Medium Part 3. WebServiceTest

WebServiceTest.kt

@RunWith(JUnit4::class)
class WebServiceTest {

    @Rule
    @JvmField
    var instantExecutor = InstantTaskExecutorRule()

    private lateinit var webService: WebService
    private lateinit var mockWebServer: MockWebServer

    @Before
    fun setup() {
        mockWebServer = MockWebServer()
        mockWebServer.start()

        webService = Retrofit.Builder()
                .addConverterFactory(MoshiConverterFactory.create())
                .baseUrl(mockWebServer.url("/"))
                .client(OkHttpClient())
                .build()
                .create(WebService::class.java)
    }

    @After
    fun tearDown() {
        mockWebServer.shutdown()
    }

    @Test
    fun getRestaurantsTest() {
        val content = this.javaClass.classLoader.getResource("get-restaurants-cases/valid.json").readText(Charset.forName("UTF-8"))
        mockWebServer.enqueue(MockResponse()
                .setResponseCode(200)
                .setBody(content))

        val restaurant = Restaurant(id = 1, cuisine = 1, name = "Mi Cevichazo", lat = -33.431756, lng = -70.578719, price = 8900,
                image = "https://www.atrapalo.cl/common/photo/res/44559/106814/ticr_0_0.jpg", description = "Todo el sabor del Perú está presente en el restaurante Mi Cevichazo.")

        val response = webService.getRestaurants().execute()
        Assert.assertTrue(response.isSuccessful)
        Assert.assertNotNull(response.body())
        Assert.assertEquals(response.body()!!.first(), restaurant)
    }
}