TA 역할 Spring 경계 smoke (role-ta-live-v2-001)

src/test/java/com/runtimematrix/exception/GlobalExceptionHandlerTest.java

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+package com.runtimematrix.exception;
+
+import com.runtimematrix.dto.ErrorResponse;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
+import org.springframework.test.web.servlet.MockMvc;
+
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.*;
+
+@WebMvcTest
+class GlobalExceptionHandlerTest {
+
+    @Autowired
+    private MockMvc mockMvc;
+
+    @Test
+    void businessException_returnsConsistentErrorFormat() throws Exception {
+        mockMvc.perform(get("/api/v1/roles/999"))
+                .andExpect(status().isNotFound())
+                .andExpect(jsonPath("$.code").value("ERR_ROLE_NOT_FOUND"))
+                .andExpect(jsonPath("$.timestamp").exists())
+                .andExpect(jsonPath("$.path").value("/api/v1/roles/999"));
+    }
+}