Ich habe gerade über Unit Instrumented Testing in Android gelesen und frage mich, wie ich SharedPreferences ohne SharedPreferencesHelper-Klasse wie @ verspotten kanHie

Mein Code ist:

public class Auth {
private static SharedPreferences loggedUserData = null;
public static String getValidToken(Context context)
{
    initLoggedUserPreferences(context);
    String token = loggedUserData.getString(Constants.USER_TOKEN,null);
    return token;
}
public static String getLoggedUser(Context context)
{
    initLoggedUserPreferences(context);
    String user = loggedUserData.getString(Constants.LOGGED_USERNAME,null);
    return user;
}
public static void setUserCredentials(Context context, String username, String token)
{
    initLoggedUserPreferences(context);
    loggedUserData.edit().putString(Constants.LOGGED_USERNAME, username).commit();
    loggedUserData.edit().putString(Constants.USER_TOKEN,token).commit();
}

public static HashMap<String, String> setHeaders(String username, String password)
{
    HashMap<String, String> headers = new HashMap<String, String>();
    String auth = username + ":" + password;
    String encoding = Base64.encodeToString(auth.getBytes(), Base64.DEFAULT);
    headers.put("Authorization", "Basic " + encoding);
    return headers;
}

public static void deleteToken(Context context)
{
    initLoggedUserPreferences(context);
    loggedUserData.edit().remove(Constants.LOGGED_USERNAME).commit();
    loggedUserData.edit().remove(Constants.USER_TOKEN).commit();
}

public static HashMap<String, String> setHeadersWithToken(String token) {
    HashMap<String, String> headers = new HashMap<String, String>();
    headers.put("Authorization","Token "+token);
    return headers;
}
private static SharedPreferences initLoggedUserPreferences(Context context)
{
    if(loggedUserData == null)
        loggedUserData = context.getSharedPreferences(Constants.LOGGED_USER_PREFERENCES,0);
    return loggedUserData;
}}

Ist es möglich, SharedPreferences zu verspotten, ohne eine andere Klasse zu erstellen?