[python] Add test cases for flatten-property unknown type and read-only scenarios

.chronus/changes/python-flatten-property-tests-2026-3-2-7-34-49.md

@@ -0,0 +1,7 @@
+---
+changeKind: internal
+packages:
+  - "@typespec/http-client-python"
+---
+
+Add test cases for flatten property with unknown type and read-only properties scenarios.

packages/http-client-python/generator/test/azure/mock_api_tests/asynctests/test_azure_client_generator_core_flatten_async.py

@@ -6,10 +6,12 @@
 import pytest
 from specs.azure.clientgenerator.core.flattenproperty.aio import FlattenPropertyClient
 from specs.azure.clientgenerator.core.flattenproperty.models import (
-    FlattenModel,
+    ChildFlattenModel,
     ChildModel,
+    FlattenModel,
+    FlattenUnknownModel,
     NestedFlattenModel,
-    ChildFlattenModel,
+    Solution,
 )
 
 
@@ -46,6 +48,22 @@ async def test_put_nested_flatten_model(client: FlattenPropertyClient):
     )
 
 
+@pytest.mark.asyncio
+async def test_put_flatten_unknown_model(client: FlattenPropertyClient):
+    result = await client.put_flatten_unknown_model(FlattenUnknownModel(name="foo"))
+    assert result.name == "test"
+    assert result.properties == {"key1": "value1", "key2": "value2"}
+
+
+@pytest.mark.asyncio
+async def test_put_flatten_read_only_model(client: FlattenPropertyClient):
+    result = await client.put_flatten_read_only_model(Solution({"name": "foo"}))
+    assert result.name == "foo"
+    assert result["solutionId"] == "solution1"
+    assert result["title"] == "Solution Title"
+    assert result["content"] == "Solution Content"
+
+
 @pytest.mark.asyncio  # ============test for compatibility ============
 async def test_dpg_model_common():
     flatten_model = FlattenModel(name="hello", properties=ChildModel(age=0, description="test"))

packages/http-client-python/generator/test/azure/mock_api_tests/test_azure_client_generator_core_flatten.py

@@ -6,10 +6,12 @@
 import pytest
 from specs.azure.clientgenerator.core.flattenproperty import FlattenPropertyClient
 from specs.azure.clientgenerator.core.flattenproperty.models import (
-    FlattenModel,
+    ChildFlattenModel,
     ChildModel,
+    FlattenModel,
+    FlattenUnknownModel,
     NestedFlattenModel,
-    ChildFlattenModel,
+    Solution,
 )
 
 
@@ -41,6 +43,20 @@ def test_put_nested_flatten_model(client: FlattenPropertyClient):
     )
 
 
+def test_put_flatten_unknown_model(client: FlattenPropertyClient):
+    result = client.put_flatten_unknown_model(FlattenUnknownModel(name="foo"))
+    assert result.name == "test"
+    assert result.properties == {"key1": "value1", "key2": "value2"}
+
+
+def test_put_flatten_read_only_model(client: FlattenPropertyClient):
+    result = client.put_flatten_read_only_model(Solution({"name": "foo"}))
+    assert result.name == "foo"
+    assert result["solutionId"] == "solution1"
+    assert result["title"] == "Solution Title"
+    assert result["content"] == "Solution Content"
+
+
 # ============test for compatibility ============
 def test_dpg_model_common():
     flatten_model = FlattenModel(name="hello", properties=ChildModel(age=0, description="test"))

packages/http-client-python/package.json

@@ -82,7 +82,7 @@
     "@azure-tools/typespec-azure-resource-manager": "~0.65.0",
     "@azure-tools/typespec-azure-rulesets": "~0.65.0",
     "@azure-tools/typespec-client-generator-core": "~0.65.3",
-    "@azure-tools/azure-http-specs": "0.1.0-alpha.38-dev.2",
+    "@azure-tools/azure-http-specs": "0.1.0-alpha.38-dev.4",
     "@typespec/compiler": "^1.9.0",
     "@typespec/http": "^1.9.0",
     "@typespec/openapi": "^1.9.0",