test: GlobalExceptionHandler 테스트 구현

Author: lvalentine6

src/test/java/eatda/exception/GlobalExceptionHandlerTest.java

@@ -0,0 +1,133 @@
+package eatda.exception;
+
+
+import static org.hamcrest.Matchers.equalTo;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+import eatda.config.CorsConfig;
+import eatda.config.CorsProperties;
+import eatda.config.WebConfig;
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.security.servlet.SecurityAutoConfiguration;
+import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
+import org.springframework.boot.test.context.TestConfiguration;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.FilterType;
+import org.springframework.context.annotation.Import;
+import org.springframework.http.MediaType;
+import org.springframework.test.context.ActiveProfiles;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestHeader;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+@WebMvcTest(
+        controllers = GlobalExceptionHandlerTest.TestExceptionController.class,
+        excludeAutoConfiguration = SecurityAutoConfiguration.class,
+        excludeFilters = @ComponentScan.Filter(type = FilterType.ASSIGNABLE_TYPE, classes = {
+                WebConfig.class, CorsConfig.class
+        })
+)
+@Import(GlobalExceptionHandler.class)
+@ActiveProfiles("local")
+class GlobalExceptionHandlerTest {
+
+    @TestConfiguration
+    static class TestCorsConfig {
+        @Bean
+        public CorsProperties corsProperties() {
+            return new CorsProperties();
+        }
+    }
+
+    @RestController
+    @RequestMapping("/test")
+    public static class TestExceptionController {
+
+        @GetMapping("/business")
+        public void throwBusinessException() {
+            throw new BusinessException(BusinessErrorCode.STORY_NOT_FOUND);
+        }
+
+        @GetMapping("/mismatch")
+        public void typeMismatch(@RequestParam Long id) {
+        }
+
+        @GetMapping("/header")
+        public void missingHeader(@RequestHeader("X-Request-Id") String header) {
+        }
+
+        @PostMapping(value = "/mediatype", consumes = MediaType.APPLICATION_JSON_VALUE)
+        public void mediaTypeTest() {
+        }
+
+        @GetMapping("/method")
+        public void allowedMethod() {
+        }
+
+        @GetMapping("/unexpected")
+        public void throwUnexpected() {
+            throw new RuntimeException("예상치 못한 예외");
+        }
+    }
+
+    @Autowired
+    private MockMvc mockMvc;
+
+    @Nested
+    class handExceptions {
+
+        @Test
+        void 비즈니스_예외는_정의된_코드로_응답된다() throws Exception {
+            mockMvc.perform(get("/test/business"))
+                    .andExpect(status().isNotFound())
+                    .andExpect(jsonPath("$.errorCode", equalTo(BusinessErrorCode.STORY_NOT_FOUND.getCode())))
+                    .andExpect(jsonPath("$.message", equalTo(BusinessErrorCode.STORY_NOT_FOUND.getMessage())));
+        }
+
+        @Test
+        void 지원하지_않는_HTTP_METHOD는_405() throws Exception {
+            mockMvc.perform(post("/test/method"))
+                    .andExpect(status().isMethodNotAllowed())
+                    .andExpect(jsonPath("$.errorCode", equalTo(EtcErrorCode.METHOD_NOT_SUPPORTED.getCode())));
+        }
+
+        @Test
+        void 쿼리파라미터_형변환_실패는_400() throws Exception {
+            mockMvc.perform(get("/test/mismatch?id=abc"))
+                    .andExpect(status().isBadRequest())
+                    .andExpect(jsonPath("$.errorCode", equalTo(EtcErrorCode.METHOD_ARGUMENT_TYPE_MISMATCH.getCode())));
+        }
+
+        @Test
+        void 누락된_헤더는_400() throws Exception {
+            mockMvc.perform(get("/test/header"))
+                    .andExpect(status().isBadRequest())
+                    .andExpect(jsonPath("$.errorCode", equalTo(EtcErrorCode.NO_HEADER_FOUND.getCode())));
+        }
+
+        @Test
+        void 미지원_MediaType은_415() throws Exception {
+            mockMvc.perform(post("/test/mediatype")
+                            .contentType(MediaType.APPLICATION_XML))
+                    .andExpect(status().isUnsupportedMediaType())
+                    .andExpect(jsonPath("$.errorCode", equalTo(EtcErrorCode.MEDIA_TYPE_NOT_SUPPORTED.getCode())));
+        }
+
+        @Test
+        void 처리되지_않은_예외는_500() throws Exception {
+            mockMvc.perform(get("/test/unexpected"))
+                    .andExpect(status().isInternalServerError())
+                    .andExpect(jsonPath("$.errorCode", equalTo(EtcErrorCode.INTERNAL_SERVER_ERROR.getCode())));
+        }
+    }
+}