'Fail silently when a variable\'s attribute isn\'t found.'

@setup({'basic-syntax11': '{{    var.blech    }}'})
def test_basic_syntax11(self):

    output = self.engine.render_to_string('basic-syntax11', {'var': SomeClass()})
    if self.engine.string_if_invalid:
        self.assertEqual(output, 'INVALID')
    else:
        self.assertEqual(output, '')
