spring-boot-rest/spring-mvc-java/src/test/java/com/baeldung/web/controller/ClassValidationMvcIntegrationTest.java

package com.baeldung.web.controller;

import static org.springframework.test.web.servlet.result.MockMvcResultHandlers.print;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.model;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.view;

import org.junit.Before;
import org.junit.Test;
import org.springframework.http.MediaType;
import org.springframework.test.web.servlet.MockMvc;
import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
import org.springframework.test.web.servlet.setup.MockMvcBuilders;

public class ClassValidationMvcIntegrationTest {
  private MockMvc mockMvc;
    
    @Before
    public void setup(){
        this.mockMvc = MockMvcBuilders.standaloneSetup(new NewUserController()).build();
    }
    
    @Test
    public void givenMatchingEmailPassword_whenPostNewUserForm_thenOk() throws Exception {
        this.mockMvc.perform(MockMvcRequestBuilders.post("/user")
                .accept(MediaType.TEXT_HTML)
                .param("email", "john@yahoo.com")
                .param("verifyEmail", "john@yahoo.com")
                .param("password", "pass")
                .param("verifyPassword", "pass"))
                .andExpect(model().attribute("message", "Valid form"))
                .andExpect(view().name("userHome"))
                .andExpect(status().isOk())
                .andDo(print());
    }
    
    @Test
    public void givenNotMatchingEmailPassword_whenPostNewUserForm_thenOk() throws Exception {
        this.mockMvc.perform(MockMvcRequestBuilders.post("/user")
                .accept(MediaType.TEXT_HTML)
                .param("email", "john@yahoo.com")
                .param("verifyEmail", "john@yahoo.commmm")
                .param("password", "pass")
                .param("verifyPassword", "passsss"))
                .andExpect(model().errorCount(2))
                .andExpect(view().name("userHome"))
                .andExpect(status().isOk())
                .andDo(print());
    }
}