ReservationRestControllerTests.java

package demo;

import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.SpringApplicationContextLoader;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.StringHttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.context.web.WebAppConfiguration;
import org.springframework.test.web.client.MockRestServiceServer;
import org.springframework.test.web.servlet.MockMvc;
import org.springframework.test.web.servlet.MvcResult;
import org.springframework.test.web.servlet.setup.MockMvcBuilders;
import org.springframework.web.client.RestTemplate;
import org.springframework.web.context.WebApplicationContext;

import java.util.ArrayList;
import java.util.List;

import static org.assertj.core.api.Assertions.assertThat;
import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = Application.class, loader = SpringApplicationContextLoader.class)
@WebAppConfiguration
public class ReservationRestControllerTests {

    @Autowired
    private WebApplicationContext wac;

    private MockRestServiceServer mockServer;
    private RestTemplate restTemplate;
    private MockMvc mockMvc;

    @Before
    public void setup() {
        List<HttpMessageConverter<?>> converters = new ArrayList<HttpMessageConverter<?>>();
        converters.add(new StringHttpMessageConverter());
        converters.add(new MappingJackson2HttpMessageConverter());

        this.restTemplate = new RestTemplate();
        this.restTemplate.setMessageConverters(converters);

        this.mockServer = MockRestServiceServer.createServer(this.restTemplate);
        this.mockMvc = MockMvcBuilders.webAppContextSetup(this.wac).build();
    }

    @Test
    public void test_reservationsAreApplicationJsonEncoded()
            throws Exception {

        MediaType mediaTypeOfRestService = MediaType.parseMediaType("application/json;charset=UTF-8");

        MvcResult mvcResult = this.mockMvc.perform(get("/reservations")
                .accept(mediaTypeOfRestService))
                .andExpect(status().isOk())
                .andExpect(content().contentType(mediaTypeOfRestService))
                .andReturn();
        String responseFromSpringMvc = mvcResult.getResponse().getContentAsString();
        assertThat(mvcResult.toString()).isNotNull();
        assertThat(responseFromSpringMvc).contains("Longs").contains("Changs");
    }


}