单元测试未涵盖的 LINQ`Any`

Question

我有这个方法：

/// <summary>
/// Moves piece to location, does not verify that this is a valid move
/// </summary>
/// <param name="dest"></param>
public virtual void Move(Coordinate dest)
{
    if (Board.IsPieceAtLocation(dest))
    {
        if (GetAllPossibleKills().Any(p => p.BoardLocation == dest))
        {
            Board.KillPieceAtLocation(dest);
        }
        else
        {
            throw new LocationOccupiedException("Board location already occupied and kill is not valid",this, Board.GetPieceAtLocation(dest));
        }
    }
    BoardLocation = dest;
}

它包含在两个单元测试中：

[Test]
public void LocationOccupiedTest()
{
    Board board = new Board();
    board.GenerateNewGamePieces();
    Assert.Throws<LocationOccupiedException>(()=>board.GetKing(false).Move(new Coordinate(0,0)));
}

[Test]
public void KillPieceTest()
{
    Board board = new Board();
    board.GenerateNewGamePieces();
    Piece knight = board.GetPieceAtLocation(new Coordinate(1, 0));
    knight.Move(new Coordinate(1,4));
    Assert.DoesNotThrow(()=>knight.Move(new Coordinate(0,6)));
}

根据覆盖率分析，整个方法都被覆盖了，除了：

if (GetAllPossibleKills().Any(p => p.BoardLocation == dest))

您可以在每行代码旁边看到覆盖状态：

鉴于遍历了 if 语句的两个分支，我不明白怎么会这样。

我怎样才能得到这个？

Answer 1

我怀疑问题是您没有测试 Any.

所有可能的执行路径

您可能需要添加额外的测试用例以确保您涵盖（例如）存在其他有效目标时的非法移动（感谢示例@Persistence）。

要修复此特定示例，您需要添加一个测试用例，以便在存在其他有效杀戮目标时移动到不是有效杀戮目标的占用 space。

[Test]
public void MoveToOccupiedWithOtherValidTargets()
{
    Board board = new Board();
    board.GenerateNewGamePieces();
    Piece king = board.GetKing(true);
    king.Move(new Coordinate(0,5));
    board.GetPieceAtLocation(new Coordinate(0,1)).Move(new Coordinate(0,4));
    Assert.Throws<LocationOccupiedException>(()=>king.Move(new Coordinate(0,4)));
}

单元测试未涵盖的 LINQ`Any`

LINQ `Any` not covered by unit test

c#

linq

nunit

code-coverage

unity3d