public void DirectoryManipulation()
        {
            using var pfs = new PhysFS("");
            pfs.SetWriteDir("./");
            pfs.GetWriteDir().Should().Be("./");

            pfs.CreateDirectory("hello");
            Directory.Exists("./hello").Should().BeTrue();

            pfs.Delete("hello");
            Directory.Exists("./hello").Should().BeFalse();
        }