Test edit object placement. See #1711

src/ifcopenshell-python/test/api/unit/test_add_si_unit.py

@@ -0,0 +1,10 @@
+import test.bootstrap
+import ifcopenshell.api
+
+
+class TestAddSIUnit(test.bootstrap.IFC4):
+    def test_run(self):
+        unit = ifcopenshell.api.run("unit.add_si_unit", self.file, unit_type="LENGTHUNIT", name="METRE", prefix="MILLI")
+        assert unit.UnitType == "LENGTHUNIT"
+        assert unit.Name == "METRE"
+        assert unit.Prefix == "MILLI"