java-tutorials/spring-rest/src/test/java/com/baeldung/controllers/ExamplePostControllerRequestIntegrationTest.java

package com.baeldung.controllers;

import com.baeldung.services.ExampleService;
import com.baeldung.transfer.LoginForm;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.InjectMocks;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
import org.springframework.test.web.servlet.MockMvc;
import org.springframework.test.web.servlet.setup.MockMvcBuilders;
import org.baeldung.config.MainApplication;

import static org.mockito.Mockito.when;
import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
import static org.springframework.test.web.servlet.result.MockMvcResultHandlers.print;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;

@RunWith(SpringRunner.class)
@SpringBootTest(classes = MainApplication.class)
public class ExamplePostControllerRequestIntegrationTest {

    MockMvc mockMvc;
    @Mock private ExampleService exampleService;
    @InjectMocks private ExamplePostController exampleController;
    private final String jsonBody = "{\"username\": \"username\", \"password\": \"password\"}";
    private LoginForm lf = new LoginForm();

    @Before
    public void preTest() {
        MockitoAnnotations.initMocks(this);
        mockMvc = MockMvcBuilders
          .standaloneSetup(exampleController)
          .build();
        lf.setPassword("password");
        lf.setUsername("username");
    }

    @Test
    public void requestBodyTest() {
        try {
            when(exampleService.fakeAuthenticate(lf)).thenReturn(true);
            mockMvc
              .perform(post("/post/request")
                .content(jsonBody)
                .contentType("application/json"))
              .andDo(print())
              .andExpect(status().isOk());
        } catch (Exception e) {
            System.out.println("Exception: " + e);
        }
    }
}