Spring Boot - unit test not detecting the controller test - spring-boot

Question

I have written unit test for the controller class but when I run unit test using "mvn test" or directly from "SpringBootDemo1ApplicationTests" only test under "SpringBootDemo1ApplicationTests" class runs, and it doesn't pick up test from "BookControllerTest" class.
SpringBootDemo1ApplicationTests.java:
package com.sprboot.SpringBootDemo1;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;
#SpringBootTest
class SpringBootDemo1ApplicationTests {
#Test
void contextLoads() {
}
}
BookControllerTest.java
package com.sprboot.SpringBootDemo1;
import com.sprboot.SpringBootDemo1.controllers.BookController;
import com.sprboot.SpringBootDemo1.models.Book;
import com.sprboot.SpringBootDemo1.services.BookService;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.autoconfigure.json.AutoConfigureJsonTesters;
import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.boot.test.json.JacksonTester;
import org.springframework.boot.test.mock.mockito.MockBean;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.mock.web.MockHttpServletResponse;
import org.springframework.test.web.servlet.MockMvc;
import java.util.Optional;
import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
import static org.mockito.BDDMockito.given;
import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
#AutoConfigureJsonTesters
#WebMvcTest(BookController.class)
#SpringBootTest
public class BookControllerTest {
#Autowired
private MockMvc mockMvc;
#MockBean
private BookService bookService;
#Autowired
private JacksonTester<Book> jsonBook;
#Test
private void canRetriveBookById() throws Exception {
given(bookService.getBookByID(123)).willReturn(Optional.of(new Book(123, "test book")));
MockHttpServletResponse response = mockMvc.perform(
get("/getBookById/123")
.accept(MediaType.APPLICATION_JSON))
.andReturn().getResponse();
// then
assertThat(response.getStatus()).isEqualTo(HttpStatus.OK.value());
assertThat(response.getContentAsString()).isEqualTo(
jsonBook.write(new Book(1, "test book")).getJson()
);
}
private void canRetriveBookByIdV2() throws Exception {
given(bookService.getBookByID(123)).willReturn(Optional.of(new Book(123, "test book")));
MockHttpServletResponse response = mockMvc.perform(
get("/getBookById/123")
.accept(MediaType.APPLICATION_JSON))
.andReturn().getResponse();
// then
assertThat(response.getStatus()).isEqualTo(HttpStatus.OK.value());
assertThat(response.getContentAsString()).isEqualTo(
jsonBook.write(new Book(1, "test book")).getJson()
);
}
}
I was expecting test "canRetriveBookById" to run as well but only test "contextLoads" runs, not sure whats wrong here.

Answer 1

It's because your #Test method is private.
From the #Test annotations documentation:
#Test methods must not be private or static and must not return a value.