簡單記錄在Spring Boot 2.x對掛有@RestController的Controller的方法以JUnit 5進行單元測試。
Spring Boot的application.properties配置檔設定了Servlet環境根目錄為/mydemo。
application.properties
#context
server.servlet.context-path=/mydemo
server.port=8080
被測試的Controller類別
DemoController
package com.abc.demo.controller;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class DemoController {
@GetMapping(path="/get")
public String getDemo() {
return "hello world";
}
@GetMapping(path="/get/user", produces=MediaType.APPLICATION_JSON_UTF8_VALUE)
public String getJsonDemo() {
return "{\"name\":\"john\"}";
}
}
負責測試DemoController的測試類別，要在類別上掛@AutoConfigureMockMvc，並@Autowired注入MockMvc來模擬Request的發送。
被測試的DemoController.getDemo()方法的完整url路徑為localhost:8080/mydemo/get，但在MockMvcRequestBuilders.get(String urlTemplate, Object... uriVars)的url參數urlTemplate只要從環境根目錄後開始寫，所以為"/get"。
DemoControllerTest
package com.abc.demo.controller;
import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
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;
@SpringBootTest
@AutoConfigureMockMvc
public class DemoControllerTest {
@Autowired
private MockMvc mvc;
@Test
public void testGetDemo() throws Exception {
mvc.perform(get("/get"))
.andExpect(status().isOk())
.andExpect(content().string("hello world"));
}
@Test
public void testGetJsonDemo() throws Exception {
mvc.perform(get("/get/user"))
.andExpect(status().isOk())
.andExpect(content().json("{\"name\":\"john\"}"));
}
}
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