diff --git a/src/test/java/com/alibaba/druid/TestLRU.java b/src/test/java/com/alibaba/druid/TestLRU.java
new file mode 100644
index 0000000000..b5d434dab4
--- /dev/null
+++ b/src/test/java/com/alibaba/druid/TestLRU.java
@@ -0,0 +1,22 @@
+package com.alibaba.druid;
+
+import java.util.LinkedHashMap;
+
+import junit.framework.TestCase;
+
+
+public class TestLRU extends TestCase {
+    public void test_lru() throws Exception {
+        LinkedHashMap<Integer, Object> cache = new LinkedHashMap<Integer, Object>(100, 0.75f, true);
+        
+        cache.put(2, "22");
+        cache.put(3, "33");
+        
+        System.out.println(cache);
+        
+        cache.put(2, "22");
+        
+        System.out.println(cache);
+        
+    }
+}