springboot2.1.3+Junit4 单元测试

引入依赖的包：

<dependency>
      <groupId>org.mockito</groupId>
      <artifactId>mockito-core</artifactId>
      <version>2.23.4</version>
      <scope>test</scope>
</dependency>
<dependency>
    <groupId>org.powermock</groupId>
    <artifactId>powermock-api-mockito2</artifactId>
    <version>2.0.2</version>
    <scope>test</scope>
</dependency>
<dependency>
    <groupId>org.powermock</groupId>
    <artifactId>powermock-core</artifactId>
    <version>2.0.2</version>
    <scope>test</scope>
</dependency>
<dependency>
    <groupId>org.powermock</groupId>
    <artifactId>powermock-module-junit4</artifactId>
    <version>2.0.2</version>
    <scope>test</scope>
</dependency>

MockMvc + PowerMock + Mockito 来模拟post get请求，并mock掉service中存在doGet doPost外部系统的restful请求

@RunWith(PowerMockRunner.class)
@PowerMockRunnerDelegate(SpringRunner.class)
@prepareForTest({
        HttpUtil.class             // doGet doPost 使用util类，这里需要告诉UT
})
@PowerMockIgnore("javax.crypto.*")
@AutoConfigureMockMvc
@SpringBootTest
public class DemoSzlTest {
      @Autowired
      private WebApplicationContext webApplicationContext;
      private MockMvc mockMvc;
      
      @Before
      public void setUp() throws Exceptioin {
           MockitoAnnotations.initMocks(this); // 初始化装载powerMockito
           mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).build();
      }

      @Test
      @DirtiesContext
      public void testPostDemo() throws Exception {
            // mock HttpResponse 对象返回
            StringEntity se = new StringEntity("xxx", "xxx");
            HttpResponse resp = new BasicHttpResponse(new BasicStatusLine(HttpVersion.Http_1_1, HttpServletResponse.SC_OK, ""));
            resp.setEntity(se);
            PowerMockito.mockStatic(HttpUtil.class);
            // 这里的 Mockito.anyString() 要和 实际方法参数保持一致
            PowerMockite.when(HttpUtil.doGet(Mockito.anyString(), Mockito.anyMap(), Mockito.any())).thenReturn(resp);
            
            // body contents
           String jsonBody = "{\"aaaa\":\"1111\"}";
           String token = "xxxxx";
           MvcResult resultMsg = mockMvc.perform(
                    post("/xxx")
                    .contentType(MediaType.APPLICATION_JSON_VALUE)
                    .accept(MediaType.APPLICATION_JSON_UTF8_VALUE)
                    .header("xxxxx", token)
                    .content(jsonBody)    // request body 
           ).andExpect(status().isCeated())
            .andReturn();
     }

}

HttpUtil.java类：

public class HttpUtil {
      public static HttpResponse doGet(String url, Map<String, String> params, Header[] headers) {
         .....
         这里省略
     }

}

好了，后续内容逐步添加。