[Tool] JMeter

기본 테스트 예제

API

@RestController
public class EchoController {
    @PostMapping("/api/echo")
    public Map<String, Object> echo(
        @RequestHeader(required = false) Map<String, Object> headers,
        @RequestParam(required = false) Map<String, Object> params,
        @RequestBody(required = false) String body,
        @RequestPart(required = false) List<MultipartFile> files
    ) {
        Map<String, Object> result = new LinkedHashMap<>();
        result.put("headers", headers);
        result.put("params", params);
        result.put("body", body);
        result.put("files", Optional.ofNullable(files).orElseGet(ArrayList::new).stream().map(MultipartFile::getOriginalFilename).collect(Collectors.toList()));
        return result;
    }
}

Thread Group 추가

• Test Plan 우클릭 -> Add -> Threads -> Thread Group
• Number of Threads (users) : 100
• Ramp-up period (seconds) : 1
• Loop Count : Infinite
• Specify Thread lifetime : 체크
• Duration (seconds) : 10

HTTP Request 추가

• Thread Group 우클릭 -> Add -> Sampler -> HTTP Request
• Protocol : http
• Server Name or IP : localhost
• Port Number : 8080
• Http Method : POST
• Path : /api/echo
• Parameters
  • Name : message, Value : Hello World, URL Encode : 체크, Content-Type : text/plain

Listener 추가

• Thread Group 우클릭 -> Add -> Listener -> View Results in Table
• Thread Group 우클릭 -> Add -> Listener -> View Results Tree
• Thread Group 우클릭 -> Add -> Listener -> Summary Report

테스트

• Thread Group 우클릭 -> start
• Listener로 추가한 항목의 내용 확인

PreProcessor

JSR223 PreProcessor 추가

• Thread Group 우클릭 -> Add -> Pre Processors -> JSR223 PreProcessor
• Language : groovy
• Script

  def threadNumber = ctx.getThreadNum()
  def id = threadNumber.toString()
  def uuid = UUID.randomUUID().toString()
  def random = new Random().nextInt(20).toString() // 0 ~ 19
  
  vars.put("id", id) // 세팅되는 값을 ${id} 형식으로 사용 가능
  vars.put("uuid", uuid)
  vars.put("random", random)
  
  log.info("id : ${id}")
  log.info("uuid : ${uuid}")
  log.info("random : ${random}")
  

HTTP Request

• Parameters
  • Name : message, Value : Hello World - ${uuid}, URL Encode : 체크, Content-Type : text/plain

Header

HTTP Header Manager 추가

• Thread Group 우클릭 -> Add -> Config Element -> HTTP Header Manager
• Add 눌러 필요한 헤더값 추가
  • Name : Content-Type, Value : application/json
  • Name : tx-id, Value : ${uuid}

File Upload

HTTP Request

• 하단에 Files Upload 탭 -> Add
• File Path : test_image.png, Parameter Name : files, MIME Type : image/png

주의

• Content-Type이 강제로 application/json과 같은걸로 지정되면 안됨. Content-Type이 multipart/form-data여야 정상 동작하기 때문.
• MIME Type을 비워서 전송하면 Invalid content type 오류 발생