[python] Fix XML deserialization for enum/datetime types and add mock API tests

.chronus/changes/http-client-python-xml-enum-datetime-tests-2026-2-14-5-42-5.md

@@ -0,0 +1,7 @@
+---
+changeKind: internal
+packages:
+  - "@typespec/http-client-python"
+---
+
+Add mock API tests for XML model with enum and datetime properties, and fix XML deserialization for enum and datetime types

packages/http-client-python/generator/pygen/codegen/templates/model_base.py.jinja2

@@ -1020,16 +1020,20 @@ def _deserialize_with_callable(
                 return float(value.text) if value.text else None
             if deserializer is bool:
                 return value.text == "true" if value.text else None
+            if callable(deserializer) and deserializer in _DESERIALIZE_MAPPING.values():
+                return deserializer(value.text)
+            if callable(deserializer) and deserializer in _DESERIALIZE_MAPPING_WITHFORMAT.values():
+                return deserializer(value.text)
         if deserializer is None:
             return value
         if deserializer in [int, float, bool]:
             return deserializer(value)
         if isinstance(deserializer, CaseInsensitiveEnumMeta):
             try:
-                return deserializer(value)
+                return deserializer(value.text if isinstance(value, ET.Element) else value)
             except ValueError:
                 # for unknown value, return raw value
-                return value
+                return value.text if isinstance(value, ET.Element) else value
         if isinstance(deserializer, type) and issubclass(deserializer, Model):
             return deserializer._deserialize(value, [])
         return typing.cast(typing.Callable[[typing.Any], typing.Any], deserializer)(value)

packages/http-client-python/generator/test/generic_mock_api_tests/asynctests/test_payload_xml_async.py

@@ -3,6 +3,7 @@
 # Licensed under the MIT License. See License.txt in the project root for
 # license information.
 # --------------------------------------------------------------------------
+import datetime
 import pytest
 from payload.xml.aio import XmlClient
 from payload.xml.models import (
@@ -18,6 +19,8 @@
     ModelWithText,
     ModelWithDictionary,
     ModelWithEncodedNames,
+    ModelWithEnum,
+    ModelWithDatetime,
 )
 
 
@@ -119,6 +122,24 @@ async def test_model_with_encoded_names(client: XmlClient):
     await client.model_with_encoded_names_value.put(model)
 
 
+@pytest.mark.asyncio
+async def test_model_with_enum(client: XmlClient):
+    model = ModelWithEnum(status="success")
+    assert await client.model_with_enum_value.get() == model
+    await client.model_with_enum_value.put(model)
+
+
+@pytest.mark.asyncio
+async def test_model_with_datetime(client: XmlClient):
+    model = ModelWithDatetime(
+        rfc3339=datetime.datetime(2022, 8, 26, 18, 38, 0, tzinfo=datetime.timezone.utc),
+        rfc7231=datetime.datetime(2022, 8, 26, 14, 38, 0, tzinfo=datetime.timezone.utc),
+    )
+    result = await client.model_with_datetime_value.get()
+    assert result.rfc3339 == model.rfc3339
+    assert result.rfc7231 == model.rfc7231
+
+
 @pytest.mark.asyncio
 async def test_xml_error_value(client: XmlClient, core_library):
     with pytest.raises(core_library.exceptions.HttpResponseError) as ex:

packages/http-client-python/generator/test/generic_mock_api_tests/test_payload_xml.py

@@ -3,6 +3,7 @@
 # Licensed under the MIT License. See License.txt in the project root for
 # license information.
 # --------------------------------------------------------------------------
+import datetime
 import pytest
 from payload.xml import XmlClient
 from payload.xml.models import (
@@ -18,6 +19,8 @@
     ModelWithText,
     ModelWithDictionary,
     ModelWithEncodedNames,
+    ModelWithEnum,
+    ModelWithDatetime,
 )
 
 
@@ -107,6 +110,22 @@ def test_model_with_encoded_names(client: XmlClient):
     client.model_with_encoded_names_value.put(model)
 
 
+def test_model_with_enum(client: XmlClient):
+    model = ModelWithEnum(status="success")
+    assert client.model_with_enum_value.get() == model
+    client.model_with_enum_value.put(model)
+
+
+def test_model_with_datetime(client: XmlClient):
+    model = ModelWithDatetime(
+        rfc3339=datetime.datetime(2022, 8, 26, 18, 38, 0, tzinfo=datetime.timezone.utc),
+        rfc7231=datetime.datetime(2022, 8, 26, 14, 38, 0, tzinfo=datetime.timezone.utc),
+    )
+    result = client.model_with_datetime_value.get()
+    assert result.rfc3339 == model.rfc3339
+    assert result.rfc7231 == model.rfc7231
+
+
 def test_xml_error_value(client: XmlClient, core_library):
     with pytest.raises(core_library.exceptions.HttpResponseError) as ex:
         client.xml_error_value.get()

packages/http-client-python/package.json

@@ -94,7 +94,7 @@
     "@typespec/sse": "~0.79.0",
     "@typespec/streams": "~0.79.0",
     "@typespec/xml": "~0.79.0",
-    "@typespec/http-specs": "0.1.0-alpha.32",
+    "@typespec/http-specs": "0.1.0-alpha.33-dev.2",
     "@types/js-yaml": "~4.0.5",
     "@types/node": "~25.0.2",
     "@types/semver": "7.5.8",