HelloControllerTest.java

package com.ceos21.spring_boot.controller;

import org.junit.jupiter.api.DisplayName;
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.http.MediaType;
import org.springframework.test.web.servlet.MockMvc;
import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;

import static org.assertj.core.api.Assertions.assertThat;
import static org.junit.jupiter.api.Assertions.*;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;

@SpringBootTest
@AutoConfigureMockMvc
class HelloControllerTest {

    @Autowired
    private MockMvc mockMvc;

    @Test
    @DisplayName("HelloController 호출 시 Greetings 메세지 출력")
    void getHello() throws Exception {
        // given
        // when
        // then
        mockMvc.perform(MockMvcRequestBuilders.get("/")
                                .accept(MediaType.APPLICATION_JSON))
                                .andExpect(status().isOk())
                                .andExpect(content().string("Greetings from Spring Boot!"));

    }

}