TA 역할 Spring 경계 smoke (role-ta-live-1522-001)

src/test/java/com/runtimematrix/controller/ErrorResponseContractTest.java

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+package com.runtimematrix.controller;
+
+import com.runtimematrix.config.GlobalExceptionHandler;
+import com.runtimematrix.domain.exception.BusinessException;
+import com.runtimematrix.service.RoleService;
+import org.junit.jupiter.api.DisplayName;
+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.boot.test.mock.mockito.MockBean;
+import org.springframework.context.annotation.Import;
+import org.springframework.http.MediaType;
+import org.springframework.test.web.servlet.MockMvc;
+
+import static org.hamcrest.Matchers.*;
+import static org.mockito.Mockito.when;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.*;
+
+/** ADR-001 RFC 7807 오류 응답 계약 테스트 */
+@WebMvcTest(RoleController.class)
+@Import(GlobalExceptionHandler.class)
+@DisplayName("오류 응답 계약 테스트")
+class ErrorResponseContractTest {
+
+    @Autowired private MockMvc mockMvc;
+    @MockBean private RoleService roleService;
+
+    @Test
+    @DisplayName("역할 미존재 시 404와 RFC 7807 형식 응답 반환")
+    void role_not_found_returns_404_with_problem_details() throws Exception {
+        String roleId = "non-existent";
+        when(roleService.getRole(roleId)).thenThrow(new BusinessException.RoleNotFoundException(roleId));
+
+        mockMvc.perform(get("/api/v1/roles/{roleId}", roleId))
+            .andExpect(status().isNotFound())
+            .andExpect(content().contentType(MediaType.APPLICATION_PROBLEM_JSON))
+            .andExpect(jsonPath("$.type", startsWith("https://api.runtimematrix.com/errors/")))
+            .andExpect(jsonPath("$.title", is("역할을 찾을 수 없습니다")))
+            .andExpect(jsonPath("$.status", is(404)))
+            .andExpect(jsonPath("$.detail", containsString(roleId)))
+            .andExpect(jsonPath("$.instance", containsString("/api/v1/roles/")))
+            .andExpect(jsonPath("$.timestamp", notNullValue()))
+            .andExpect(jsonPath("$.traceId", notNullValue()));
+    }
+
+    @Test
+    @DisplayName("오류 응답에 모든 필수 필드 포함")
+    void error_response_contains_all_required_fields() throws Exception {
+        when(roleService.getRole("test")).thenThrow(new BusinessException.RoleNotFoundException("test"));
+
+        mockMvc.perform(get("/api/v1/roles/{roleId}", "test"))
+            .andExpect(status().isNotFound())
+            .andExpect(jsonPath("$", hasKey("type")))
+            .andExpect(jsonPath("$", hasKey("title")))
+            .andExpect(jsonPath("$", hasKey("status")))
+            .andExpect(jsonPath("$", hasKey("detail")))
+            .andExpect(jsonPath("$", hasKey("instance")))
+            .andExpect(jsonPath("$", hasKey("timestamp")))
+            .andExpect(jsonPath("$", hasKey("traceId")));
+    }
+}