public async Task CreateFolderAsync_CreatesFolderOnDisk()
{
string result = null;
var project = UnconfiguredProjectFactory.Create(filePath: @"C:\Root.csproj");
var fileSystem = IFileSystemFactory.ImplementCreateDirectory((path) => { result = path; });
var storage = CreateInstance(fileSystem: fileSystem, project: project);
await storage.CreateFolderAsync("Folder");
Assert.Equal(@"C:\Folder", result);
}