From 9bbe96c59ee98d3056a687aa54c76014b2aef1a2 Mon Sep 17 00:00:00 2001
From: Matt Dale <9760375+matthewdale@users.noreply.github.com>
Date: Wed, 13 Jul 2022 20:52:38 -0700
Subject: [PATCH] GODRIVER-2464 Add delay in RTT monitor test so Windows can
 measure a non-zero latency. (#1022)

---
 x/mongo/driver/topology/rtt_monitor_test.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/x/mongo/driver/topology/rtt_monitor_test.go b/x/mongo/driver/topology/rtt_monitor_test.go
index 2ae5a5c6df..73064771d6 100644
--- a/x/mongo/driver/topology/rtt_monitor_test.go
+++ b/x/mongo/driver/topology/rtt_monitor_test.go
@@ -275,6 +275,10 @@ func TestRTTMonitor(t *testing.T) {
 							return
 						}
 
+						// Delay for 10ms so that systems with limited timing granularity (e.g. some
+						// older versions of Windows) can measure a non-zero latency.
+						time.Sleep(10 * time.Millisecond)
+
 						if _, err := conn.Write(makeHelloReply()); err != nil {
 							// The connection read/write loop is cancelled by closing the connection,
 							// so may be an expected error here. Log the error to make debugging