ToolBX.NetAbstractions 1.0.0

NetAbstractions

Abstractions for .NET base types such as File and Directory to provide easier means to mock low-level operations.

For some strange and obscure reason, Microsoft thought it was a good idea to have unmockable static classes for most low-level operations such as deleting files and folders. Suppose you want to test a method that checks whether a file exists and delete it if it does? You could create temporary files to be used with your tests. It could work but it would also needlessly complexify your tests’ logic. You might also be tempted to just not test that method. It’s fine if you don’t care about code quality. It’s okay, I’m not judging (I am.)

Using this library, you can do the following:

public class ShadyService : IShadyService
{
	private readonly IFile _file;

	public ShadyService(IFile file)
	{
		_file = file;
	}

	public void DoTheThing(string path)
	{
		if (_file.Exists(path))
			_file.Delete(path);
	}
}

Getting started

Thankfully, NetAbstractions uses AutoInject to inject all those wrappers for you. You do still need to call this one line :

public void ConfigureServices(IServiceCollection services)
{
    services.AddAutoInjectServices();
}

See AutoInject's repo for more info

You can also add them one by one if that's what you want but that would be weird.