50, 51)
            };

            market.Road = road;
            _settlement.AddBuildingToRoad(road, market);

            while (_settlement.Roads.SelectMany(g => g.Buildings).Count() < 120)
            {
                var buildingPositions = road.GetPossibleBuildingPositions(new PossibleBuildingPositions(_settlement.Roads, _settlement.Fields));
                if (!buildingPositions.Any())
                {
                    continue;
                }

                var building = new Residence {
                    Position = buildingPositions[RandomProvider.Next(buildingPositions.Count)]
                };
                building.Road = road;
                _settlement.AddBuildingToRoad(road, building);
            }


            Assert.AreEqual(5, market.CalculateFitness(new BuildingRule()
            {
                BuildingRoad     = road,
                Fields           = _settlement.Fields,
                Roads            = _settlement.Roads,
                SettlementCenter = _settlement.SettlementCenter
            }));
        }