test

dotnet/tests/Microsoft.Agents.AI.Workflows.UnitTests/TestEchoAgent.cs

@@ -0,0 +1,93 @@
+// Copyright (c) Microsoft. All rights reserved.
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Runtime.CompilerServices;
+using System.Text.Json;
+using System.Threading;
+using System.Threading.Tasks;
+using Microsoft.Extensions.AI;
+
+namespace Microsoft.Agents.AI.Workflows.UnitTests;
+
+internal class TestEchoAgent(string? id = null, string? name = null, string? prefix = null) : AIAgent
+{
+    protected override string? IdCore => id;
+    public override string? Name => name ?? base.Name;
+
+    public override async ValueTask<AgentThread> DeserializeThreadAsync(JsonElement serializedThread, JsonSerializerOptions? jsonSerializerOptions = null, CancellationToken cancellationToken = default)
+    {
+        return serializedThread.Deserialize<EchoAgentThread>(jsonSerializerOptions) ?? await this.GetNewThreadAsync(cancellationToken);
+    }
+
+    public override ValueTask<AgentThread> GetNewThreadAsync(CancellationToken cancellationToken = default) =>
+        new(new EchoAgentThread());
+
+    private static ChatMessage UpdateThread(ChatMessage message, InMemoryAgentThread? thread = null)
+    {
+        thread?.MessageStore.Add(message);
+
+        return message;
+    }
+
+    private IEnumerable<ChatMessage> EchoMessages(IEnumerable<ChatMessage> messages, AgentThread? thread = null, AgentRunOptions? options = null)
+    {
+        foreach (ChatMessage message in messages)
+        {
+            UpdateThread(message, thread as InMemoryAgentThread);
+        }
+
+        IEnumerable<ChatMessage> echoMessages
+            = from message in messages
+              where message.Role == ChatRole.User &&
+                    !string.IsNullOrEmpty(message.Text)
+              select
+                    UpdateThread(new ChatMessage(ChatRole.Assistant, $"{prefix}{message.Text}")
+                    {
+                        AuthorName = this.Name ?? this.Id,
+                        CreatedAt = DateTimeOffset.Now,
+                        MessageId = Guid.NewGuid().ToString("N")
+                    }, thread as InMemoryAgentThread);
+
+        return echoMessages.Concat(this.GetEpilogueMessages(options).Select(m => UpdateThread(m, thread as InMemoryAgentThread)));
+    }
+
+    protected virtual IEnumerable<ChatMessage> GetEpilogueMessages(AgentRunOptions? options = null)
+    {
+        return [];
+    }
+
+    protected override Task<AgentResponse> RunCoreAsync(IEnumerable<ChatMessage> messages, AgentThread? thread = null, AgentRunOptions? options = null, CancellationToken cancellationToken = default)
+    {
+        AgentResponse result =
+            new(this.EchoMessages(messages, thread, options).ToList())
+            {
+                AgentId = this.Id,
+                CreatedAt = DateTimeOffset.Now,
+                ResponseId = Guid.NewGuid().ToString("N"),
+            };
+
+        return Task.FromResult(result);
+    }
+
+    protected override async IAsyncEnumerable<AgentResponseUpdate> RunCoreStreamingAsync(IEnumerable<ChatMessage> messages, AgentThread? thread = null, AgentRunOptions? options = null, [EnumeratorCancellation] CancellationToken cancellationToken = default)
+    {
+        string responseId = Guid.NewGuid().ToString("N");
+
+        foreach (ChatMessage message in this.EchoMessages(messages, thread, options).ToList())
+        {
+            yield return
+                new(message.Role, message.Contents)
+                {
+                    AgentId = this.Id,
+                    AuthorName = message.AuthorName,
+                    ResponseId = responseId,
+                    MessageId = message.MessageId,
+                    CreatedAt = message.CreatedAt
+                };
+        }
+    }
+
+    private sealed class EchoAgentThread : InMemoryAgentThread;
+}