public void Item_RegisterForExternal_Works()
{
EquipmentItem sut = new EquipmentItem();
sut.MakeExternalInstallsPermitted();
ValidateFitPosition(sut, MountPoint.Forward);
ValidateFitPosition(sut, MountPoint.Backward);
ValidateFitPosition(sut, MountPoint.Nearside);
ValidateFitPosition(sut, MountPoint.Offside);
}