Convenience functionality on top of System.IO.Abstractions

dotnet add package TestableIO.System.IO.Abstractions.Extensions

Examples

CurrentDirectory extension

var fs = new FileSystem();

//with extension
var current = fs.CurrentDirectory();

//without extension
var current =  fs.DirectoryInfo.FromDirectoryName(fs.Directory.GetCurrentDirectory());

SubDirectory extension

var current = new FileSystem().CurrentDirectory();

//create a "temp" subdirectory with extension
current.SubDirectory("temp").Create();

//create a "temp" subdirectory without extension
current.FileSystem.DirectoryInfo.FromDirectoryName(current.FileSystem.Path.Combine(current.FullName, "temp")).Create();

File extension

var current = new FileSystem().CurrentDirectory();

//create a "test.txt" file with extension
using (var stream = current.File("test.txt").Create())
    stream.Dispose();

//create a "test.txt" file without extension
using (var stream = current.FileSystem.FileInfo.FromFileName(current.FileSystem.Path.Combine(current.FullName, "test.txt")).Create())
    stream.Dispose();

Automatic cleanup with Disposable extensions

Use CreateDisposableDirectory or CreateDisposableFile to create a IDirectoryInfo or IFileInfo that's automatically deleted when the returned IDisposable is disposed.

var fs = new FileSystem();

//with extension
using (fs.CreateDisposableDirectory(out IDirectoryInfo dir))
{
    Console.WriteLine($"This directory will be deleted when control leaves the using block: '{dir.FullName}'");
}

//without extension
var temp = fs.Path.GetTempPath();
var fileName = fs.Path.GetRandomFileName();
var path = fs.Path.Combine(temp, fileName);

try
{
    IDirectoryInfo dir = fs.Directory.CreateDirectory(path);
    Console.WriteLine($"This directory will be deleted in the finally block: '{dir.FullName}'");
}
finally
{
    fs.Directory.Delete(path, recursive: true);
}

IDirectoryInfo.CopyTo extension

var fs = new FileSystem();
var current = fs.CurrentDirectory();

//source
var source =  current.SubDirectory("source");
source.Create(); //make sure the source directory exists

//destination
var dest = current.SubDirectory("destination");

//copy
source.CopyTo(dest, recursive: true);