Add check for default model access

When group access exists, a default model access should be defined otherwise
all access are given to non group users.

issue4485
review5941002

tests/test_purchase_shipment_cost.py

@@ -4,27 +4,13 @@
 import unittest
 import doctest
 import trytond.tests.test_tryton
-from trytond.tests.test_tryton import test_view, test_depends, test_menu_action
+from trytond.tests.test_tryton import ModuleTestCase
 from trytond.tests.test_tryton import doctest_setup, doctest_teardown
 
 
-class PurchaseShipmentCostTestCase(unittest.TestCase):
+class PurchaseShipmentCostTestCase(ModuleTestCase):
     'Test Purchase Shipment Cost module'
-
-    def setUp(self):
-        trytond.tests.test_tryton.install_module('purchase_shipment_cost')
-
-    def test0005views(self):
-        'Test views'
-        test_view('purchase_shipment_cost')
-
-    def test0006depends(self):
-        'Test depends'
-        test_depends()
-
-    def test0007menu_actions(self):
-        'Test menu actions'
-        test_menu_action('purchase_shipment_cost')
+    module = 'purchase_shipment_cost'
 
 
 def suite():