diff --git a/src/test/java/com/njcn/middle/cache/integration/CacheExpireSlidingTest.java b/src/test/java/com/njcn/middle/cache/integration/CacheExpireSlidingTest.java
new file mode 100644
index 0000000..b1f43e5
--- /dev/null
+++ b/src/test/java/com/njcn/middle/cache/integration/CacheExpireSlidingTest.java
@@ -0,0 +1,102 @@
+package com.njcn.middle.cache.integration;
+
+import com.njcn.middle.cache.support.CacheKeyBuilder;
+import com.njcn.middle.cache.template.RedisCacheEnhanceTemplate;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.SpringBootConfiguration;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.data.redis.core.StringRedisTemplate;
+
+import java.util.concurrent.TimeUnit;
+import java.util.function.Supplier;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+/**
+ * 集成测试:显式 expire 续期、滑动过期续真实值、空值标记不被续。
+ * default-ttl=3600,故滑动续期会把 TTL 拉到远大于初始 60s。
+ */
+@ExtendWith(RedisAvailableCondition.class)
+@SpringBootTest(classes = CacheExpireSlidingTest.TestApp.class,
+        properties = {
+                "redis-cache.key-prefix=it-cache:",
+                "redis-cache.default-ttl-seconds=3600",
+                "redis-cache.null-ttl-seconds=60",
+                "redis-cache.jitter-ratio=0",
+                "redis-cache.sliding-expire-enabled=true"
+        })
+class CacheExpireSlidingTest {
+
+    @Autowired
+    private RedisCacheEnhanceTemplate cache;
+    @Autowired
+    private StringRedisTemplate redis;
+    @Autowired
+    private CacheKeyBuilder keyBuilder;
+
+    private long ttl(String bizKey) {
+        Long e = redis.getExpire(keyBuilder.build(bizKey), TimeUnit.SECONDS);
+        return e == null ? -1 : e;
+    }
+
+    @Test
+    void explicitExpireExtendsTtl() {
+        String key = "exp:1";
+        cache.set(key, new User(1L, "a"), 60);
+        assertTrue(ttl(key) <= 60 && ttl(key) > 0);
+        assertTrue(cache.expire(key, 600));
+        assertTrue(ttl(key) > 100, "expire 应把 TTL 续到 600 量级");
+        cache.delete(key);
+    }
+
+    @Test
+    void expireOnMissingKeyReturnsFalse() {
+        String key = "exp:missing";
+        cache.delete(key);
+        assertFalse(cache.expire(key, 600));
+    }
+
+    @Test
+    void slidingRenewsRealValueOnGet() {
+        String key = "sld:1";
+        cache.set(key, new User(1L, "a"), 60); // 初始 ~60s
+        assertTrue(ttl(key) <= 60 && ttl(key) > 0);
+        cache.get(key, User.class); // 命中真实值 → 滑动续到 default 3600
+        assertTrue(ttl(key) > 1000, "滑动过期应把 TTL 续到 default 量级");
+        cache.delete(key);
+    }
+
+    @Test
+    void slidingDoesNotRenewNullSentinel() {
+        String key = "sld:missing";
+        cache.delete(key);
+        Supplier<User> loader = () -> null;
+        assertNull(cache.getOrLoad(key, User.class, 60, loader)); // 写空标记 ttl=60
+        long before = ttl(key);
+        assertTrue(before <= 60 && before > 0);
+        assertNull(cache.get(key, User.class)); // 命中空标记,不续
+        assertTrue(ttl(key) <= 60, "空值标记不应被滑动续期");
+        cache.delete(key);
+    }
+
+    @SpringBootConfiguration
+    @EnableAutoConfiguration
+    static class TestApp {
+    }
+
+    @Data
+    @AllArgsConstructor
+    @NoArgsConstructor
+    static class User {
+        private Long id;
+        private String name;
+    }
+}