From b1843ce781893b1bc81c061702f2a96a3805345a Mon Sep 17 00:00:00 2001
From: Dion Moult <dion@thinkmoult.com>
Date: Mon, 27 Mar 2023 17:36:06 +1100
Subject: [PATCH] Fix IfcTester bug which did not consider null enumeration
 values

---
 src/ifctester/ifctester/facet.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/ifctester/ifctester/facet.py b/src/ifctester/ifctester/facet.py
index eb81badc34..7ede3430a7 100644
--- a/src/ifctester/ifctester/facet.py
+++ b/src/ifctester/ifctester/facet.py
@@ -555,6 +555,10 @@ class Property(Facet):
                                 ifcopenshell.util.unit.si_type_names[unit.UnitType],
                             )
                     elif prop_entity.is_a("IfcPropertyEnumeratedValue"):
+                        if not prop_entity.EnumerationValues:
+                            is_pass = False
+                            reason = {"type": "NOVALUE"}
+                            break
                         data_type = prop_entity.EnumerationValues[0].is_a()
                         if data_type != self.measure:
                             is_pass = False