Add usage namespace mock API tests for python SDK

Co-authored-by: msyyc <70930885+msyyc@users.noreply.github.com>

Author: Copilot

.chronus/changes/python-usage-namespace-test-2026-5-26-23-18-25.md

@@ -0,0 +1,7 @@
+---
+changeKind: internal
+packages:
+  - "@typespec/http-client-python"
+---
+
+Add sync and async mock API tests for the Azure client-generator-core usage namespace usage scenario from azure-http-specs.

packages/http-client-python/package-lock.json

@@ -66,13 +66,13 @@
     "@azure-tools/typespec-azure-rulesets": ">=0.68.0 <1.0.0",
     "@azure-tools/typespec-client-generator-core": ">=0.68.0 <1.0.0",
     "@typespec/compiler": "^1.12.0",
+    "@typespec/events": ">=0.82.0 <1.0.0",
     "@typespec/http": "^1.12.0",
     "@typespec/openapi": "^1.12.0",
     "@typespec/rest": ">=0.82.0 <1.0.0",
-    "@typespec/versioning": ">=0.82.0 <1.0.0",
-    "@typespec/events": ">=0.82.0 <1.0.0",
     "@typespec/sse": ">=0.82.0 <1.0.0",
     "@typespec/streams": ">=0.82.0 <1.0.0",
+    "@typespec/versioning": ">=0.82.0 <1.0.0",
     "@typespec/xml": ">=0.82.0 <1.0.0"
   },
   "playgroundConfig": {
@@ -98,27 +98,27 @@
     "tsx": "^4.21.0"
   },
   "devDependencies": {
+    "@azure-tools/azure-http-specs": "^0.1.0-alpha.41-dev.2",
     "@azure-tools/typespec-autorest": "~0.68.0",
     "@azure-tools/typespec-azure-core": "~0.68.0",
     "@azure-tools/typespec-azure-resource-manager": "~0.68.0",
     "@azure-tools/typespec-azure-rulesets": "~0.68.0",
     "@azure-tools/typespec-client-generator-core": "~0.68.2",
-    "@azure-tools/azure-http-specs": "0.1.0-alpha.41-dev.1",
+    "@types/js-yaml": "~4.0.5",
+    "@types/node": "~25.0.2",
+    "@types/semver": "7.5.8",
     "@typespec/compiler": "^1.12.0",
+    "@typespec/events": "~0.82.0",
     "@typespec/http": "^1.12.0",
+    "@typespec/http-specs": "0.1.0-alpha.37",
     "@typespec/openapi": "^1.12.0",
     "@typespec/rest": "~0.82.0",
-    "@typespec/versioning": "~0.82.0",
-    "@typespec/events": "~0.82.0",
-    "@typespec/spector": "0.1.0-alpha.25",
     "@typespec/spec-api": "0.1.0-alpha.14",
+    "@typespec/spector": "0.1.0-alpha.25",
     "@typespec/sse": "~0.82.0",
     "@typespec/streams": "~0.82.0",
+    "@typespec/versioning": "~0.82.0",
     "@typespec/xml": "~0.82.0",
-    "@typespec/http-specs": "0.1.0-alpha.37",
-    "@types/js-yaml": "~4.0.5",
-    "@types/node": "~25.0.2",
-    "@types/semver": "7.5.8",
     "c8": "^10.1.3",
     "picocolors": "~1.1.1",
     "rimraf": "~6.1.2",

packages/http-client-python/package.json

@@ -37,3 +37,10 @@ async def test_orphan_model_serializable(client: UsageClient):
     await client.model_in_operation.orphan_model_serializable(
         body=models.OrphanModel(model_name="name", description="desc")
     )
+
+
+@pytest.mark.asyncio
+async def test_namespace_model_serializable(client: UsageClient):
+    namespace_model = models.NamespaceModel(name="test")
+    assert isinstance(models.NestedNamespaceModel(value="test"), models.NestedNamespaceModel)
+    await client.namespace_usage.namespace_model_serializable(body=namespace_model)

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

@@ -30,3 +30,9 @@ def test_model_usage(client: UsageClient):
 
 def test_orphan_model_serializable(client: UsageClient):
     client.model_in_operation.orphan_model_serializable(body=models.OrphanModel(model_name="name", description="desc"))
+
+
+def test_namespace_model_serializable(client: UsageClient):
+    namespace_model = models.NamespaceModel(name="test")
+    assert isinstance(models.NestedNamespaceModel(value="test"), models.NestedNamespaceModel)
+    client.namespace_usage.namespace_model_serializable(body=namespace_model)