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Update AsOpenAIResponseItems to roundtrip User AIContent ResponseItems #6931

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Merged
stephentoub merged 2 commits into from
Oct 18, 2025
Merged

Update AsOpenAIResponseItems to roundtrip User AIContent ResponseItems #6931

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476e48f
Update AsOpenAIResponseItems to roundtrip User AIContent ResponseItems
stephentoub Oct 18, 2025
2badeed
Ensure ordering of AIContent-to-ResponseItem mapping
stephentoub Oct 18, 2025
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5 changes: 5 additions & 0 deletions src/Libraries/Microsoft.Extensions.AI.OpenAI/OpenAIResponsesChatClient.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -669,6 +669,11 @@ internal static IEnumerable<ResponseItem> ToOpenAIResponseItems(IEnumerable<Chat
{
switch (item)
{
case AIContent when item.RawRepresentation is ResponseItem rawRep:
handleEmptyMessage = false;
yield return rawRep;
break;

case AIContent when item.RawRepresentation is ResponseContentPart rawRep:
parts.Add(rawRep);
break;
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35 changes: 35 additions & 0 deletions test/Libraries/Microsoft.Extensions.AI.OpenAI.Tests/OpenAIConversionTests.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -275,6 +275,41 @@ public void AsOpenAIResponseItems_ProducesExpectedOutput()
Assert.Equal("The answer is 42.", Assert.Single(m5.Content).Text);
}

[Fact]
public void AsOpenAIResponseItems_RoundtripsRawRepresentation()
{
List<ChatMessage> messages =
[
new(ChatRole.User,
[
new TextContent("Hello"),
new AIContent { RawRepresentation = ResponseItem.CreateWebSearchCallItem() },
new AIContent { RawRepresentation = ResponseItem.CreateReferenceItem("123") },
new TextContent("World"),
]),
new(ChatRole.Assistant,
[
new TextContent("Hi!"),
new AIContent { RawRepresentation = ResponseItem.CreateReasoningItem("text") },
]),
new(ChatRole.User,
[
new AIContent { RawRepresentation = ResponseItem.CreateSystemMessageItem("test") },
]),
];

var items = messages.AsOpenAIResponseItems().ToArray();

Assert.Equal(6, items.Length);
Assert.Same(messages[0].Contents[1].RawRepresentation, items[0]);
Assert.Same(messages[0].Contents[2].RawRepresentation, items[1]);
Assert.Equal("Hello", ((MessageResponseItem)items[2]).Content[0].Text);
Assert.Equal("World", ((MessageResponseItem)items[2]).Content[1].Text);
Assert.Equal("Hi!", ((MessageResponseItem)items[3]).Content[0].Text);
Assert.Same(messages[1].Contents[1].RawRepresentation, items[4]);
Assert.Same(messages[2].Contents[0].RawRepresentation, items[5]);
}

[Fact]
public void AsChatResponse_ConvertsOpenAIChatCompletion()
{
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