如何在Spring Boot上测试javax.validator？

import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import javax.validation.Validation;
import javax.validation.Validator;
import javax.validation.ValidatorFactory;
import javax.validation.ConstraintViolation;
import java.util.Set;

@SpringBootTest
public class ValidationTest {

    @Autowired
    private Validator validator;

    @Test
    public void testValidation() {
        User user = new User();
        user.setName(""); // 这里故意设置为空，触发验证错误

        Set<ConstraintViolation<User>> violations = validator.validate(user);
        assert !violations.isEmpty();
    }
}

import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.web.servlet.MockMvc;
import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;

@SpringBootTest
@AutoConfigureMockMvc
public class UserControllerIntegrationTest {

    @Autowired
    private MockMvc mockMvc;

    @Test
    public void testCreateUserWithInvalidData() throws Exception {
        mockMvc.perform(post("/users")
                .contentType("application/json")
                .content("{}")) // 这里故意提交空数据，触发验证错误
                .andExpect(status().isBadRequest());
    }
}