public GridCoordinate GetShipStart(List <List <BattleshipGridCell> > grid, BattleShip ship)
{
var nextShipStart = GetRandomGridCell();
while (_detectCollisionService.IsNextShipColliding(grid, ship, nextShipStart))
{
nextShipStart = GetRandomGridCell();
}
return(nextShipStart);
}
public void GetShipStart_ShouldPreventCollisionsWithOtherShips_WhenPlacingNextShip()
{
// arrange
var grid = BattleshipGameState.Empty(gridSize).Grid;
var firstShipStart = new GridCoordinate(1, 2);
grid[firstShipStart.Line][firstShipStart.Column] = BattleshipGridCell.Ship; // place ship on grid
grid[firstShipStart.Line + 1][firstShipStart.Column] = BattleshipGridCell.Ship;
var nextShip = new BattleShip(2, true);
var expected = new GridCoordinate(2, 3);
_randomService.NextCell()
.Returns(firstShipStart, // we randomly got space that is
firstShipStart, // already used by other ships
expected); // until we got proper one
_detectCollisionService.IsNextShipColliding(grid, nextShip, firstShipStart).Returns(true);
_detectCollisionService.IsNextShipColliding(grid, nextShip, expected).Returns(false);
// act
var result = _servceUnderTest.GetShipStart(grid, nextShip);
// assert
Assert.AreEqual(expected, result);
}
