public void ToString_Formatting()
{
Position position = new Position(43, -31);
Assert.AreEqual("43 -31", position.ToString());
}
public void Constructor_WithourParameters_RowShouldBeZero()
{
Position position = new Position();
Assert.AreEqual(0, position.Row);
}
public void Constructor_WithoutParameters_ColumnShouldBeZero()
{
Position position = new Position();
Assert.AreEqual(0, position.Column);
}
public void Constructor_WhenColumnIs5()
{
Position position = new Position(3, 5);
Assert.AreEqual(5, position.Column);
}
public void Constructor_WhenRowIs5()
{
Position position = new Position(5, 3);
Assert.AreEqual(5, position.Row);
}
private bool TryFindEmptyCell(out Position emptyCell)
{
emptyCell = new Position(0, 0);
for (int i = 0; i < this.Dimension; ++i)
{
for (int j = 0; j < this.Dimension; ++j)
{
if (this.matrix[i, j] == Matrix.EmptyCell)
{
emptyCell.Row = i;
emptyCell.Column = j;
return true;
}
}
}
return false;
}
private void VisitCell(Position position)
{
this.matrix[position.Row, position.Column] = this.nextCellValue;
this.nextCellValue++;
}
private bool IsInsideBoundaries(Position position)
{
return position.Row < this.Dimension
&& position.Column < this.Dimension
&& position.Row >= 0
&& position.Column >= 0;
}
private bool IsEmptyCell(Position position)
{
return this.matrix[position.Row, position.Column] == Matrix.EmptyCell;
}
private bool HasEmptyNeighbour(Position position)
{
foreach (var direction in this.coordinatesOfDirection)
{
Position neighbor = this.GetNeighborCell(position, direction.Key);
if (this.IsInsideBoundaries(neighbor) && this.IsEmptyCell(neighbor))
{
return true;
}
}
return false;
}
private Position GetNeighborCell(Position position, Direction direction)
{
Position neighbor = new Position();
Position directionCoordinates = this.coordinatesOfDirection[direction];
neighbor.Row = position.Row + directionCoordinates.Row;
neighbor.Column = position.Column + directionCoordinates.Column;
return neighbor;
}
private Direction GetFirstClockwiseEmptyCell(Position position, Direction direction)
{
Position neighbor = this.GetNeighborCell(position, direction);
Direction neighborDirection = direction;
while (!this.IsInsideBoundaries(neighbor) || !this.IsEmptyCell(neighbor))
{
neighborDirection = this.GetClockwiseRotatedDirection(neighborDirection);
neighbor = this.GetNeighborCell(position, neighborDirection);
}
return neighborDirection;
}
