From e3c0ab021ef1f1018392160c23fa5a20e31915f6 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Wed, 13 May 2026 19:20:09 +0000
Subject: [PATCH] Cover empty switch case targets

Agent-Logs-Url: https://github.com/microsoft/agent-framework/sessions/af831ee2-0a99-4427-9ffd-a3b5022c1b3b

Co-authored-by: lokitoth <6936551+lokitoth@users.noreply.github.com>
---
 .../WorkflowBuilderSmokeTests.cs                                 | 1 +
 1 file changed, 1 insertion(+)

diff --git a/dotnet/tests/Microsoft.Agents.AI.Workflows.UnitTests/WorkflowBuilderSmokeTests.cs b/dotnet/tests/Microsoft.Agents.AI.Workflows.UnitTests/WorkflowBuilderSmokeTests.cs
index 4e9cb19ee3..74e911eefe 100644
--- a/dotnet/tests/Microsoft.Agents.AI.Workflows.UnitTests/WorkflowBuilderSmokeTests.cs
+++ b/dotnet/tests/Microsoft.Agents.AI.Workflows.UnitTests/WorkflowBuilderSmokeTests.cs
@@ -432,6 +432,7 @@ public partial class WorkflowBuilderSmokeTests
         Assert.Throws<ArgumentNullException>("source", () => builder.AddSwitch(null!, _ => { }));
         Assert.Throws<ArgumentNullException>("configureSwitch", () => builder.AddSwitch(source, null!));
         Assert.Throws<ArgumentException>("targets", () => builder.AddSwitch(source, _ => { }));
+        Assert.Throws<ArgumentException>("targets", () => builder.AddSwitch(source, switchBuilder => switchBuilder.AddCase<string>(_ => true, [])));
     }
 
     [Fact]