I have a class test which send me an error when I run the test.
I followed several threads and I have the right import “import org.junit.jupiter.api.Test”
So I don’t understand why it sends me this error :

Cannot invoke “org.springframework.test.web.servlet.MockMvc.perform(org.springframework.test.web.servlet.RequestBuilder)” because “this.mockMvc” is null

My code :

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.test.web.servlet.MockMvc;
import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.*;
import static org.springframework.test.web.servlet.result.MockMvcResultHandlers.print;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;

@WebMvcTest(TestController.class)
public class ControllerTest {

    @Autowired
    private MockMvc mockMvc;

    @MockBean
    private CreateMessageProvider createMessageProvider;

    @Test
    public void test() throws Exception {
        this.mockMvc.perform(get("/test"))
                .andDo(print())
                .andExpect(status().isOk())
                .andExpect(content().string("OK"));
    }
}