2016-08-01 106 views
0

我試圖單元測試遞歸表示目錄結構的對象,但即使在最簡單的級別FluentAssertions ShouldBeEquivalentTo失敗最大遞歸深度達到FluentAssertions遞歸深度到達與遞歸結構的對象

應該如何寫這個測試來正確地讓測試通過。

此外,如果添加子節點,我如何停止無限重新比較父節點DirectoryNode

這裏是代碼,它使用Xunit,FluentAssertionsSystem.IO.Abstractions庫。

測試:

[Fact] 
public void DirectoryTreeBuilder_BuildTree_String_TopNodeTest() 
{ 
    // Arrange 
    string path = "C:\\"; 

    var mockFileSystem = new MockFileSystem(); 
    mockFileSystem.AddDirectory(path); 

    var expected = new DirectoryNode 
    { 
     Info = mockFileSystem.DirectoryInfo.FromDirectoryName(path), 
     Children = new List<DirectoryNode>() 
    }; 

    // Act 
    var builder = new DirectoryTreeBuilder(mockFileSystem); 
    var calculated = builder.BuildTree(path); 

    // Assert 
    calculated.ShouldBeEquivalentTo(expected); 
} 

DirectoryNode屬性的類:

public class DirectoryNode 
{ 
    public DirectoryNode Parent { get; set; } 
    public DirectoryInfoBase Info { get; set; } 
    public List<DirectoryNode> Children { get; set; } 
    public List<FileInfoBase> Files => Info.GetFiles().ToList(); 
} 

樹構建:

public class DirectoryTreeBuilder 
{ 
    private readonly IFileSystem fileSystem; 

    public DirectoryTreeBuilder(IFileSystem fileSystem) 
    { 
     this.fileSystem = fileSystem; 
    } 

    public DirectoryTreeBuilder() : this(new FileSystem()) 
    { 
    } 

    public DirectoryNode BuildTree(string path) 
    { 
     var directoryInfo = fileSystem.DirectoryInfo.FromDirectoryName(path); 

     return BuildTree(directoryInfo); 
    } 

    public DirectoryNode BuildTree(DirectoryInfoBase directoryInfo) 
    { 
     var node = new DirectoryNode 
     { 
      Info = directoryInfo, 
     }; 

     var directories = directoryInfo.GetDirectories(); 
     var children = new List<DirectoryNode>(); 

     // Process list of child directories 
     foreach (var directory in directories) 
     { 
      var child = BuildTree(directory); 
      child.Parent = node; 

      children.Add(child); 
     } 

     node.Children = children; 

     return node; 
    } 
} 
+0

你有超過十級的目錄嗎?你嘗試過'AllowingInfiniteRecursion'選項嗎? – dasblinkenlight

+0

@dasblinkenlight目錄結構可能有10個以上的級別;但對於測試我沒有那麼多。我嘗試了'AllowingInfiniteRecursion',但是這會導致進程最終意外中止(這個測試不應該被需要)。 – Ayb4btu

回答

0

我發現的問題,DirectoryNode.Info屬性包含DirectoryInfoBase這僅僅是一個包裝爲DirectoryInfo對象。

DirectoryInfo有屬性Root它在最高級別(如C:\)將只返回自己。這是FluentAssertions ShouldBeEquivalentTo遞歸失敗的元素。

不幸的是,似乎ShouldBeEquivalentTo可以忽略子屬性。