From 900591299f5a8ef61a09722205dfab03cc6ecae5 Mon Sep 17 00:00:00 2001
From: Sanghee Choi <32831939+pengin7384@users.noreply.github.com>
Date: Tue, 27 Jun 2023 17:27:40 +0900
Subject: [PATCH] common/lru: add test case for BasicLRU.Peek (#27559)

---
 common/lru/basiclru_test.go | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/common/lru/basiclru_test.go b/common/lru/basiclru_test.go
index e2d3559f5..29812bda1 100644
--- a/common/lru/basiclru_test.go
+++ b/common/lru/basiclru_test.go
@@ -170,6 +170,20 @@ func TestBasicLRUContains(t *testing.T) {
 	}
 }
 
+// Test that Peek doesn't update recent-ness
+func TestBasicLRUPeek(t *testing.T) {
+	cache := NewBasicLRU[int, int](2)
+	cache.Add(1, 1)
+	cache.Add(2, 2)
+	if v, ok := cache.Peek(1); !ok || v != 1 {
+		t.Errorf("1 should be set to 1")
+	}
+	cache.Add(3, 3)
+	if cache.Contains(1) {
+		t.Errorf("should not have updated recent-ness of 1")
+	}
+}
+
 func BenchmarkLRU(b *testing.B) {
 	var (
 		capacity = 1000