allow route-id to be optional

tests/test_edocument.py

@@ -11,12 +11,41 @@ from datetime import date
 from trytond.tests.test_tryton import ModuleTestCase, with_transaction
 from trytond.pool import Pool
 from trytond.modules.edocument_uncefact.tests.test_module import get_invoice
+from trytond.exceptions import UserError
 
 
 class EdocTestCase(ModuleTestCase):
     'Test e-rechnung module'
     module = 'edocument_xrechnung'
 
+    @with_transaction()
+    def test_xrechn_check_validator(self):
+        """ check validation of optional route-id
+        """
+        Party = Pool().get('party.party')
+
+        party, = Party.create([{'name': 'P1'}])
+        self.assertEqual(party.xrechnung_routeid, False)
+
+        Party.write(*[
+            [party],
+            {
+                'xrechnung_routeid': True,
+                'identifiers': [('create', [{
+                    'type': 'edoc_route_id',
+                    'code': '1234'}])]}])
+        self.assertEqual(party.xrechnung_routeid, True)
+        self.assertEqual(party.get_xrechnung_route_id(), '1234')
+
+        self.assertRaisesRegex(
+            UserError,
+            "No XRechnung routing ID is stored for the party 'P1'.",
+            Party.write,
+            *[
+                [party],
+                {'identifiers': [('delete', [party.identifiers[0].id])]}]
+            )
+
     @with_transaction()
     def test_xrechn_export_xml_invoice(self):
         """ run export - invoice