def test_promise_error_is_propagated(self):
generate_classic(self.session)
g = DseGraph().traversal_source(self.session,
'wrong_graph',
execution_profile=self.ep)
traversal_future = g.V().has(
'name', 'marko').out('knows').values('name').promise()
with self.assertRaises(Exception):
traversal_future.result()
def _test_promise_callback_on_error(self, schema, graphson):
self.execute_graph(schema.fixtures.classic(), graphson)
g = DseGraph().traversal_source(self.session, 'wrong_graph', execution_profile=self.ep)
future = Future()
def cb(f):
try:
f.result()
except Exception as e:
future.set_exception(e)
traversal_future = g.V().has('name', 'marko').out('knows').values('name').promise()
traversal_future.add_done_callback(cb)
with self.assertRaises(Exception):
future.result()