单元测试方法

Question

我想用以下单元测试单元测试方法，并希望获得有关如何为代客警报方法编写单元测试的帮助

public void onCreate() {
    mPreferences = getSharedPreferences(PREFS_TAG, 0);
    mSpeedAlertPreferences = new SpeedAlertPreferences(getSharedPreferences(SpeedAlert.PREFS_TAG, 0));
    mGeoFencingPreferences = new GeoFencingPreferences(getSharedPreferences(GeoFencing.PREFS_TAG, 0));
    if (!isEnabled()) {
        Log.d(LOG_TAG, "Disabled by configuration");
        return;
    }

    mLocationTracing = getSharedPreferences(PREFS_LOCATION_MANAGER, 0).getBoolean(PREF_LOCATION_TRACING, true);
    mConfigurationManager = CoreServices.getConfigurationManager(this);
    mAlarmManager = new AlarmManager(Clock.getRealtimeClock());
    mAlarmManager.onCreate();