.NET: A2A agent (#520)

* add a2a agent * Update dotnet/src/Microsoft.Extensions.AI.Agents.A2A/A2AAgent.cs Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com> * address pr review feedback * move unit tests for extension methods to the extensions folder * address pr review comments * address pr review comments * address pr review feedback * move a2a agent sample to console app * remove unnecessary Ids set for new projects in the solution file * remove unnecessary configuration --------- Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
2026-06-16 21:04:09 +08:00 · 2025-09-01 08:30:30 +00:00
parent 97d72c967f
commit 1d2f833122
30 changed files with 1656 additions and 1 deletions
@@ -0,0 +1,90 @@
+// Copyright (c) Microsoft. All rights reserved.
+
+using System.Collections.Generic;
+using A2A;
+
+namespace Microsoft.Extensions.AI.Agents.A2A.UnitTests;
+
+/// <summary>
+/// Unit tests for the <see cref="ChatMessageExtensions"/> class.
+/// </summary>
+public sealed class ChatMessageExtensionsTests
+{
+    [Fact]
+    public void ToA2AMessage_WithMessageContainingMultipleContents_AddsAllContentsAsParts()
+    {
+        // Arrange
+        var contents = new List<AIContent>
+        {
+            new HostedFileContent("https://example.com/report.pdf"),
+            new TextContent("please summarize the file content"),
+            new TextContent("and send it to me over email")
+        };
+        var chatMessage = new ChatMessage(ChatRole.User, contents);
+        var messages = new List<ChatMessage> { chatMessage };
+
+        // Act
+        var a2aMessage = messages.ToA2AMessage();
+
+        // Assert
+        Assert.NotNull(a2aMessage);
+        Assert.NotNull(a2aMessage.MessageId);
+        Assert.NotEmpty(a2aMessage.MessageId);
+
+        Assert.Equal(MessageRole.User, a2aMessage.Role);
+
+        Assert.NotNull(a2aMessage.Parts);
+        Assert.Equal(3, a2aMessage.Parts.Count);
+
+        var filePart = Assert.IsType<FilePart>(a2aMessage.Parts[0]);
+        Assert.NotNull(filePart.File);
+        var fileWithUri = Assert.IsType<FileWithUri>(filePart.File);
+        Assert.Equal("https://example.com/report.pdf", fileWithUri.Uri);
+
+        var secondTextPart = Assert.IsType<TextPart>(a2aMessage.Parts[1]);
+        Assert.Equal("please summarize the file content", secondTextPart.Text);
+
+        var thirdTextPart = Assert.IsType<TextPart>(a2aMessage.Parts[2]);
+        Assert.Equal("and send it to me over email", thirdTextPart.Text);
+    }
+
+    [Fact]
+    public void ToA2AMessage_WithMixedMessages_AddsAllContentsAsParts()
+    {
+        // Arrange
+        var firstMessage = new ChatMessage(ChatRole.User, [
+            new HostedFileContent("https://example.com/report.pdf")
+        ]);
+        var secondMessage = new ChatMessage(ChatRole.User, [
+            new TextContent("please summarize the file content")
+        ]);
+        var thirdMessage = new ChatMessage(ChatRole.User, [
+            new TextContent("and send it to me over email")
+        ]);
+        var messages = new List<ChatMessage> { firstMessage, secondMessage, thirdMessage };
+
+        // Act
+        var a2aMessage = messages.ToA2AMessage();
+
+        // Assert
+        Assert.NotNull(a2aMessage);
+        Assert.NotNull(a2aMessage.MessageId);
+        Assert.NotEmpty(a2aMessage.MessageId);
+
+        Assert.Equal(MessageRole.User, a2aMessage.Role);
+
+        Assert.NotNull(a2aMessage.Parts);
+        Assert.Equal(3, a2aMessage.Parts.Count);
+
+        var filePart = Assert.IsType<FilePart>(a2aMessage.Parts[0]);
+        Assert.NotNull(filePart.File);
+        var fileWithUri = Assert.IsType<FileWithUri>(filePart.File);
+        Assert.Equal("https://example.com/report.pdf", fileWithUri.Uri);
+
+        var secondTextPart = Assert.IsType<TextPart>(a2aMessage.Parts[1]);
+        Assert.Equal("please summarize the file content", secondTextPart.Text);
+
+        var thirdTextPart = Assert.IsType<TextPart>(a2aMessage.Parts[2]);
+        Assert.Equal("and send it to me over email", thirdTextPart.Text);
+    }
+}