Skip LangGraph functional API + interrupt tests on Python < 3.11

These features rely on contextvars propagation through asyncio.create_task(),
which is only available in Python 3.11+. On 3.10 they hang rather than fail
cleanly, so CI sat for an hour before today's fix landed.

Mirrors the pytestmark skipif used in sdk-python's own contrib/langgraph
tests.

Author: DABH

tests/langgraph_plugin/functional_continue_as_new_test.py

@@ -1,6 +1,8 @@
+import sys
 import uuid
 from datetime import timedelta
 
+import pytest
 from temporalio.client import Client
 from temporalio.contrib.langgraph import LangGraphPlugin
 from temporalio.worker import Worker
@@ -13,6 +15,11 @@
     pipeline_entrypoint,
 )
 
+pytestmark = pytest.mark.skipif(
+    sys.version_info < (3, 11),
+    reason="LangGraph Functional API requires Python >= 3.11 for async context propagation",
+)
+
 
 async def test_functional_continue_as_new(client: Client) -> None:
     """Input 10: 10*2=20 -> 20+50=70 -> 70*3=210."""

tests/langgraph_plugin/functional_control_flow_test.py

@@ -1,5 +1,7 @@
+import sys
 import uuid
 
+import pytest
 from temporalio.client import Client
 from temporalio.contrib.langgraph import LangGraphPlugin
 from temporalio.worker import Worker
@@ -11,6 +13,11 @@
     control_flow_pipeline,
 )
 
+pytestmark = pytest.mark.skipif(
+    sys.version_info < (3, 11),
+    reason="LangGraph Functional API requires Python >= 3.11 for async context propagation",
+)
+
 
 async def test_functional_control_flow(client: Client) -> None:
     task_queue = f"functional-control-flow-test-{uuid.uuid4()}"

tests/langgraph_plugin/functional_hello_world_test.py

@@ -1,5 +1,7 @@
+import sys
 import uuid
 
+import pytest
 from temporalio.client import Client
 from temporalio.contrib.langgraph import LangGraphPlugin
 from temporalio.worker import Worker
@@ -11,6 +13,11 @@
     hello_entrypoint,
 )
 
+pytestmark = pytest.mark.skipif(
+    sys.version_info < (3, 11),
+    reason="LangGraph Functional API requires Python >= 3.11 for async context propagation",
+)
+
 
 async def test_functional_hello_world(client: Client) -> None:
     task_queue = f"functional-hello-test-{uuid.uuid4()}"

tests/langgraph_plugin/functional_human_in_the_loop_test.py

@@ -1,6 +1,8 @@
 import asyncio
+import sys
 import uuid
 
+import pytest
 from temporalio.client import Client
 from temporalio.contrib.langgraph import LangGraphPlugin
 from temporalio.worker import Worker
@@ -12,6 +14,11 @@
     chatbot_entrypoint,
 )
 
+pytestmark = pytest.mark.skipif(
+    sys.version_info < (3, 11),
+    reason="LangGraph Functional API and interrupt() require Python >= 3.11 for async context propagation",
+)
+
 
 async def test_functional_human_in_the_loop_approve(client: Client) -> None:
     task_queue = f"functional-hitl-test-{uuid.uuid4()}"

tests/langgraph_plugin/functional_react_agent_test.py

@@ -1,5 +1,7 @@
+import sys
 import uuid
 
+import pytest
 from temporalio.client import Client
 from temporalio.contrib.langgraph import LangGraphPlugin
 from temporalio.worker import Worker
@@ -11,6 +13,11 @@
     react_agent_entrypoint,
 )
 
+pytestmark = pytest.mark.skipif(
+    sys.version_info < (3, 11),
+    reason="LangGraph Functional API requires Python >= 3.11 for async context propagation",
+)
+
 
 async def test_functional_react_agent(client: Client) -> None:
     task_queue = f"functional-react-agent-test-{uuid.uuid4()}"

tests/langgraph_plugin/human_in_the_loop_test.py

@@ -1,6 +1,8 @@
 import asyncio
+import sys
 import uuid
 
+import pytest
 from temporalio.client import Client
 from temporalio.contrib.langgraph import LangGraphPlugin
 from temporalio.worker import Worker
@@ -10,6 +12,11 @@
     make_chatbot_graph,
 )
 
+pytestmark = pytest.mark.skipif(
+    sys.version_info < (3, 11),
+    reason="langgraph.types.interrupt() requires Python >= 3.11 for async context propagation",
+)
+
 
 async def test_human_in_the_loop_approve(client: Client) -> None:
     task_queue = f"hitl-test-{uuid.uuid4()}"