TST: add failing test for https://gitlab.com/caosdb/caosdb-server/-/issues/178

tests/test_version.py

@@ -429,6 +429,7 @@ def test_bug_parent_name_in_old_version():
     assert [OLD_NAME] == [p.name for p in rec_v1.get_parents()]
 
 
+@mark.xfail(reason="fix https://gitlab.com/caosdb/caosdb-server/-/issues/178")
 def test_reference_deleted_in_old_version():
     ref_rt = insertion("TestReferencedObject")
     rt = insertion("TestRT")
@@ -491,14 +492,23 @@ def test_reference_deleted_in_old_version():
     assert test_rec.get_property(ref_rt) is None
     assert test_rec.version.predecessors[0].id == old_version
 
-    # retrieve old version again. the reference (to the now deleted entity)
-    # is still there.
+    # retrieve old version again (cache on). the reference (to the now deleted
+    # entity) is still there.
     old_rec = c.Container().retrieve(str(test_rec.id) + "@HEAD~1",
                                      sync=False)[0]
     assert old_rec.version.id == old_version
     assert old_rec.version.successors[0].id == test_rec.version.id
     assert old_rec.get_property(p).value == "blablabla"
-    assert old_rec.get_property(ref_rt).value == referenced_id
+    assert old_rec.get_property(ref_rt).value is None, "TODO this fails"
+
+    # retrieve old version again (cache off). the reference (to the now deleted
+    # entity) is NOT there
+    old_rec = c.Container().retrieve(str(test_rec.id) + "@HEAD~1",
+                                     sync=False, flags={"cache": "false"})[0]
+    assert old_rec.version.id == old_version
+    assert old_rec.version.successors[0].id == test_rec.version.id
+    assert old_rec.get_property(p).value == "blablabla"
+    assert old_rec.get_property(ref_rt).value is None
 
     with raises(c.EmptyUniqueQueryError) as exc:
         c.execute_query("FIND ENTITY WITH ID = {}".format(referenced_id),