test 파일을 실행시켰는데 이러한 type error가 왜 뜨는건가요?

package econovation.demospringmvc.user;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
import org.springframework.http.MediaType;
import org.springframework.test.context.junit4.SpringRunner;
import org.springframework.test.web.servlet.MockMvc;
import org.springframework.test.web.servlet.ResultMatcher;

import static net.bytebuddy.matcher.ElementMatchers.is;
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.*;

@RunWith(SpringRunner.class)
@WebMvcTest(UserController.class)
public class UserControllerTest {

    @Autowired
    MockMvc mockMvc;

    @Test
    public void hello() throws Exception{
        mockMvc.perform(get("/hello"))
                .andExpect(status().isOk())
                .andExpect(content().string("hello"));
    }

    @Test
    public void createUser_JSON() throws Exception {
        String userJson = "";
        mockMvc.perform(post("/users/create")
                .contentType(MediaType.APPLICATION_JSON_UTF8)
                .accept(MediaType.APPLICATION_JSON_UTF8)
                .content(userJson))
            .andExpect(status().isOk())
            .andExpect(jsonPath("$.username",is(equalTo("keesun"))))
            .andExpect(jsonPath("$.password",is(equalTo("123"))));

    }
}


Error:(40, 32) java: incompatible types: 
org.springframework.test.web.servlet.result.
JsonPathResultMatchers cannot be converted to 
org.springframework.test.web.servlet.ResultMatcher