test(cache): 集成测试 set/get/exists/delete 闭环 + Redis 探测脚手架

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");
+        }
+    }
+}