LoginByFacebook.java

    @Test
    public void testFacebook_correctData_enterNotificationCenter() throws Exception {
        final UiDevice mDevice = 
                UiDevice.getInstance(InstrumentationRegistry.getInstrumentation());
                
        final int timeOut = 1000 * 60;

        // Login Activity
        onView(withId(R.id.btnFacebookLogin)).perform(click());

        // Facebook WebView - Page 1
            mDevice.wait(Until.findObject(By.clazz(WebView.class)), timeOut);

            // Set Login
            UiObject emailInput = mDevice.findObject(new UiSelector()
                .instance(0)
                .className(EditText.class));

            emailInput.waitForExists(timeOut);
            emailInput.setText("android_wppcmrq_facebook@tfbnw.net");

            // Set Password
            UiObject passwordInput = mDevice.findObject(new UiSelector()
                .instance(1)
                .className(EditText.class));

            passwordInput.waitForExists(timeOut);
            passwordInput.setText("testPassword");

            // Confirm Button Click
            UiObject buttonLogin = mDevice.findObject(new UiSelector()
                .instance(0)
                .className(Button.class));

            buttonLogin.waitForExists(timeOut);
            buttonLogin.clickAndWaitForNewWindow();

        // Facebook WebView - Page 2
            UiObject buttonOk = mDevice.findObject(new UiSelector()
                .instance(1)
                .className(Button.class));

            buttonOk.waitForExists(timeOut);
            buttonOk.click();

        // should be properly synchronised with Espresso via IdlingResource, 
        // ConditionWatcher or any similar waiting solution
            Thread.sleep(15000);

        // NotificationCenter Activity
        assertThat(getCurrentActivity() instanceof NotificationCenterActivity, is(true));
    }