SERVER-45761 Use same clock for test and working code in session_test [v4.0]

1 files changed, 6 insertions, 12 deletions

diff --git a/src/mongo/db/session_test.cpp b/src/mongo/db/session_test.cpp
index 5e8424db7c3..e16f0a74663 100644
--- a/src/mongo/db/session_test.cpp
+++ b/src/mongo/db/session_test.cpp
@@ -698,12 +698,9 @@ TEST_F(SessionTest, StashAndUnstashResources) {
 }
 
 TEST_F(SessionTest, ReportStashedResources) {
-    Date_t startTime = Date_t::now();
-
-    // Sleep a bit after recording the startTime but before starting the transaction to account for
-    // any clock discrepancy between the Date_t clock and the clock used to track the transaction
-    // stats start time.
-    mongo::sleepmillis(10);
+    // The transaction participant uses the precise clock source for timing,
+    // so ensure we use the same clock source for testing.
+    Date_t startTime = opCtx()->getServiceContext()->getPreciseClockSource()->now();
 
     const auto sessionId = makeLogicalSessionIdForTest();
     const TxnNumber txnNum = 20;
@@ -803,12 +800,9 @@ TEST_F(SessionTest, ReportStashedResources) {
 }
 
 TEST_F(SessionTest, ReportUnstashedResources) {
-    Date_t startTime = Date_t::now();
-
-    // Sleep a bit after recording the startTime but before starting the transaction to account for
-    // any clock discrepancy between the Date_t clock and the clock used to track the transaction
-    // stats start time.
-    mongo::sleepmillis(10);
+    // The transaction participant uses the precise clock source for timing,
+    // so ensure we use the same clock source for testing.
+    Date_t startTime = opCtx()->getServiceContext()->getPreciseClockSource()->now();
 
     const auto sessionId = makeLogicalSessionIdForTest();
     const TxnNumber txnNum = 20;