def test_reference_tasks(): x = Task("x") y = Task("y") z = Task("z") f = Flow(name="test", tasks=[x, y, z]) f.set_reference_tasks([y]) assert f.reference_tasks() == {y} f2 = FlowSchema().load(FlowSchema().dump(f)) assert f2.reference_tasks() == {t for t in f2.tasks if t.name == "y"}
def test_flow_run_state_determined_by_reference_tasks(): flow = Flow(name="test") t1 = ErrorTask() t2 = SuccessTask(trigger=prefect.triggers.all_finished) flow.add_edge(t1, t2) flow.set_reference_tasks([t1]) flow_state = flow.run() assert isinstance(flow_state, Failed) assert isinstance(flow_state.result[t1], Failed) assert isinstance(flow_state.result[t2], Success)
def test_flow_run_state_not_determined_by_reference_tasks_if_terminal_tasks_are_not_finished(): flow = Flow(name="test") t1 = ErrorTask() t2 = RaiseRetryTask(trigger=prefect.triggers.all_finished) flow.add_edge(t1, t2) flow.set_reference_tasks([t1]) flow_state = FlowRunner(flow=flow).run(return_tasks=flow.tasks) assert flow_state.is_running() assert flow_state.result[t1].is_failed() assert flow_state.result[t2].is_retrying()
def test_serialize_flow_sorts_nested_schemas(): a = Parameter("a", default=1) b = Parameter("b", default=2) c = Task("c") d = Task("d") f = Flow("test") d.set_upstream(c, flow=f) c.set_upstream(b, flow=f).set_upstream(a, flow=f) f.set_reference_tasks([d, c]) # Must use `f.serialize` instead of `FlowSchema().dump` because task slugs # are not guaranteed to be set yet serialized = f.serialize() assert [param["slug"] for param in serialized["parameters"]] == ["a", "b"] assert [task["slug"] for task in serialized["tasks"]] == ["a", "b", "c-1", "d-1"] assert [ (edge["upstream_task"]["slug"], edge["downstream_task"]["slug"]) for edge in serialized["edges"] ] == [("a", "c-1"), ("b", "c-1"), ("c-1", "d-1")] assert [task["slug"] for task in serialized["reference_tasks"]] == ["c-1", "d-1"]