spring-boot-examples/spring-boot-helloWorld/src/test/java/com/neo/controller/HelloTests.java

package com.neo.controller;

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.request.MockMvcRequestBuilders;
import org.springframework.test.web.servlet.result.MockMvcResultHandlers;


import static org.hamcrest.Matchers.equalTo;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;


@RunWith(SpringRunner.class)
@WebMvcTest(HelloWorldController.class)
public class HelloTests {

    @Autowired
    private MockMvc mvc;

    @Test
    public void getHello() throws Exception {
        mvc.perform(MockMvcRequestBuilders
                        .get("/hello")
                        .accept(MediaType.APPLICATION_JSON))
                        .andExpect(status().isOk())
                        .andDo(MockMvcResultHandlers.print())
                        .andExpect(content()
                                .string(equalTo("Hello World")));
    }

}