def METHOD_NAME(self):
    edge = Edge('from', 'to', 'relation', True, {'metaNumber': 11, 'metaString': 'hello world'})
    self.assertEqual(edge.get_source(), 'from')
    self.assertEqual(edge.get_target(), 'to')
    self.assertEqual(edge.get_relation(), 'relation')
    self.assertTrue(edge.is_directed())
    self.assertEqual(edge.get_metadata()['metaNumber'], 11)
    self.assertEqual(edge.get_metadata()['metaString'], 'hello world')