public void FindForItem_FirstDestinationIsWalkableAndUnoccupied_ReturnsFirstDestination()
{
var checkedPosition = new Position(1, 1);
IGrid gip = Mock.Of <IGrid>(p => p.IsWalkable(checkedPosition) == true);
IEntityDetector entityDetector = Mock.Of <IEntityDetector>(d =>
d.DetectEntities(checkedPosition) == Enumerable.Empty <GameEntity>());
var finder = new FirstPlaceInAreaFinder(gip, entityDetector, new RandomNumberGenerator(93432));
Position?result = finder.FindForItem(checkedPosition);
result.Should().Be(checkedPosition);
}
public void FindForItem_NoNeighboursAndFirstDestinationIsUnoccupiedButWalkable_ReturnsFailure()
{
var checkedPosition = new Position(1, 1);
IGrid gip = Mock.Of <IGrid>(p => p.IsWalkable(It.IsAny <Position>()) == false);
IEntityDetector entityDetector = Mock.Of <IEntityDetector>(d =>
d.DetectEntities(checkedPosition) == Enumerable.Empty <GameEntity>());
var finder = new FirstPlaceInAreaFinder(gip, entityDetector, new RandomNumberGenerator(93432));
Position?result = finder.FindForItem(checkedPosition);
result.Should().BeNull();
}
public void FindForItem_FirstDestinationAndMostNeighboursAreNotEligibleButOneNeighbourIs_ReturnsNeighbour()
{
var checkedPosition = new Position(1, 1);
var eligibleNeighbour = new Position(2, 1);
IGrid gip = Mock.Of <IGrid>(p =>
p.IsWalkable(
It.Is <Position>(v => PositionUtilities.Neighbours8(checkedPosition).Contains(v))
) == false &&
p.IsWalkable(eligibleNeighbour) == true);
IEntityDetector entityDetector = Mock.Of <IEntityDetector>(d =>
d.DetectEntities(checkedPosition) == Enumerable.Empty <GameEntity>());
var finder = new FirstPlaceInAreaFinder(gip, entityDetector, new RandomNumberGenerator(93432));
Position?result = finder.FindForItem(checkedPosition);
result.Should().Be(eligibleNeighbour);
}