bool IsFileExists(MockDirectory parent, Span <string> dirs)
{
if (dirs.Length == 0)
{
return(true);
}
if (dirs.Length == 1)
{
return(parent.ContainsFile(dirs[0]));
}
MockDirectory cur;
if (!parent.TryGetDirectory(dirs[0], out cur))
{
return(false);
}
return(IsFileExists(cur, dirs.Slice(1)));
}