Add an AgentRunResponse ctor accepting a ChatResponse (#204)

* Add an AgentRunResponse ctor accepting a ChatResponse

* Update dotnet/src/Microsoft.Extensions.AI.Agents.Abstractions/AgentRunResponseUpdate.cs

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

dotnet/tests/Microsoft.Extensions.AI.Agents.Abstractions.UnitTests/AgentRunResponseTests.cs

@@ -43,6 +43,28 @@ public class AgentRunResponseTests
         Assert.Same(messages, response.Messages);
     }
 
+    [Fact]
+    public void ConstructorWithChatResponseRoundtrips()
+    {
+        ChatResponse chatResponse = new()
+        {
+            AdditionalProperties = new(),
+            CreatedAt = new DateTimeOffset(2022, 1, 1, 0, 0, 0, TimeSpan.Zero),
+            Messages = [new(ChatRole.Assistant, "This is a test message.")],
+            RawRepresentation = new object(),
+            ResponseId = "responseId",
+            Usage = new UsageDetails(),
+        };
+
+        AgentRunResponse response = new(chatResponse);
+        Assert.Same(chatResponse.AdditionalProperties, response.AdditionalProperties);
+        Assert.Equal(chatResponse.CreatedAt, response.CreatedAt);
+        Assert.Same(chatResponse.Messages, response.Messages);
+        Assert.Equal(chatResponse.ResponseId, response.ResponseId);
+        Assert.Same(chatResponse.RawRepresentation, response.RawRepresentation);
+        Assert.Same(chatResponse.Usage, response.Usage);
+    }
+
     [Fact]
     public void PropertiesRoundtrip()
     {

dotnet/tests/Microsoft.Extensions.AI.Agents.Abstractions.UnitTests/AgentRunResponseUpdatesTests.cs

@@ -24,6 +24,35 @@ public class AgentRunResponseUpdateTests
         Assert.Equal(string.Empty, update.ToString());
     }
 
+    [Fact]
+    public void ConstructorWithChatResponseUpdateRoundtrips()
+    {
+        ChatResponseUpdate chatResponseUpdate = new()
+        {
+            AdditionalProperties = new(),
+            AuthorName = "author",
+            Contents = [new TextContent("hello")],
+            ConversationId = "conversationId",
+            CreatedAt = new DateTimeOffset(2022, 1, 1, 0, 0, 0, TimeSpan.Zero),
+            FinishReason = ChatFinishReason.Length,
+            MessageId = "messageId",
+            ModelId = "modelId",
+            RawRepresentation = new object(),
+            ResponseId = "responseId",
+            Role = ChatRole.Assistant,
+        };
+
+        AgentRunResponseUpdate response = new(chatResponseUpdate);
+        Assert.Same(chatResponseUpdate.AdditionalProperties, response.AdditionalProperties);
+        Assert.Equal(chatResponseUpdate.AuthorName, response.AuthorName);
+        Assert.Same(chatResponseUpdate.Contents, response.Contents);
+        Assert.Equal(chatResponseUpdate.CreatedAt, response.CreatedAt);
+        Assert.Equal(chatResponseUpdate.MessageId, response.MessageId);
+        Assert.Same(chatResponseUpdate.RawRepresentation, response.RawRepresentation);
+        Assert.Equal(chatResponseUpdate.ResponseId, response.ResponseId);
+        Assert.Equal(chatResponseUpdate.Role, response.Role);
+    }
+
     [Fact]
     public void PropertiesRoundtrip()
     {