IO0004.MD

IO0004. Replace FileInfo class with IFileSystem.FileInfo for improved testability

Topic	Value
Id	IO0004
Severity	Warning
Enabled	True
Category	System.IO.Abstractions

Description

Replace FileInfo class with IFileSystem.FileInfo for improved testability

Code with Diagnostic

using System.IO.Abstractions;

namespace SomeNameSpace
{
	public class WithOutFileSystem
	{
		private readonly IFileSystem _fileSystem;

		public WithOutFileSystem(IFileSystem fileSystem)
		{
			_fileSystem = fileSystem;
		}

		public void SomeMethod()
		{
			const string filePath = "C:\\temp.txt";

			FileInfo fileInf = new FileInfo(filePath);
		}
	}
}

Code with Fix

using System.IO.Abstractions;

namespace SomeNameSpace
{
	public class WithOutFileSystem
	{
		private readonly IFileSystem _fileSystem;

		public WithOutFileSystem(IFileSystem fileSystem)
		{
			_fileSystem = fileSystem;
		}

		public void SomeMethod()
		{
			const string filePath = "C:\\temp.txt";

			FileInfo fileInf = _fileSystem.FileInfo.FromFileName(filePath);
		}
	}
}