using System;

using System.IO.Abstractions;

using System.IO.Abstractions.TestingHelpers;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        //Arrange

        IFileSystem fileSystem = new MockFileSystem(new Dictionary<string, MockFileData>

        {

            { @"c:\myfile.txt", new MockFileData("Testing is meh.") },

            { @"c:\demo\jQuery.js", new MockFileData("some js") },

            { @"c:\demo\image.gif", new MockFileData(new byte[] { 0x12, 0x34, 0x56, 0xd2 }) }

        }) as IFileSystem;

        //Act

        var browser = new FileBrowser(fileSystem);

        //Assert

    }

}

​

public interface IFileBrowser

{

    IDiskItem ToDiskItem(string path);

}

​

public class FileBrowser : IFileBrowser

{

    public FileBrowser() : this(new FileSystem())

    { // Default to Systen.IO

    }

    IFileSystem fileSystem;

    public FileBrowser(IFileSystem fileSystem)

    {

        this.fileSystem = fileSystem;

    }

    public IDiskItem ToDiskItem(string path)

    {

        DiskItem diskItem = new DiskItem(fileSystem, fileSystem.Path.GetFileName(path), path, ItemType.Directory);

        return diskItem;

    }

}

​

public interface IDiskItem

{

    string Name{get;}

    string Path{get;}

    ItemType DiskItemType{get;}

    List<IDiskItem> GetDiskItemList(); // TODO: How to implement a filter?

}

​

​

public class DiskItem : IDiskItem

{

    public string Name{get; private set;}

    public string Path {get; private set;}

    public ItemType DiskItemType{get; private set;}

    private IFileSystem fileSystem;

    public DiskItem(string name, string path, ItemType diskItemType) : this(new FileSystem(), name, path, diskItemType)

    { // Default to using System.IO

    }

    public DiskItem(IFileSystem fileSystem, string name, string path, ItemType diskItemType)

    {

        this.Name = name;

        this.Path = path;

        this.DiskItemType = diskItemType;

        this.fileSystem = fileSystem;

    }

    public List<IDiskItem> GetDiskItemList()

    {

        string[] pathToAllDirectories = fileSystem.Directory.GetDirectories(Path);

        string[] pathToAllFiles = fileSystem.Directory.GetFiles(Path);

        List<IDiskItem> listResult = new List<IDiskItem>();

        foreach(string dir in pathToAllDirectories)

        {

            listResult.Add(new DiskItem(fileSystem, fileSystem.Path.GetFileName(Path), Path, ItemType.Directory));

        }

        foreach(string f in pathToAllFiles)

        {

            listResult.Add(new DiskItem(fileSystem, fileSystem.Path.GetFileName(Path), Path, ItemType.File));

        }

        return listResult;

    }

}

​

​

public enum ItemType{Directory, File}

​

​