Fix test as full_address is a Function field

The address must be saved to be allowed to use the function field.
And the split lines should be join by empty space

address.py

@@ -20,7 +20,7 @@ class Address:
     @fields.depends('street', 'zip', 'city', 'country', 'subdivision')
     def on_change_with_google_maps_url(self, name=None):
         lang = Transaction().language[:2]
-        url = ''.join(self.full_address.splitlines())
+        url = ' '.join(self.full_address.splitlines())
         if url.strip():
             if isinstance(url, str) and sys.version_info < (3,):
                 url = url.encode('utf-8')

tests/test_google_maps.py

@@ -15,10 +15,15 @@ class GoogleMapsTestCase(ModuleTestCase):
         "Test Google Maps URL"
         pool = Pool()
         Address = pool.get('party.address')
+        Party = pool.get('party.party')
+        party = Party()
+        party.save()
         address = Address()
+        address.party = party
         address.street = "300 Cliff Street"
         address.zip = "18503"
         address.city = "Scranton"
+        address.save()
 
         self.assertEqual(
             address.on_change_with_google_maps_url(),