使用模拟Retrofit API进行Android Espresso UI测试

Question

我正在使用UI Tests为我的Android应用创建Espresso。

我有一个login屏幕，其中只包含两个Fields（用户和密码）和一个Button。

我正在使用Retrofit，但我想嘲笑API回复，因此我创建了RetrofitMockClient。

例如，在下一个Test我有意输入错误的password来检查是否显示了error消息。

@Test
public void loginFailed() {
    onView(withId(R.id.login_user_name)).perform(typeText("myUser"));
    onView(withId(R.id.login_user_password)).perform(typeText("wrongPassword"), closeSoftKeyboard());

    onView(withId(R.id.login_button)).perform(click());

    // Failed login shows error message.
    onView(withText(R.string.login_error_message)).check(matches(isDisplayed()));
}

问题在于，当执行点击时，会触发Retrofit API来自我想要模拟的电话。

有关它的任何想法？我对UI Test / Unit Tests有点困惑，如果这个Test有意义。我只想检查error message在API过程中error返回login时是否显示MockWebServer。

提前致谢。

修改

我已经使用fzxt作为用户RestServiceTestHelper建议使用了class 示例中提供的Test @RunWith(AndroidJUnit4.class) public class LoginUIAndroidTest { private static MockWebServer mockWebServer; @Rule public ActivityTestRule<LoginActivity> mActivityRule = new IntentsTestRule<>(LoginActivity.class, true, // initialTouchMode false); // launchActivity - false so we could customize the intent @BeforeClass public static void startMockServer() throws Exception { mockWebServer = new MockWebServer(); mockWebServer.start(); mockWebServer.url("/"); } @AfterClass public static void shutdownMockServer() throws Exception { mockWebServer.shutdown(); } @Test public void testLoginSuccess() throws Exception { String fileName = "quote_login_200_ok.json"; mockWebServer.enqueue(new MockResponse() .setResponseCode(200) .setBody(RestServiceTestHelper.getStringFromFile(getInstrumentation().getContext(), fileName))); onView(withId(R.id.login_user_name)).perform(typeText("user")); onView(withId(R.id.login_user_password)).perform(typeText("password"), closeSoftKeyboard()); onView(withId(R.id.login_button)).perform(click()); // Successful login moves user to next screen. intended(hasComponent(new ComponentName(getInstrumentation().getTargetContext(), ProjekteActivity.class))); } 。

现在我的RestServiceTestHelper.java看起来像这样：

public class RestServiceTestHelper {

    public static String convertStreamToString(InputStream is) throws Exception {
        BufferedReader reader = new BufferedReader(new InputStreamReader(is));
        StringBuilder sb = new StringBuilder();
        String line;
        while ((line = reader.readLine()) != null) {
            sb.append(line).append("\n");
        }
        reader.close();
        return sb.toString();
    }

    public static String getStringFromFile(Context context, String filePath) throws Exception {
        final InputStream stream = context.getResources().getAssets().open(filePath);

        String ret = convertStreamToString(stream);
        //Make sure you close all streams.
        stream.close();
        return ret;
    }
}

LoginActivity：

 public class LoginActivity extends Activity {

        ...

        @OnClick(R.id.login_button)
        public void loginUser(final View view) {
            final MyRetrofitService service = createRetrofitService();

            service.login(new AuthenticationLoginDTO(email, password, deviceUUID), new Callback < AuthenticationDTO > () {
                @Override
                public void success(final AuthenticationDTO authenticationDTO, final Response response) {}

                @Override
                public void failure(final RetrofitError retrofitError) {}
            });

        }



        protected MyRetrofitService createRetrofitService() {
            final RequestInterceptor requestInterceptor = new RequestInterceptor() {
                @Override
                public void intercept(final RequestInterceptor.RequestFacade request) {
                    request.addHeader(getString(R.string.header_api_key), getString(R.string.api_key));
                    request.addHeader(getString(R.string.header_context), getString(R.string.context));
                }
            };
            final Gson dateTimeConverter = new GsonBuilder()
                .registerTypeAdapter(DateTime.class, new DateTimeConverter())
                .create();
            final RestAdapter restAdapter = new RestAdapter.Builder()
                .setEndpoint("/")
                .setConverter(new GsonConverter(dateTimeConverter))
                .setRequestInterceptor(requestInterceptor)
                .setExecutors(AsyncTask.THREAD_POOL_EXECUTOR, new MainThreadExecutor())
                .setLogLevel(RestAdapter.LogLevel.FULL).setLog(new AndroidLog(Config.TAG))
                .build();
            return restAdapter.create(MyRetrofitService.class);
        }
    }

这是我的Retrofit：

public interface NGOPService {

    String AUTHENTICATION_ENDPOINT = "";

    @POST(AUTHENTICATION_ENDPOINT)
    void login(@Body AuthenticationLoginDTO authRequest, Callback < AuthenticationDTO > callback);

}

Espresso界面：

click

我遗漏了某些内容，因为当Api执行MockWebServer操作时，正在调用真实onView(withId(R.id.login_button)).perform(click()); 而不是Dagger 2。

Retrofit 2.0

我已经看过使用Retrofit 1.9和 SELECT drawid,contact,dnd,mem.name, count(*) as numPayments,NULL numPaidPayments ,NULL PAID_CONTACT,NULL NAME_PAID FROM mem LEFT JOIN payment ON (mem.drawid = payment.draw) GROUP BY drawid HAVING numPayments < 4 UNION SELECT NULL drawid,NULL contact, NULL dnd, NULL name,NULL numPayments,COUNT(*) as numPaidPayments ,contact PAID_CONTACT,mem.name NAME_PAID FROM mem INNER JOIN payment ON (mem.drawid = payment.draw) GROUP BY drawid HAVING numPaidPayments >= 4 的一些示例，但不幸的是，我现在必须使用flash_messages.htm。

提前致谢。