def test_get_value_from_instance_with_unknown_attr(self):
class Dummy:
attr1 = "foo"
field = DEDField(attr="attr2")
self.assertRaises(VariableLookupError, field.get_value_from_instance,
Dummy())
def test_get_value_from_lazy_object(self):
field = DEDField(attr="translation")
instance = NonCallableMock(translation=_("foo"))
self.assertIsInstance(field.get_value_from_instance(instance),
string_types)
self.assertEqual(field.get_value_from_instance(instance), "foo")
def test_get_value_from_none(self):
field = DEDField(attr="related.none")
instance = NonCallableMock(attr1="foo", related=None)
self.assertEqual(field.get_value_from_instance(instance), None)
def test_get_value_from_instance_related_callable(self):
field = DEDField(attr="related.callable")
instance = NonCallableMock(related=NonCallableMock(
callable=Mock(return_value="bar"), attr1="foo"))
self.assertEqual(field.get_value_from_instance(instance), "bar")
def test_get_value_from_instance_related_attr(self):
field = DEDField(attr="related.attr1")
instance = NonCallableMock(attr1="foo",
related=NonCallableMock(attr1="bar"))
self.assertEqual(field.get_value_from_instance(instance), "bar")
def test_get_value_from_instance_attr(self):
field = DEDField(attr="attr1")
instance = NonCallableMock(attr1="foo", attr2="bar")
self.assertEqual(field.get_value_from_instance(instance), "foo")
def test_attr_to_path(self):
field = DEDField(attr="field")
self.assertEqual(field._path, ["field"])
field = DEDField(attr="obj.field")
self.assertEqual(field._path, ["obj", "field"])