diff --git a/src/test/java/com/njcn/middle/cache/integration/CacheRoundTripTest.java b/src/test/java/com/njcn/middle/cache/integration/CacheRoundTripTest.java
new file mode 100644
index 0000000..2742a64
--- /dev/null
+++ b/src/test/java/com/njcn/middle/cache/integration/CacheRoundTripTest.java
@@ -0,0 +1,59 @@
+package com.njcn.middle.cache.integration;
+
+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 static org.junit.jupiter.api.Assertions.assertEquals;
+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:真实 Redis 下 set/get/exists/delete 闭环。Redis 不可达自动 skip。
+ *
+ * <p>连接默认 127.0.0.1:6379;覆盖用 {@code -Dspring.redis.host=… -Dspring.redis.port=… -Dspring.redis.password=…}。
+ */
+@ExtendWith(RedisAvailableCondition.class)
+@SpringBootTest(classes = CacheRoundTripTest.TestApp.class,
+        properties = {"redis-cache.key-prefix=it-cache:"})
+class CacheRoundTripTest {
+
+    @Autowired
+    private RedisCacheEnhanceTemplate cache;
+
+    @Test
+    void setGetExistsDelete() {
+        String key = "rt:user:1";
+        cache.delete(key);
+
+        cache.set(key, new User(1L, "alice"), 60);
+        User got = cache.get(key, User.class);
+        assertEquals("alice", got.getName());
+        assertTrue(cache.exists(key));
+
+        assertTrue(cache.delete(key));
+        assertNull(cache.get(key, User.class));
+        assertFalse(cache.exists(key));
+    }
+
+    @SpringBootConfiguration
+    @EnableAutoConfiguration
+    static class TestApp {
+    }
+
+    @Data
+    @AllArgsConstructor
+    @NoArgsConstructor
+    static class User {
+        private Long id;
+        private String name;
+    }
+}
diff --git a/src/test/java/com/njcn/middle/cache/integration/RedisAvailableCondition.java b/src/test/java/com/njcn/middle/cache/integration/RedisAvailableCondition.java
new file mode 100644
index 0000000..8d76ed6
--- /dev/null
+++ b/src/test/java/com/njcn/middle/cache/integration/RedisAvailableCondition.java
@@ -0,0 +1,24 @@
+package com.njcn.middle.cache.integration;
+
+import org.junit.jupiter.api.extension.ConditionEvaluationResult;
+import org.junit.jupiter.api.extension.ExecutionCondition;
+import org.junit.jupiter.api.extension.ExtensionContext;
+
+import java.net.InetSocketAddress;
+import java.net.Socket;
+
+/** Redis 不可达时禁用整个测试类(skipped,非 failed),保证无 Redis 环境 mvn test 仍全绿。 */
+public class RedisAvailableCondition implements ExecutionCondition {
+    @Override
+    public ConditionEvaluationResult evaluateExecutionCondition(ExtensionContext context) {
+        String host = System.getProperty("spring.redis.host", "127.0.0.1");
+        int port = Integer.parseInt(System.getProperty("spring.redis.port", "6379"));
+        try (Socket s = new Socket()) {
+            s.connect(new InetSocketAddress(host, port), 500);
+            return ConditionEvaluationResult.enabled("redis reachable at " + host + ":" + port);
+        } catch (Exception e) {
+            return ConditionEvaluationResult.disabled(
+                    "no redis at " + host + ":" + port + ", skip integration test");
+        }
+    }
+}