Failing test for #3975 regression

tests/py/test_db_checks.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+from __future__ import absolute_import, division, print_function, unicode_literals
+
+from gratipay import models
+from gratipay.testing import Harness
+
+
+class Tests(Harness):
+
+    # cb - _check_balances - calls assert so we don't need asserts here
+
+    def test_cb_is_fine_with_empty_database(self):
+        with self.db.get_cursor() as cursor:
+            models._check_balances(cursor)
+
+    def test_cb_is_fine_with_status_unknown(self):
+        alice = self.make_participant('alice', balance=49)
+        self.make_exchange('braintree-cc', 49, 0, alice, status='unknown')
+        with self.db.get_cursor() as cursor:
+            models._check_balances(cursor)