Add success test

MainActivityTest.kt

@UninstallModules(
    UrlModule::class
)
@HiltAndroidTest
@RunWith(AndroidJUnit4::class)
class MainActivityTest {

    @get:Rule
    val hiltRule = HiltAndroidRule(this)

    private val mockWebServer = MockWebServer()

    @Before
    fun setUp(){
        IdlingRegistry.getInstance().register(TestIdlingResource.countingIdlingResource)
        mockWebServer.start(8080)
    }

    @Test
    fun screenIsReady(){
        mockWebServer.dispatcher = MockServerDispatcher().RequestDispatcher()
        val scenario = launchActivity<MainActivity>()
        onView(withId(R.id.recyclerViewMovies)).check { view, noViewFoundException ->
            if (noViewFoundException != null) {
                throw noViewFoundException
            }
            val recyclerView = view as RecyclerView
            assertEquals(21, recyclerView.adapter?.itemCount)
        }
        scenario.close()
    }

    @After
    fun tearDown(){
        mockWebServer.shutdown()
        IdlingRegistry.getInstance().unregister(TestIdlingResource.countingIdlingResource)
    }

    @Module
    @InstallIn(SingletonComponent::class)
    class FakeBaseUrlModule {
        @Provides
        @Singleton
        fun provideUrl() : String = "http://127.0.0.1:8080"
    }
}