public void SlotAttachedTo_TestSegFirstSlot_ReturnsNullSlotPtr() { using (var seg = new PaduakDisposableTestSegment("hello world")) { IntPtr firstSlot = Graphite2Api.SegFirstSlot(seg.Seg); IntPtr parentSlot = Graphite2Api.SlotAttachedTo(firstSlot); Assert.AreEqual(IntPtr.Zero, parentSlot); } }