Unit Test REST endpoint with MockMvc and check if status is 200 OK

tdd-spring-v1-CarControllerTest.java

package com.example.tdd.controller;

import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;

import org.junit.Test;
import org.junit.runner.RunWith;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
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.ResultActions;
import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;


/**
 * @WebMvcTest annotation will load only a small part of spring web application
 *             context instead of full spring application context as
 *             in @SpringBootTest
 * @author Ronak
 *
 */
@RunWith(SpringRunner.class)
@WebMvcTest(CarController.class)
public class CarControllerTest {

	@Autowired
	private MockMvc mockMvc;

	@Test
	public void getCar_shouldReturnCar() throws Exception {

		// Make request to controller through spring only.
		// This does not involve tomcat or any network call.
		ResultActions resultActions = mockMvc.perform(MockMvcRequestBuilders.get("/cars/prius"))
				.andExpect(status().isOk());
	}
	
}