From e521233701ec685d6aa0ca33b0727992230c74dc Mon Sep 17 00:00:00 2001
From: BugLesser <17674638850@163.com>
Date: Thu, 29 Dec 2022 05:32:13 +0000
Subject: [PATCH] add Rename() support

---
 cache.go      | 4 ++--
 cache_test.go | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/cache.go b/cache.go
index 51f1876..4f7630f 100644
--- a/cache.go
+++ b/cache.go
@@ -118,10 +118,10 @@ func (c *cache) Replace(k string, x interface{}, d time.Duration) error {
 func (c *cache) Rename(oldk, newk string) error {
 	c.mu.Lock()
 	defer c.mu.Unlock()
-	item, found := c.get(oldk)
-	if !found {
+	if _, found := c.get(oldk); !found {
 		return fmt.Errorf("Item %s doesn't exist", oldk)
 	}
+	item := c.items[oldk]
 	delete(c.items, oldk)
 	c.items[newk] = item
 	return nil
diff --git a/cache_test.go b/cache_test.go
index 3146ad7..57c09be 100644
--- a/cache_test.go
+++ b/cache_test.go
@@ -1140,8 +1140,8 @@ func TestReplace(t *testing.T) {
 func TestRename(t *testing.T) {
 	tc := New(DefaultExpiration, 0)
 	err := tc.Rename("foo", "bar")
-	if err != nil {
-		t.Error(err)
+	if err == nil {
+		t.Error("Renamed foo when it shouldn't exist")
 	}
 	tc.Set("foo", 123, DefaultExpiration)
 	err = tc.Rename("foo", "bar")