Skip nexus tests under java test server

Author: dandavison

tests/hello_nexus/hello_nexus_test.py

@@ -1,14 +1,18 @@
 import asyncio
 
+import pytest
 from temporalio.client import Client
+from temporalio.testing import WorkflowEnvironment
 
 import hello_nexus.caller.app
 import hello_nexus.caller.workflows
 import hello_nexus.handler.worker
 from tests.hello_nexus.helpers import create_nexus_endpoint, delete_nexus_endpoint
 
 
-async def test_nexus_service_basic(client: Client):
+async def test_nexus_service_basic(client: Client, env: WorkflowEnvironment):
+    if env.supports_time_skipping:
+        pytest.skip("Nexus tests don't work under the Java test server")
     create_response = await create_nexus_endpoint(
         name=hello_nexus.caller.workflows.NEXUS_ENDPOINT,
         task_queue=hello_nexus.handler.worker.TASK_QUEUE,