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Detailed explanation of unit testing in Spring Boot

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Release: 2017-07-26 11:10:10
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In actual development, Junit unit testing is essential. In spring-boot, you can quickly use the unit testing function through the test module (spring-boot-starter-test).

Start

This example is tested in spring boot 1.5.4 version and passed

1. Add configuration spring-boot-starter- in pom.xml test

<dependency>
    <groupid>org.springframework.boot</groupid>
    <artifactid>spring-boot-starter-test</artifactid>
    <scope>test</scope>
</dependency>
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2. Create Controller

package com.sam.demo.controller;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @author sam
 * @since 2017/7/14
 */
@RestController
public class IndexController {

    @RequestMapping("/index")
    public String index() {
        return "index";
    }

}
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3 in the src/main/java directory. Create the Controller’s test class

package com.sam.demo.controller;

import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
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.setup.MockMvcBuilders;

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;


/**
 * @author sam
 * @since 2017/7/15
 */
// >>> spring boot 1.4.0 版本之后使用以下两个配置
@RunWith(SpringRunner.class)
@SpringBootTest

// >>> spring boot 1.4.0 版本之前使用以下三个配置
//@RunWith(SpringJUnit4ClassRunner.class)
//@SpringApplicationConfiguration(classes = DemoApplication.class)  //在spring boot 1.4.0 版本之后取消了 //classes需要指定spring boot 的启动类如:DemoApplication.class 不然WebApplicationContext不被实例化
//@WebAppConfiguration
public class IndexControllerTests {

//    @Autowired
//    private WebApplicationContext context;

    //mock api 模拟http请求
    private MockMvc mockMvc;

    //初始化工作
    @Before
    public void setUp() {
        //独立安装测试
        mockMvc = MockMvcBuilders.standaloneSetup(new IndexController()).build();
        //集成Web环境测试(此种方式并不会集成真正的web环境,而是通过相应的Mock API进行模拟测试,无须启动服务器)
        //mockMvc = MockMvcBuilders.webAppContextSetup(context).build();
    }

    //测试
    @Test
    public void index() throws Exception {
        mockMvc.perform(MockMvcRequestBuilders.get("/index")
                .accept(MediaType.APPLICATION_JSON))
                .andExpect(status().isOk())
                .andExpect(content().string(equalTo("index")));
    }
}
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and run it in the src/test/java directory. index() test, the following results were obtained:
Test passed

Detailed explanation of unit testing in Spring Boot

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