Add PostService Test 추가

src/test/java/com/example/springsecuritystudy/helper/TestConfig.java

@@ -0,0 +1,11 @@
+package com.example.springsecuritystudy.helper;
+
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.ActiveProfiles;
+import org.springframework.transaction.annotation.Transactional;
+
+@SpringBootTest
+@ActiveProfiles(value = "test")
+@Transactional
+public class TestConfig {
+}