[python] Add mock API tests for Azure/typespec-azure PR #4959 Spector scenarios (#11410)

Adds Python SDK mock API tests for new Spector scenarios introduced in
[Azure/typespec-azure#4959](Azure/typespec-azure#4959).
- Fixes #11409

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: msyyc <70930885+msyyc@users.noreply.github.com>
Co-authored-by: Yuchao Yan <yuchaoyan@microsoft.com>

Author: Copilot

.chronus/changes/python-spector-tests-arm-optemplate-clientapiversions-2026-7-27-8-55-0.md

@@ -0,0 +1,7 @@
+---
+changeKind: internal
+packages:
+  - "@typespec/http-client-python"
+---
+
+Add mock API tests for new Spector scenarios: ARM operation templates (Legacy RoutedOperations, LRO on GET, POST LRO with paging body, POST action paging, markAsPageable) and `@clientApiVersions` decorator

packages/http-client-python/tests/mock_api/azure/asynctests/test_azure_client_generator_core_api_version_client_api_versions_async.py

@@ -0,0 +1,19 @@
+# -------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See License.txt in the project root for
+# license information.
+# --------------------------------------------------------------------------
+import pytest
+import pytest_asyncio
+from azure.clientgenerator.core.apiversion.clientapiversions.aio import ClientApiVersionsClient
+
+
+@pytest_asyncio.fixture
+async def client():
+    async with ClientApiVersionsClient(endpoint="http://localhost:3000", api_version="2022-10-01") as client:
+        yield client
+
+
+@pytest.mark.asyncio
+async def test_send_api_version(client: ClientApiVersionsClient):
+    await client.send_api_version()

packages/http-client-python/tests/mock_api/azure/test_azure_client_generator_core_api_version_client_api_versions.py

@@ -0,0 +1,17 @@
+# -------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See License.txt in the project root for
+# license information.
+# --------------------------------------------------------------------------
+import pytest
+from azure.clientgenerator.core.apiversion.clientapiversions import ClientApiVersionsClient
+
+
+@pytest.fixture
+def client():
+    with ClientApiVersionsClient(endpoint="http://localhost:3000", api_version="2022-10-01") as client:
+        yield client
+
+
+def test_send_api_version(client: ClientApiVersionsClient):
+    client.send_api_version()