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.NET: Fix to emit WorkflowStartedEvent during workflow execution (#4514)

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* Fix bug to emit WorkflowStartedEvent during workflow execution

* Updated based on PR comments
This commit is contained in:
Peter Ibekwe
2026-03-12 15:45:17 +00:00
committed by GitHub
parent bcb55b4a98
commit aa2ff672fb
3 changed files with 79 additions and 2 deletions
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dotnet/tests/Microsoft.Agents.AI.Workflows.UnitTests/AgentEventsTests.cs
+67
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@@ -1,7 +1,9 @@
// Copyright (c) Microsoft. All rights reserved.
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using FluentAssertions;
using Microsoft.Extensions.AI;
namespace Microsoft.Agents.AI.Workflows.UnitTests;
@@ -88,4 +90,69 @@ public class AgentEventsTests
Assert.Same(response, evt.Response);
Assert.Same(response, evt.Data);
}
/// <summary>
/// Verifies that WorkflowStartedEvent is emitted first before any SuperStepStartedEvent.
/// </summary>
[Fact]
public async Task StreamingRun_WorkflowStartedEvent_ShouldBeEmittedBefore_SuperStepStartedAsync()
{
// Arrange
TestEchoAgent agent = new("test-agent");
Workflow workflow = AgentWorkflowBuilder.BuildSequential(agent);
ChatMessage inputMessage = new(ChatRole.User, "Hello");
// Act
await using StreamingRun run = await InProcessExecution.RunStreamingAsync(workflow, new List<ChatMessage> { inputMessage });
await run.TrySendMessageAsync(new TurnToken(emitEvents: true));
List<WorkflowEvent> events = [];
await foreach (WorkflowEvent evt in run.WatchStreamAsync())
{
events.Add(evt);
}
// Assert
events.Should().NotBeEmpty();
List<WorkflowStartedEvent> startedEvents = events.OfType<WorkflowStartedEvent>().ToList();
startedEvents.Should().NotBeEmpty();
WorkflowStartedEvent? firstStartedEvent = startedEvents.FirstOrDefault();
SuperStepStartedEvent? firstSuperStepEvent = events.OfType<SuperStepStartedEvent>().FirstOrDefault();
firstSuperStepEvent.Should().NotBeNull();
int startedIndex = events.IndexOf(firstStartedEvent!);
int superStepIndex = events.IndexOf(firstSuperStepEvent!);
startedIndex.Should().BeLessThan(superStepIndex);
}
/// <summary>
/// Verifies that WorkflowStartedEvent is emitted using Lockstep execution mode.
/// </summary>
[Fact]
public async Task StreamingRun_LockstepExecution_ShouldEmit_WorkflowStartedEventAsync()
{
// Arrange
TestEchoAgent agent = new("test-agent");
Workflow workflow = AgentWorkflowBuilder.BuildSequential(agent);
ChatMessage inputMessage = new(ChatRole.User, "Hello");
// Act: Use Lockstep execution mode
await using StreamingRun run = await InProcessExecution.Lockstep.RunStreamingAsync(workflow, new List<ChatMessage> { inputMessage });
await run.TrySendMessageAsync(new TurnToken(emitEvents: true));
List<WorkflowEvent> events = [];
await foreach (WorkflowEvent evt in run.WatchStreamAsync())
{
events.Add(evt);
}
// Assert
events.Should().NotBeEmpty();
List<WorkflowStartedEvent> startedEvents = events.OfType<WorkflowStartedEvent>().ToList();
startedEvents.Should().NotBeEmpty();
}
}