@Test
public void testGetAlternativeLocales05() throws Exception {

    // 前処理
    DataSourceMessageSource ds = new DataSourceMessageSource();
    Locale locale = new Locale("ja", "", "");
    ds.defaultLocale = null;
    // テスト実施
    List<Locale> locales = ds.getAlternativeLocales(locale);
    // 判定
    assertEquals(0, locales.size());
}