[python] support enum type for array encode

.chronus/changes/copilot-add-test-case-http-client-2026-0-19-7-35-17.md

@@ -0,0 +1,7 @@
+---
+changeKind: feature
+packages:
+  - "@typespec/http-client-python"
+---
+
+Support enum type for array encode

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

@@ -848,6 +848,14 @@ def _deserialize_multiple_sequence(
     return type(obj)(_deserialize(deserializer, entry, module) for entry, deserializer in zip(obj, entry_deserializers))
 
 
+def _is_array_encoded_deserializer(deserializer: functools.partial) -> bool:
+    return (
+        isinstance(deserializer, functools.partial)
+        and isinstance(deserializer.args[0], functools.partial)
+        and deserializer.args[0].func == _deserialize_array_encoded  # pylint: disable=comparison-with-callable
+    )
+
+
 def _deserialize_sequence(
     deserializer: typing.Optional[typing.Callable],
     module: typing.Optional[str],
@@ -857,17 +865,19 @@ def _deserialize_sequence(
         return obj
     if isinstance(obj, ET.Element):
         obj = list(obj)
-    try:
-        if (
-            isinstance(obj, str)
-            and isinstance(deserializer, functools.partial)
-            and isinstance(deserializer.args[0], functools.partial)
-            and deserializer.args[0].func == _deserialize_array_encoded  # pylint: disable=comparison-with-callable
-        ):
-            # encoded string may be deserialized to sequence
+
+    # encoded string may be deserialized to sequence
+    if isinstance(obj, str) and isinstance(deserializer, functools.partial):
+        # for list[str]
+        if _is_array_encoded_deserializer(deserializer):
             return deserializer(obj)
-    except:  # pylint: disable=bare-except
-        pass
+
+        # for list[Union[...]]
+        if isinstance(deserializer.args[0], list):
+            for sub_deserializer in deserializer.args[0]:
+                if _is_array_encoded_deserializer(sub_deserializer):
+                    return sub_deserializer(obj)
+
     return type(obj)(_deserialize(deserializer, entry, module) for entry in obj)
 
 

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

@@ -41,3 +41,99 @@ async def test_newline_delimited(client: ArrayClient):
     body = models.NewlineDelimitedArrayProperty(value=["blue", "red", "green"])
     result = await client.property.newline_delimited(body)
     assert result.value == ["blue", "red", "green"]
+
+
+@pytest.mark.asyncio
+async def test_enum_comma_delimited(client: ArrayClient):
+    body = models.CommaDelimitedEnumArrayProperty(value=[models.Colors.BLUE, models.Colors.RED, models.Colors.GREEN])
+    result = await client.property.enum_comma_delimited(body)
+    assert result.value == [models.Colors.BLUE, models.Colors.RED, models.Colors.GREEN]
+
+
+@pytest.mark.asyncio
+async def test_enum_space_delimited(client: ArrayClient):
+    body = models.SpaceDelimitedEnumArrayProperty(value=[models.Colors.BLUE, models.Colors.RED, models.Colors.GREEN])
+    result = await client.property.enum_space_delimited(body)
+    assert result.value == [models.Colors.BLUE, models.Colors.RED, models.Colors.GREEN]
+
+
+@pytest.mark.asyncio
+async def test_enum_pipe_delimited(client: ArrayClient):
+    body = models.PipeDelimitedEnumArrayProperty(value=[models.Colors.BLUE, models.Colors.RED, models.Colors.GREEN])
+    result = await client.property.enum_pipe_delimited(body)
+    assert result.value == [models.Colors.BLUE, models.Colors.RED, models.Colors.GREEN]
+
+
+@pytest.mark.asyncio
+async def test_enum_newline_delimited(client: ArrayClient):
+    body = models.NewlineDelimitedEnumArrayProperty(value=[models.Colors.BLUE, models.Colors.RED, models.Colors.GREEN])
+    result = await client.property.enum_newline_delimited(body)
+    assert result.value == [models.Colors.BLUE, models.Colors.RED, models.Colors.GREEN]
+
+
+@pytest.mark.asyncio
+async def test_extensible_enum_comma_delimited(client: ArrayClient):
+    body = models.CommaDelimitedExtensibleEnumArrayProperty(
+        value=[
+            models.ColorsExtensibleEnum.BLUE,
+            models.ColorsExtensibleEnum.RED,
+            models.ColorsExtensibleEnum.GREEN,
+        ]
+    )
+    result = await client.property.extensible_enum_comma_delimited(body)
+    assert result.value == [
+        models.ColorsExtensibleEnum.BLUE,
+        models.ColorsExtensibleEnum.RED,
+        models.ColorsExtensibleEnum.GREEN,
+    ]
+
+
+@pytest.mark.asyncio
+async def test_extensible_enum_space_delimited(client: ArrayClient):
+    body = models.SpaceDelimitedExtensibleEnumArrayProperty(
+        value=[
+            models.ColorsExtensibleEnum.BLUE,
+            models.ColorsExtensibleEnum.RED,
+            models.ColorsExtensibleEnum.GREEN,
+        ]
+    )
+    result = await client.property.extensible_enum_space_delimited(body)
+    assert result.value == [
+        models.ColorsExtensibleEnum.BLUE,
+        models.ColorsExtensibleEnum.RED,
+        models.ColorsExtensibleEnum.GREEN,
+    ]
+
+
+@pytest.mark.asyncio
+async def test_extensible_enum_pipe_delimited(client: ArrayClient):
+    body = models.PipeDelimitedExtensibleEnumArrayProperty(
+        value=[
+            models.ColorsExtensibleEnum.BLUE,
+            models.ColorsExtensibleEnum.RED,
+            models.ColorsExtensibleEnum.GREEN,
+        ]
+    )
+    result = await client.property.extensible_enum_pipe_delimited(body)
+    assert result.value == [
+        models.ColorsExtensibleEnum.BLUE,
+        models.ColorsExtensibleEnum.RED,
+        models.ColorsExtensibleEnum.GREEN,
+    ]
+
+
+@pytest.mark.asyncio
+async def test_extensible_enum_newline_delimited(client: ArrayClient):
+    body = models.NewlineDelimitedExtensibleEnumArrayProperty(
+        value=[
+            models.ColorsExtensibleEnum.BLUE,
+            models.ColorsExtensibleEnum.RED,
+            models.ColorsExtensibleEnum.GREEN,
+        ]
+    )
+    result = await client.property.extensible_enum_newline_delimited(body)
+    assert result.value == [
+        models.ColorsExtensibleEnum.BLUE,
+        models.ColorsExtensibleEnum.RED,
+        models.ColorsExtensibleEnum.GREEN,
+    ]

