def test_update(self):
"""Ensure that update works"""
tree = DotDict({'foo': 'bar'})
tree.update({'foo': {}})
self.assertIsInstance(tree.foo, DotDict)
tree.update(bar={})
self.assertIsInstance(tree.bar, DotDict)
tree.update([['baz', {}]])
self.assertIsInstance(tree.baz, DotDict)
