From 5d954759704c5c06b192e8a0b400d2619d0f88b4 Mon Sep 17 00:00:00 2001
From: Thomas Krijnen <t.krijnen@gmail.com>
Date: Tue, 4 Oct 2022 10:23:27 +0200
Subject: [PATCH] #2471 test case

---
 src/ifcopenshell-python/test/file_gc.py | 81 +++++++++++++++++++++++++
 1 file changed, 81 insertions(+)
 create mode 100644 src/ifcopenshell-python/test/file_gc.py

diff --git a/src/ifcopenshell-python/test/file_gc.py b/src/ifcopenshell-python/test/file_gc.py
new file mode 100644
index 0000000000..a2e51d5746
--- /dev/null
+++ b/src/ifcopenshell-python/test/file_gc.py
@@ -0,0 +1,81 @@
+import gc
+import sys
+import pytest
+import pprint
+import weakref
+import itertools
+import ifcopenshell
+import ifcopenshell.api
+
+
+@pytest.mark.parametrize(
+    "args",
+    itertools.product((0, 1), (0, 1), (0, 1), (0, 1, 2)),
+)
+def test_file_gc(args):
+    do_run_api, do_delete_ref, file_first, api = args
+
+    f = ifcopenshell.file()
+    if api == 0:
+        inst = f.createIfcPerson()
+    elif api in (1, 2):
+        inst = f.createIfcSite()
+
+    r = weakref.ref(f)
+
+    if do_run_api:
+        if api == 0:
+            ifcopenshell.api.run(
+                "attribute.edit_attributes",
+                f,
+                product=inst,
+                attributes={"FamilyName": "Bimson"},
+            )
+        elif api == 1:
+            ifcopenshell.api.run(
+                "pset.add_pset", f, product=inst, name="ePSet_MapConversion"
+            )
+        elif api == 2:
+            pset = f.create_entity(
+                "IfcPropertySet",
+                **{
+                    "GlobalId": ifcopenshell.guid.new(),
+                    "OwnerHistory": ifcopenshell.api.run(
+                        "owner.create_owner_history", f
+                    ),
+                    "Name": "ePSet_MapConversion",
+                }
+            )
+            f.create_entity(
+                "IfcRelDefinesByProperties",
+                **{
+                    "GlobalId": ifcopenshell.guid.new(),
+                    "OwnerHistory": ifcopenshell.api.run(
+                        "owner.create_owner_history", f
+                    ),
+                    "RelatedObjects": [inst],
+                    "RelatingPropertyDefinition": pset,
+                }
+            )
+            del pset
+
+    if file_first:
+        del f
+    else:
+        del inst
+
+    # File should still exist, because we either have a direct ref
+    # or the instance from the file still available
+    assert r()
+
+    if not file_first:
+        del f
+    else:
+        del inst
+
+    # With both deleted we should have no longer access to the file.
+    assert r() is None
+
+
+if __name__ == "__main__":
+    pytest.main(["-sx", __file__])