    @Test
    public void setNewBookNotificationStatus_Unsubscribed_TurnsOn() {

        when(mockSettings.isSubscribedToNewBookNotification()).thenReturn(Single.just(false));
        when(mockSettings.setNewBookNotificationStatus(anyBoolean())).thenReturn(Single.just(true));

        presenter.setNewBookNotificationSubscriptionStatus(true);

        verify(mockSettings).setNewBookNotificationStatus(true);
        verify(mockAnalytics).trackUserToggleNewBookNotifications(true);

    }