From bac51f3498a4f300e8b7679d605cabeea6f5b761 Mon Sep 17 00:00:00 2001
From: Oleksandr Poliakov <oleksandr.poliakov@mongodb.com>
Date: Thu, 18 Sep 2025 16:34:43 -0700
Subject: [PATCH] CSHARP-5738: Increase heartbeat interval and timeout if
 debugger is attached

---
 .../Core/CoreTestConfiguration.cs                    | 12 ++++++++++--
 .../DriverTestConfiguration.cs                       |  8 +++++++-
 2 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/tests/MongoDB.Driver.TestHelpers/Core/CoreTestConfiguration.cs b/tests/MongoDB.Driver.TestHelpers/Core/CoreTestConfiguration.cs
index ede30c727af..8919c1d79c9 100644
--- a/tests/MongoDB.Driver.TestHelpers/Core/CoreTestConfiguration.cs
+++ b/tests/MongoDB.Driver.TestHelpers/Core/CoreTestConfiguration.cs
@@ -29,7 +29,6 @@
 using MongoDB.Driver.Core.Operations;
 using MongoDB.Driver.Core.Servers;
 using MongoDB.Driver.Core.WireProtocol.Messages.Encoders;
-using MongoDB.Driver.Encryption;
 using MongoDB.Driver.TestHelpers;
 using Xunit.Sdk;
 
@@ -127,7 +126,16 @@ public static ClusterBuilder ConfigureCluster(ClusterBuilder builder)
         {
             builder = builder
                 .ConfigureWithConnectionString(__connectionString.Value, __serverApi.Value)
-                .ConfigureCluster(c => c.With(serverSelectionTimeout: __defaultServerSelectionTimeout.Value));
+                .ConfigureCluster(c => c.With(serverSelectionTimeout: __defaultServerSelectionTimeout.Value))
+                .ConfigureServer(s =>
+                {
+                    if (Debugger.IsAttached)
+                    {
+                        s = s.With(heartbeatTimeout: TimeSpan.FromDays(1), serverMonitoringMode: ServerMonitoringMode.Poll);
+                    }
+
+                    return s;
+                });;
 
             if (__connectionString.Value.Tls.HasValue &&
                 __connectionString.Value.Tls.Value &&
diff --git a/tests/MongoDB.Driver.TestHelpers/DriverTestConfiguration.cs b/tests/MongoDB.Driver.TestHelpers/DriverTestConfiguration.cs
index 4a266dbb70a..2a710c6ee8b 100644
--- a/tests/MongoDB.Driver.TestHelpers/DriverTestConfiguration.cs
+++ b/tests/MongoDB.Driver.TestHelpers/DriverTestConfiguration.cs
@@ -24,7 +24,6 @@
 using MongoDB.Driver.Core.Clusters;
 using MongoDB.Driver.Core.Configuration;
 using MongoDB.Driver.Core.Connections;
-using MongoDB.Driver.Core.Logging;
 using MongoDB.Driver.Core.Servers;
 using MongoDB.Driver.Encryption;
 
@@ -184,6 +183,13 @@ public static MongoClientSettings GetClientSettings()
             {
                 serverSelectionTimeoutString = "30000";
             }
+
+            if (System.Diagnostics.Debugger.IsAttached)
+            {
+                clientSettings.HeartbeatTimeout = TimeSpan.FromDays(1);
+                clientSettings.ServerMonitoringMode = ServerMonitoringMode.Poll;
+            }
+
             clientSettings.ServerSelectionTimeout = TimeSpan.FromMilliseconds(int.Parse(serverSelectionTimeoutString));
             clientSettings.ClusterConfigurator = cb => CoreTestConfiguration.ConfigureLogging(cb);
             clientSettings.ServerApi = CoreTestConfiguration.ServerApi;