How to connect to local running server in springboot testing - spring

Question

My application is running in local with port 8089, I am trying to do Spring Rest Controller testing.
It is running in 8089 port.
In application.yml
spring:
profiles:
active: sit
In application-sit.yml
server:
port: 8089
servlet:
context-path: /myapp
In My base test case:
import org.junit.Test;
import org.junit.runner.RunWith;
#RunWith(SpringJUnit4ClassRunner.class)
//#SpringBootTest( webEnvironment = SpringBootTest.WebEnvironment.DEFINED_PORT)
//#WebAppConfiguration
#SpringBootTest(classes = MyApplication.class,
webEnvironment = SpringBootTest.WebEnvironment.DEFINED_PORT)
#ActiveProfiles("sit")
public abstract class FullOtpControllerTest {
protected MockMvc mvc;
#Autowired
WebApplicationContext webApplicationContext;
#Value("${server.port}")
int serverPort;
#Test
public void sendOtpTest() throws Exception {
String uri = "/sendOtp";
//{"clientId": "default2","tag": "tag","mobileNumber": "9999988888"}
SendOTPRequestDTO otpRequest = new SendOTPRequestDTO();
otpRequest.setClientId("default2");
otpRequest.setTag("tag");
otpRequest.setMobileNumber("9321901416");
String inputJson = mapToJson(otpRequest);
MvcResult mvcResult = mvc.perform(MockMvcRequestBuilders.post(uri)
//.accept(MediaType.APPLICATION_JSON_VALUE)).andReturn()
.contentType(MediaType.APPLICATION_JSON_VALUE)
.content(inputJson)).andReturn();
int status = mvcResult.getResponse().getStatus();
String content = mvcResult.getResponse().getContentAsString();
assertEquals(8089,serverPort);
assertEquals(200, status);
}
}
But , first assert is passed. but in the debug it showing different port as showing in the below image.
I run: OtpControllerTest.sendOtpTest and I am getting:
java.lang.AssertionError:
Expected :200
Actual :404

Answer 1

MockMVC is intended for a different kind of testing.
It works in conjunction with #WebMvcTest annotation and allows testing your controller definitions: annotations, parameters, etc.
In this case spring starts a "splice" of the application that is relevant to the WEB layer, for example, it won't load beans annotated with #Service or #Repository, but will load all the #RestController annotated classes. If the controller depends on some service, you can mock it with a #MockBean annotation
In any case it doesn't require any kind of remote application everything runs "in-place".
#SpringBootTest annotation serves a different purpose, so you shouldn't run tests annotated with this annotation and use MockMVC instead:
#SpringBootTest runs the whole microservice (loads all the beans). Alternatively, there is a "mode" where spring boot test loads only explicitly defined Context Configurations...
If your purpose is black-box testing of the APIs of a remote application - you don't have to use spring at all - you don't need beans, don't need injection - you only need an Http Client of some sort (doesn't even have to be in Java) to implement this kind of tests.
One framework (out of many) is Rest Assured but again there are many choices here.