TST: more precise test for deeply nested properties

tests/test_issues_server.py

@@ -101,12 +101,14 @@ def test_issue_62():
     # renaming has to be reflected in Test_Record and Test_Prop
     rec = db.execute_query("FIND Record Test_Record", unique=True)
     assert rec.parents[0].name == rtb.name
+    assert rec.get_property("Test_Prop").datatype == rtb.name
     prop = db.execute_query("FIND Property Test_Prop", unique=True)
     assert prop.datatype == rtb.name  # fails; datatype not updated
     # Can't use Test_RTA as datatype anymore
     prop2 = db.Property(name="Test_Prop2", datatype="Test_RTA")
-    with pytest.raises(TransactionError):
+    with pytest.raises(TransactionError) as exc:
         prop2.insert()
+    assert "Unknown data type." in str(exc.value)
 
 
 def test_issue_85_a():