def test_file_writing(self):
s = ConfigSettings()
s.register_provider(Provider2)
s.a.string = 'foo'
s.a.boolean = False
temp = NamedTemporaryFile('wt')
s.write(temp)
temp.flush()
s2 = ConfigSettings()
s2.register_provider(Provider2)
s2.load_file(temp.name)
self.assertEqual(s.a.string, s2.a.string)
self.assertEqual(s.a.boolean, s2.a.boolean)