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

@@ -36,3 +36,91 @@ def test_newline_delimited(client: ArrayClient):
     body = models.NewlineDelimitedArrayProperty(value=["blue", "red", "green"])
     result = client.property.newline_delimited(body)
     assert result.value == ["blue", "red", "green"]
+
+
+def test_enum_comma_delimited(client: ArrayClient):
+    body = models.CommaDelimitedEnumArrayProperty(value=[models.Colors.BLUE, models.Colors.RED, models.Colors.GREEN])
+    result = client.property.enum_comma_delimited(body)
+    assert result.value == [models.Colors.BLUE, models.Colors.RED, models.Colors.GREEN]
+
+
+def test_enum_space_delimited(client: ArrayClient):
+    body = models.SpaceDelimitedEnumArrayProperty(value=[models.Colors.BLUE, models.Colors.RED, models.Colors.GREEN])
+    result = client.property.enum_space_delimited(body)
+    assert result.value == [models.Colors.BLUE, models.Colors.RED, models.Colors.GREEN]
+
+
+def test_enum_pipe_delimited(client: ArrayClient):
+    body = models.PipeDelimitedEnumArrayProperty(value=[models.Colors.BLUE, models.Colors.RED, models.Colors.GREEN])
+    result = client.property.enum_pipe_delimited(body)
+    assert result.value == [models.Colors.BLUE, models.Colors.RED, models.Colors.GREEN]
+
+
+def test_enum_newline_delimited(client: ArrayClient):
+    body = models.NewlineDelimitedEnumArrayProperty(value=[models.Colors.BLUE, models.Colors.RED, models.Colors.GREEN])
+    result = client.property.enum_newline_delimited(body)
+    assert result.value == [models.Colors.BLUE, models.Colors.RED, models.Colors.GREEN]
+
+
+def test_extensible_enum_comma_delimited(client: ArrayClient):
+    body = models.CommaDelimitedExtensibleEnumArrayProperty(
+        value=[
+            models.ColorsExtensibleEnum.BLUE,
+            models.ColorsExtensibleEnum.RED,
+            models.ColorsExtensibleEnum.GREEN,
+        ]
+    )
+    result = client.property.extensible_enum_comma_delimited(body)
+    assert result.value == [
+        models.ColorsExtensibleEnum.BLUE,
+        models.ColorsExtensibleEnum.RED,
+        models.ColorsExtensibleEnum.GREEN,
+    ]
+
+
+def test_extensible_enum_space_delimited(client: ArrayClient):
+    body = models.SpaceDelimitedExtensibleEnumArrayProperty(
+        value=[
+            models.ColorsExtensibleEnum.BLUE,
+            models.ColorsExtensibleEnum.RED,
+            models.ColorsExtensibleEnum.GREEN,
+        ]
+    )
+    result = client.property.extensible_enum_space_delimited(body)
+    assert result.value == [
+        models.ColorsExtensibleEnum.BLUE,
+        models.ColorsExtensibleEnum.RED,
+        models.ColorsExtensibleEnum.GREEN,
+    ]
+
+
+def test_extensible_enum_pipe_delimited(client: ArrayClient):
+    body = models.PipeDelimitedExtensibleEnumArrayProperty(
+        value=[
+            models.ColorsExtensibleEnum.BLUE,
+            models.ColorsExtensibleEnum.RED,
+            models.ColorsExtensibleEnum.GREEN,
+        ]
+    )
+    result = client.property.extensible_enum_pipe_delimited(body)
+    assert result.value == [
+        models.ColorsExtensibleEnum.BLUE,
+        models.ColorsExtensibleEnum.RED,
+        models.ColorsExtensibleEnum.GREEN,
+    ]
+
+
+def test_extensible_enum_newline_delimited(client: ArrayClient):
+    body = models.NewlineDelimitedExtensibleEnumArrayProperty(
+        value=[
+            models.ColorsExtensibleEnum.BLUE,
+            models.ColorsExtensibleEnum.RED,
+            models.ColorsExtensibleEnum.GREEN,
+        ]
+    )
+    result = client.property.extensible_enum_newline_delimited(body)
+    assert result.value == [
+        models.ColorsExtensibleEnum.BLUE,
+        models.ColorsExtensibleEnum.RED,
+        models.ColorsExtensibleEnum.GREEN,
+    ]

packages/http-client-python/package.json

@@ -94,7 +94,7 @@
     "@typespec/sse": "~0.78.0",
     "@typespec/streams": "~0.78.0",
     "@typespec/xml": "~0.78.0",
-    "@typespec/http-specs": "0.1.0-alpha.31",
+    "@typespec/http-specs": "0.1.0-alpha.32-dev.1",
     "@types/js-yaml": "~4.0.5",
     "@types/node": "~24.1.0",
     "@types/semver": "7.5.8",