chore: import upstream snapshot with attribution

libs/langgraph/tests/test_managed_values.py

@@ -0,0 +1,27 @@
+from typing_extensions import NotRequired, Required, TypedDict
+
+from langgraph.graph import StateGraph
+from langgraph.managed import RemainingSteps
+
+
+class StatePlain(TypedDict):
+    remaining_steps: RemainingSteps
+
+
+class StateNotRequired(TypedDict):
+    remaining_steps: NotRequired[RemainingSteps]
+
+
+class StateRequired(TypedDict):
+    remaining_steps: Required[RemainingSteps]
+
+
+def test_managed_values_recognized() -> None:
+    graph = StateGraph(StatePlain)
+    assert "remaining_steps" in graph.managed
+
+    graph = StateGraph(StateNotRequired)
+    assert "remaining_steps" in graph.managed
+
+    graph = StateGraph(StateRequired)
+    assert "remaining_steps" in graph.managed